Common use of Cash Settlement Option Clause in Contracts

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. By: Ares Institutional Loan Fund GP, LLC, its general partner By: /s/ Xxx Xxxxxx Name: Xxx Xxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Pramerica Loan Fund, L.P. Opportunities Limited By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Investment Manager By: /s/ Xxx Xxxxxx Xxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxx Xxxxxxx Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC PGIM, Inc. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Xxxxxx 50 Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxx Xxxxxxx Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC PGIM, Inc. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundXxxx Square CLO, L.P. Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. ERIE INDEMNITY COMPANY By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC., as its general partner investment manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Cardinal Fund, L.P. By: Ares Institutional Loan Fund GPHPS Investment Partners, LLC, its general partner as Investment Manager By: /s/ Xxx Xxxxxx Xxxxx Xxxx Name: Xxx Xxxxxx Xxxx, Xxxxx Title: Authorized Signatory md If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management HPS Investment Partners, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Xxxxxx XXV Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Pahdya Name: Xxx Xxxxxx Xxxxx Pahdya Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundLockwood Grove CLO, L.P. Ltd. By: Ares Institutional Loan Fund GPTall Tree Investment Management, LLC, its general partner LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxx X. Xxxxxxxx Xx. Name: Xxx Xxxxxx Xxxxxxx X. Xxxxxxxx Xx. Title: Authorized Signatory Officer If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. XLIII CLO Ltd. By: Ares Institutional Loan Fund GP, CLO Management LLC, as its general partner Asset Manager By: /s/ Xxx Xxxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundXxxxxxx Park CLO, L.P. Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundNelder Grove CLO, L.P. Ltd. By: Ares Institutional Loan Fund GPTall Tree Investment Management, LLC, its general partner LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxx X. Xxxxxxxx Xx. Name: Xxx Xxxxxx Xxxxxxx X. Xxxxxxxx Xx. Title: Authorized Signatory Officer If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundSeneca Park CLO, L.P. Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x o CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Xxxxxx XXVIII Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Pahdya Name: Xxx Xxxxxx Xxxxx Pahdya Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. By: Ares Institutional Loan Canoe Floating Rate Income Fund GP, LLC, its general partner By: /s/ Xxx Xxxxxx Xxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxx Xxxxxxxxx Title: Authorized Signatory Associate Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Virtus Partners LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundAnchorage Capital CLO 8, L.P. Ltd. By: Ares Institutional Loan Fund GPAnchorage Capital Group, LLCL.L.C., its general partner Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Anchorage Capital Group, L.L.C. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundElevation CLO 2017-7, L.P. Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner 325 Fillmore LLC As Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxxxx Title: Authorized Signatory Portfolio Manager If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management ArrowMark Colorado Holdings LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. ATRIUM XI By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as portfolio manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundAnchorage Capital CLO 6, L.P. ByLtd. BY: Ares Institutional Loan Fund GPAnchorage Capital Group, LLCL.L.C., its general partner Investment Manager By: /s/ Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Anchorage Capital Group, L.L.C. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundAMMC CLO XI, L.P. ByLIMITED BY: Ares Institutional Loan Fund GPAmerican Money Management Corp., LLC, its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx X. Xxxxx Name: Xxx Xxxxxx Xxxxx X. Xxxxx Title: Authorized Signatory Senior Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares American Money Management LLC Corp. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional GoldenTree Loan FundManagement US CLO 1, L.P. Ltd. By: Ares Institutional GoldenTree Loan Fund GPManagement, LLC, its general partner LP By: /s/ Xxx Xxxxxx Xxxxx Xxxxx Name: Xxx Xxxxxx Xxxxx Xxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Golden Tree Asset Management, LP Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundAnchorage Credit Funding 3, L.P. Ltd By: Ares Institutional Loan Fund GPAnchorage Capital Group, LLCL.L.C., its general partner Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Anchorage Capital Group, L.L.C. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundGoldenTree Credit Opportunities 2012-1 Financing Limited By: GoldenTree Asset Management, L.P. By: Ares Institutional Loan Fund GP, LLC, its general partner By: /s/ Xxx Xxxxxx Xxxxx Xxxxx Name: Xxx Xxxxxx Xxxxx Xxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Golden Tree Asset Management, LP Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. Saranac CLO VII Limited By: Ares Institutional Loan Fund GP, LLC, its general partner Canaras Capital Management LLC As Service Provider By: /s/ Xxx Xxxxxx Xxxx XxXxxx Name: Xxx Xxxxxx Xxxx XxXxxx Title: Authorized Signatory Analyst If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Canaras Capital Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundCedar Funding VI CLO, L.P. Ltd. By: Ares Institutional Loan Fund GPAEGON USA Investment Management, LLC, as its general partner Portfolio Manager By: /s/ Xxx Xxxxxx Neslihan Adanali Name: Xxx Xxxxxx Neslihan Adanali Title: Authorized Signatory Loan Closer II If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Virtus Partners LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. Canoe Floating Rate Income Fund By: Ares Institutional Loan Fund GPAEGON USA, LLC, as its general partner Investment Advisor By: /s/ Xxx Xxxx Xxxxxx Name: Xxx Xxxx Xxxxxx Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Aegon USA Investment Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundSound Point CLO IV, L.P. ByLtd BY: Ares Institutional Loan Fund GPSound Point Capital Management, LLC, its general partner LP as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxx Name: Xxx Xxxxxx Xxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Sound Point Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundVenture XXVII CLO, L.P. Limited By: Ares Institutional Loan Fund GP, LLC, its general partner investment advisor MJX Venture Management II LLC By: /s/ Xxx Xxxxxxxxx Xxxxxx Name: Xxx Xxxxxxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares MJX Asset Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x o CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundThacher Park CLO, L.P. ByLtd. BY: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. ATRIUM XII By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as portfolio manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundTransamerica Floating Rate BY: AEGON USA, L.P. By: Ares Institutional Loan Fund GP, LLC, as its general partner Investment Advisor By: /s/ Xxx Xxxx Xxxxxx Name: Xxx Xxxx Xxxxxx Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Aegon USA Investment Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. Blackstone / GSO Long-Short Credit Income Fund By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Investment Advisor By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundMadison Park Funding XX, L.P. ByLtd. BY: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as portfolio manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundMadison Park Funding XI, L.P. Ltd. By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as portfolio manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundAnchorage Capital CLO 2012-1, L.P. ByLtd. BY: Ares Institutional Loan Fund GPAnchorage Capital Group, LLCL.L.C., its general partner Investment Manager By: /s/ Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Anchorage Capital Group, L.L.C. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. XLII CLO Ltd. By: Ares Institutional Loan Fund GP, CLO Management II LLC, its general partner asset manager By: /s/ Xxx Xxxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundMadison Park Funding XXIII, L.P. Ltd. By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner LLC as Collateral Manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Highbridge Loan FundManagement 4-2014, L.P. Ltd. By: Ares Institutional Loan Fund GPHPS Investment Partners , LLC, its general partner LLC As the Collateral Manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Senior Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management HPS Investment Partners, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundGrippen Park CLO, L.P. Ltd. By: Ares Institutional Loan Fund GPGSO / Blackstone Debt Funds Management LLC as Collateral Manager to Warehouse Parent, LLC, its general partner Ltd. By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundStewart Park CLO, L.P. ByLtd. BY: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Xxxxxx 42 Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Pahdya Name: Xxx Xxxxxx Xxxxx Pahdya Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan CQS Credit Multi Asset Fund, L.P. By: Ares Institutional Loan Fund GP, LLC, its general partner a sub-fund of CQS Global Funds (Ireland) plc By: /s/ Xxx Xxxxxx Xxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxx Xxxxxxx Title: Authorized Authorised Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Credit Fund, L.P. LP By: Ares Institutional Loan Fund GP, Credit GP LLC, its general partner By: /s/ Xxx Xxxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxxxx Title: Authorized Signatory Signature If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. SARANAC CLO V LIMITED By: Ares Institutional Loan Fund GPCanaras Capital Management, LLC, its general partner LLC As Sub-Investment Adviser By: /s/ Xxx Xxxxxx Xxxx XxXxxx Name: Xxx Xxxxxx Xxxx XxXxxx Title: Authorized Signatory Analyst If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Canaras Capital Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. XL CLO Ltd. By: Ares Institutional Loan Fund GP, CLO Management II LLC, its general partner asset manager By: /s/ Xxx Xxxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Xxxxxx 49 Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxx Xxxxxxx Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC PGIM, Inc. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. ByXxxxx Park CLO Ltd. BY: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. Taconic Park CLO Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. Atrium X BY: By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as portfolio manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundMadison Park Funding XII, L.P. Ltd. By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as portfolio manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. Dorchester Park CLO Designated Activity Company By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundVenture XXII CLO, L.P. Limited By: Ares Institutional Loan Fund GP, LLC, its general partner investment advisor MJX Venture Management LLC By: /s/ Xxx Xxxxxxxxx Xxxxxx Name: Xxx Xxxxxxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares MJX Asset Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundBristol Park CLO, L.P. By: Ares Institutional Loan Fund GP, LLC, its general partner Ltd By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional CCP Loan Fund, L.P. Funding LLC By: Ares Institutional Loan Fund GPCitibank, LLCN.A., its general partner By: /s/ Xxx Xxxxxx Xxxxxxx Xxxxxxxx Name: Xxx Xxxxxx Xxxxxxx Xxxxxxxx Title: Authorized Signatory Associate Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Virtus Partners LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundMadison Park Funding XIII, L.P. ByLtd. BY: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as portfolio manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundAnchorage Capital CLO 5, L.P. ByLtd. BY: Ares Institutional Loan Fund GPAnchorage Capital Group, LLCL.L.C., its general partner Investment Manager By: /s/ Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Anchorage Capital Group, L.L.C. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. Cumberland Park CLO Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. Greenwood Park CLO Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. XLV CLO Ltd. By: Ares Institutional Loan Fund GP, CLO Management II LLC, its general partner Asset Manager By: /s/ Xxx Xxxxxx Name: Xxx Xxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. NHIT: Senior Floating Rate and Fixed Income Trust By: Ares Institutional Loan Fund GPXxxxxx Xxxxxx Trust Company, LLC, its general partner Trustee By: /s/ Xxx Xxxxxx Xxxx XxXxxxxx Name: Xxx Xxxxxx Xxxx XxXxxxxx Title: Authorized Signatory Vice President, Legal and Compliance Analyst If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Xxxxxx Xxxxxx Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x o CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundMadison Park Funding XXII, L.P. Ltd. By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as portfolio manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundVenture XXX CLO, L.P. Limited By: Ares Institutional Loan Fund GP, LLC, its general partner investment advisor MJX Venture Management II LLC By: /s/ Xxx Xxxxxxxxx Xxxxxx Name: Xxx Xxxxxxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares MJX Asset Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundXxxxxxx Park CLO, L.P. Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundSound Point CLO VI, L.P. ByLtd. BY: Ares Institutional Loan Fund GPSound Point Capital Management, LLC, its general partner LP as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxx Name: Xxx Xxxxxx Xxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Sound Point Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundMADISON PARK FUNDING XIV, L.P. ByLTD. BY: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as portfolio manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundVenture XVIII CLO, L.P. Limited By: Ares Institutional Loan Fund GP, LLC, its general partner investment advisor MJX Asset Management LLC By: /s/ Xxx Xxxxxxxxx Xxxxxx Name: Xxx Xxxxxxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares MJX Asset Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundAnchorage Credit Funding 4, L.P. Ltd By: Ares Institutional Loan Fund GPAnchorage Capital Group, LLCL.L.C., its general partner Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Anchorage Capital Group, L.L.C. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Xxxxxx 49 Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Pahdya Name: Xxx Xxxxxx Xxxxx Pahdya Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Highbridge Loan FundManagement 7-2015, L.P. Ltd. By: Ares Institutional Loan Fund GPHPS Investment Partners, LLC, its general partner Collateral Manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Senior Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management HPS Investment Partners, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundDOLLAR SENIOR LOAN FUND, L.P. LTD. By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as investment manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. XXXIX CLO Ltd. By: Ares Institutional Loan Fund GP, CLO Management II LLC, its general partner asset manager By: /s/ Xxx Xxxxxx Name: Xxx Xxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. Apex Credit CLO 2016 Ltd. By: Ares Institutional Loan Fund GP, LLCApex Credit Partners, its general partner Asset Manager By: /s/ Xxx Xxxxxx Xxxxx Name: Xxx Xxxxxx Xxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Apex Credit Partners LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Cardinal Fund, L.P. By: Ares Institutional Loan Fund GPHPS Investment Partners, LLC, its general partner as Investment Manager By: /s/ Xxx Xxxxxx Xxxxx Xxxx Name: Xxx Xxxxxx Xxxxx Xxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management HPS Investment Partners, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundXXXXXXX XXXX CLO, L.P. LTD. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Xxxxxx 41 Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxx Xxxxxxx Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC PGIM, Inc. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundCedar Funding V CLO, L.P. Ltd. By: Ares Institutional Loan Fund GPAEGON USA Investment Management, LLC, as its general partner Portfolio Manager By: /s/ Xxx Xxxxxx Neslihan Adanali Name: Xxx Xxxxxx Neslihan Adanali Title: Authorized Signatory Loan Closer II If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Virtus Partners LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundCatskill Park CLO, L.P. Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundVenture XXIV CLO, L.P. Limited By: Ares Institutional Loan Fund GP, LLC, its general partner investment advisor MJX Asset Management LLC By: /s/ Xxx Xxxxxxxxx Xxxxxx Name: Xxx Xxxxxxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares MJX Asset Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundACIS CLO 2014-4, L.P. Ltd. By: Ares Institutional Loan Fund GPAcis Capital Management, LLCL.P., its general partner Portfolio Manager By: /s/ Xxx Xxxxxx Xxxxx Name: Xxx Xxxxxx Xxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Highland Capital Management, L.P. (Institutional) Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. CVP Cascade CLO-1 Ltd. By: Ares Institutional Loan Fund GPCVP CLO Manager, LLC, its general partner LLC as Investment Manager By: /s/ Xxx Xxxxxx Xxxxxx Name: Xxx Xxxxxx Xxxxxx Title: Authorized Signatory Portfolio Manager If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Credit Value Partners LP Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Xxxxxx 37 Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxx Xxxxxxx Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC PGIM, Inc. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. Xxxxxxx Xxxxx Trust on behalf of the Xxxxxxx Sachs High Yield Floating Rate Fund By: Ares Institutional Loan Fund GPXxxxxxx Xxxxx Asset Management, LLCL.P., its general partner as investment advisor and not as principal $14,233,913.20 By: /s/ Xxxxx Xxx Xxxxxx Name: Xxxxx Xxx Xxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundSound Point CLO X, L.P. Ltd. By: Ares Institutional Loan Fund GPSound Point Capital Management, LLC, its general partner LP as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxx Name: Xxx Xxxxxx Xxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Sound Point Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundCOPPERHILL LOAN FUND I, L.P. ByLLC BY: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner as investment manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundBirchwood Park CLO, L.P. Ltd. By: Ares Institutional Loan Fund GP, LLC, its general partner GSO / Blackstone Debt Funds Management LLC as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC GSO Capital Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundCedar Funding VII CLO, L.P. Ltd. By: Ares Institutional Loan Fund GPAEGON USA Investment Management, LLC, as its general partner Portfolio Manager By: /s/ Xxx Xxxxxx Xxxx Xxxxxxxxx Name: Xxx Xxxxxx Xxxx Xxxxxxxxx Title: Authorized Signatory Associate Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Virtus Partners LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional GoldenTree Loan FundOpportunities IX, L.P. Limited By: Ares Institutional Loan Fund GPGoldenTree Asset Management, LLC, its general partner LP By: /s/ Xxx Xxxxxx Xxxxx Xxxxx Name: Xxx Xxxxxx Xxxxx Xxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Golden Tree Asset Management, LP Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. Fund B.V. By: Ares Institutional Loan Fund GPManagement Limited, LLC, its general partner as manager By: /s/ Xxx Xxxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. JFIN CLO 2014-II LTD. By: Ares Institutional Loan Fund GP, Apex Credit Partners LLC, its general partner as Portfolio Manager By: /s/ Xxx Xxxxxx Xxxxx Name: Xxx Xxxxxx Xxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Apex Credit Partners LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundVenture XXIV CLO, L.P. Limited By: Ares Institutional Loan Fund GP, LLC, its general partner investment advisor MJX Asset Management LLC By: /s/ Xxx Xxxxxxxxx Xxxxxx Name: Xxx Xxxxxxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares MJX Asset Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x o CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Xxxxxx 45 Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Pahdya Name: Xxx Xxxxxx Xxxxx Pahdya Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Xxxxxx XXIV Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Pahdya Name: Xxx Xxxxxx Xxxxx Pahdya Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan Fund, L.P. Saranac CLO III Limited By: Ares Institutional Loan Fund GPCanaras Capital Management, LLC, its general partner LLC As Sub-Investment Adviser By: /s/ Xxx Xxxxxx Xxxx XxXxxx Name: Xxx Xxxxxx Xxxx XxXxxx Title: Authorized Signatory Analyst If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Canaras Capital Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Xxxxxx 42 Senior Loan Fund, L.P. Fund By: Ares Institutional Loan Fund GPPGIM, LLCInc., its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxx Xxxxxxx Title: Authorized Signatory Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC PGIM, Inc. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. XLI CLO Ltd. By: Ares Institutional Loan Fund GP, CLO Management II LLC, its general partner as asset manager By: /s/ Xxx Xxxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundMadison Park Funding XXIV, L.P. Ltd. By: Ares Institutional Loan Fund GPCredit Suisse Asset Management, LLC, its general partner LLC as Collateral Manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management Credit Suisse Asset Management, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan FundVenture XXIII CLO, L.P. Limited By: Ares Institutional Loan Fund GP, LLC, its general partner investment advisor MJX Asset Management LLC By: /s/ Xxx Xxxxxxxxx Xxxxxx Name: Xxx Xxxxxxxxx Xxxxxx Title: Authorized Signatory Managing Director If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares MJX Asset Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundACIS CLO 2014-5, L.P. Ltd. By: Ares Institutional Loan Fund GPAcis Capital Management, LLCL.P., its general partner Portfolio Manager By: /s/ Xxx Xxxxxx Xxxxx Name: Xxx Xxxxxx Xxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Highland Capital Management, L.P. (Institutional) Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Fourth Amendment Effective Date and to purchase by assignment Tranche C B Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C B Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans in Tranche C B Term Loans. Ares Institutional Loan Fund, L.P. Stichting Pensioenfonds Hoogovens By: Ares Institutional Loan Fund GP, Capital Management III LLC, its general partner Asset Manager By: /s/ Xxx Xxxxxx Xxxxxxx Name: Xxx Xxxxxx Xxxxxxx Title: Authorized Signatory If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Original Initial Term Loans (“you”), hereby consents to the Fifth Fourth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January January, 31, 2017, 2017 and by the Third Amendment to First Lien Credit Agreement dated as of January January, 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15August, 2018 14 2017 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Original Initial Term Loans held by such Existing Tranche B Term Lender for a Tranche C B Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans for Tranche C B Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Original Initial Term Loans and the allocated principal amount of Tranche C B Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Fourth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional Loan FundAMMC CLO 17, L.P. ByLIMITED BY: Ares Institutional Loan Fund GPAmerican Money Management Corp., LLC, its general partner as Collateral Manager By: /s/ Xxx Xxxxxx Xxxxx X. Xxxxx Name: Xxx Xxxxxx Xxxxx X. Xxxxx Title: Authorized Signatory Senior Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares American Money Management LLC Corp. Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.

Cash Settlement Option. The undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and having 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender repaid on the Fifth Amendment Effective Date and to purchase by assignment Tranche C Term Loans in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to allocate Tranche C Term Loans to such Existing Tranche B Term Lender or to allocate less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans in Tranche C Term Loans. Ares Institutional HPS Loan FundManagement 3-2014, L.P. Ltd. By: Ares Institutional Loan Fund GPHPS Investment Partners CLO (US), LLC, its general partner as investment manager By: /s/ Xxx Xxxxx Xxxxxx Name: Xxx Xxxxx Xxxxxx Title: Authorized Signatory Senior Vice President If a second signature is necessary: By: Name: Title: Name of Fund Manager (if any): Ares Management HPS Investment Partners, LLC Exhibit A [Form of Lender Signature Page to Amendment] The undersigned, a Lender holding Tranche B Term Loans (“you”), hereby consents to the Fifth Amendment to that certain First Lien Credit Agreement, dated as of August 20, 2015 (as amended, amended and restated, supplemented or otherwise modified prior to the date hereof, including by an Increase Supplement dated as of November 30, 2015, by the First Amendment to First Lien Credit Agreement dated as of November 30, 2015, by an Increase Supplement dated as of October 5, 2016, by the Second Amendment to First Lien Credit Agreement dated as of October 5, 2016, by an Increase Supplement dated as of January 31, 2017, by the Third Amendment to First Lien Credit Agreement dated as of January 31, 2017 and by the Fourth Amendment to the First Lien Credit Agreement dated as of August 14, 2017, the “Existing First Lien Credit Agreement”), among LBM BORROWER, LLC, a Delaware limited liability company (the “Borrower”), LBM MIDCO, LLC, a Delaware limited liability company (“Holding”), the Lenders party hereto and CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Administrative Agent (in such capacity, the “Administrative Agent”) and as Collateral Agent (in such capacity, the “Collateral Agent”) and the Lenders party thereto, which is proposed to be dated on or around February 15, 2018 and to be entered into among the Borrower, Holding, the several banks and financial institutions parties thereto as Lenders and the Administrative Agent (the “Amendment”) and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment. Capitalized terms used and not otherwise defined herein shall have the respective meanings given to such terms in the Amendment or the Existing First Lien Credit Agreement, as applicable. If you are an Existing Tranche B Term Lender, you, if and only if you indicate below, hereby irrevocably and unconditionally approve of, and consent to, the Amendment, and to the attachment of this Existing Tranche B Term Lender Signature Page to the Amendment, and hereby agree that all parties to the Amendment are express third party beneficiaries of this Existing Tranche B Term Lender Signature Page to the Amendment and hereby further agree as follows: [Check ONLY ONE of the two boxes below] x CASHLESS ROLLOVER OPTION Each undersigned Existing Tranche B Term Lender hereby irrevocably and unconditionally approves of, and consents to, the Amendment and the exchange (on a cashless basis) of 100% of the outstanding principal amount of the Tranche B Term Loans held by such Existing Tranche B Term Lender for a Tranche C Term Loan in a like principal amount. By choosing this option, each undersigned Existing Tranche B Term Lender hereby (i) acknowledges and agrees that the Administrative Agent may, in its sole discretion, elect not to exchange any amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans or to exchange (on a cashless basis) less than 100% of the principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans for Tranche C Term Loans, in which case the difference between the current principal amount of such Existing Tranche B Term Lender’s Tranche B Term Loans and the allocated principal amount of Tranche C Term Loans will be prepaid on, and subject to the occurrence of, the Fifth Amendment Effective Date and (ii) agrees to the terms of the “Cashless Roll Letter” posted on or around the date hereof to each Existing Tranche B Term Lender and shall be a party to such “Cashless Roll Letter”, and be bound thereby, for all purposes hereof and thereof.