Common use of Surface Preparation Clause in Contracts

Surface Preparation. 1. The Contractor shall examine the areas and conditions under which work will be performed. The Contractor shall ensure that each surface is cleaned and prepared as required for proper adhesion. 2. The Contractor shall correct conditions detrimental to timely and proper completion of the work, to include but not limited to the repair of minor holes, cracks, chips, rips, dings, etc. Should any surface be found unsuitable to produce a proper paint or sealant finish, the Contractor shall notify the County’s Service Coordinator in writing and no painting products shall be applied until the unsuitable surfaces have been approved as satisfactory. 3. For proper adhesion, the Contractor shall ensure that all surfaces to be coated are cleaned and free from rust, dirt, mildew, mold, algae, grease, oil, peeling and/or loose paint, powdery chalky residues and any other material or condition that may inhibit bonding and adhesion. Deterioration shall be removed with a combination of solvent or detergent washing, hand or power tool cleaning, to bring back to an acceptable surface. Glossy areas of sound previous coating need not be removed but should be mechanically abraded or chemically treated to create a surface profile that increases coating adhesion. 4. The Contractor shall pressure clean exterior surfaces according to the pressure cleaning specification below where needed. Should old coatings begin to peel off, the Contractor shall use additional removal techniques to achieve a solid substrate including higher pressure washing, scraping, and wire brushing or ultimately, wet or dry sand blasting may be needed. 5. On some buildings where elastomeric coatings were previously used, tests shall be made with a scraper to assure proper adhesion. If proper surface preparation underneath the elastomeric coating was not properly done, the elastomeric shall be peeled off with at least 3000 psi and with hand methods as necessary. 6. The Contractor shall verify that all substrate conditions are ready to receive work prior to application of any painting products (primer, finish coats, etc.) 7. The Contractor shall remove or mask electrical plates, nomenclature plates, hardware, trim or fittings prior to preparing surfaces or finishing. The Contractor shall ensure that all items removed are replaced to their original condition or better, prior to completion of the job. 8. Rust Removal x. Xxxx particles in stucco: For areas of rust run down from small embedded iron particles in stucco, the Contractor shall chip out the spots as best possible to remove the source of the rusting. Any remaining rust stains shall be sealed to prevent it from bleeding through. b. Exposed rusted rebar: For those areas with exposed xxxxx xxxxx, the Contractor shall determine if sufficient structural damage has occurred to warrant concrete restoration. If that is the case, this work will be outside the scope of services of this contract, and the paint work shall be stopped until the County can provide for the proper restoration of the spalled, cracked stucco that occurred due to the exposed rusted rebar. In areas of light rust bleeding through from slightly exposed rebar, the rebar shall be wire brushed thoroughly and spot primed. c. Exposed metal surfaces: All exposed metal having xxxxx areas shall be hand tooled and/or mechanically abraded back to a bright metal finish in accordance with applicable SSPC standards. These areas shall then be treated with Ospho or equivalent rust inhibitor, primed and painted according to material schedule. 9. Caulking Removal and Sealant a. The Contractor shall ensure that all construction joints, expansion joints, inside angles or changes of direction, junctions of dissimilar materials (such as wood to stucco, metal to stucco, etc.), through wall penetrations (such as pipes, conduit, anchor bolts, etc.), window, all 90 degree angles on the top-side of all window xxxxx, junction of the metal cap where one piece overlaps another, door, and slab joints are carefully inspected for caulking deterioration, loss of adhesion, cracking, etc. The Contractor shall ensure that failing caulk is removed thoroughly and the area cleaned with an appropriate solvent. Use of mineral spirits or turpentine is prohibited. Once caulk is removed and the void cleaned to a sound substrate, the Contractor shall install an acrylic-latex silicone or polyurethane caulk/sealant. b. The Contractor shall ensure that all areas being caulked are prepared as directed on the sealant product data sheets. c. The Contractor shall make every effort possible to reduce the “open time” of prepared joints to receive new caulk/sealant to prevent water intrusion.