Common use of Wall Insulation Clause in Contracts

Wall Insulation. Batt thermal Insulation for exterior walls of the building shall be mineral or glass fiber conforming to federal specifications HH-I-S21 and ASTM C665. Flame spread shall not exceed 25, ASTM E84. Xxxxx shall be rated at R-19 or better. Sound attenuation batt insulation for interior walls shall be 3” thick, USG Thermafiber conforming to ASTM C655, and federal specification HH-1-521E, type I or II. Please see note in 7.1 above regarding sound transmission coefficient.