HH-I-1972/4, FEDERAL SPECIFICATION, INSULATION BOARD, THERMAL, POLYURETHANE OR POLYISOCYANURATE FACED WlTH GYPSUM BOARD ON ONE SIDE AND ALUMINUM FOIL

HH-I-1972/4, FEDERAL SPECIFICATION, INSULATION BOARD, THERMAL, POLYURETHANE OR POLYISOCYANURATE FACED WlTH GYPSUM BOARD ON ONE SIDE AND ALUMINUM FOIL OR ASPHALT/ORGANIC FELT ON THE OTHER SIDE OF THE FOAM (12 AUG 1981)., This specification covers the requirements for faced thermal insulation boards composed of rigid cellular polyurethane or polyisocyanurate faced to a gypsum board on one side of the foam and aluminum foil or asphalt/organic felt facing on the other side of the foam. This specification does not cover cryogenic applications. For intended use see 6.1 of HH-I-1972/GEN.