Products / Flex ISO III Roof Insulation

Polyisocyanurate roof insulation with a closed-cell foam core bonded to inorganic coated glass facers, made in flat 4 by 8 foot and 4 by 4 foot panels from 1.0 to 4.0 inches (LTTR 5.7 to 23.6 in the published table) and in tapered 4 by 4 foot panels at 1/8, 1/4 and 1/2 inch per foot slope, at 20 psi (Grade 2) or 25 psi (Grade 3). The data sheet lists ASTM C1289 Type II Class 2, CAN/ULC-S704, UL 1256, UL 790, UL 263 and UL 1897 classifications, FM 4450/4470 approval and Miami-Dade County approval, for use under BUR, modified bitumen, metal and single-ply systems. It states Class A ratings can be achieved when the total insulation thickness is at least 3.0 inches placed directly on a combustible deck of 1/2:12 maximum slope.