Products / Flex ISO II Roof Insulation

Polyisocyanurate roof insulation with a closed-cell foam core bonded to non-asphaltic, fiber-reinforced organic felt (GRF) facers on both sides, made in flat 4 by 8 foot and 4 by 4 foot panels and in tapered 4 by 4 foot panels at 1/8, 1/4 and 1/2 inch per foot slope. Flat boards run from 1.0 to 4.0 inches with LTTR values from 5.7 to 23.6 in the published table, at 20 psi (Grade 2) or 25 psi (Grade 3). The data sheet lists ASTM C1289 Type II Class 1, CAN/ULC 704.1, UL 1256, UL 790 and UL 263 classifications and FM 4450/4470, for use under BUR, modified bitumen, metal and single-ply systems. It states the product is backed by a Limited 20-Year Thermal Warranty, with terms on the maker's website.