Products / CertainTeed FlintBoard ISO Cold

Closed-cell polyisocyanurate roof insulation board with coated glass facers, made for roof systems whose membrane is bonded with cold-applied adhesive. Panels are 4 ft x 4 ft and 4 ft x 8 ft in thicknesses from 1 in to 4.5 in, at 20 psi standard or 25 psi; a tapered version, FlintBoard ISO T Cold, is also published. CertainTeed lists it as meeting ASTM C1289 Type II, Class 2, Grade 2 (20 psi) or Grade 3 (25 psi), and as supporting UL Class A rated assemblies at 1 in thick.