Products / Duro-Guard ISO III CG

Duro-Guard ISO III CG is a closed-cell polyisocyanurate roof insulation board with integrally laminated coated-glass facers, made in flat and tapered 4 by 4 foot panels for Duro-Last mechanically attached, adhered, Duro-Bond and metal retrofit roof systems. It is offered as ASTM C1289 Type II, Class 2, Grade 2 (20 psi) or Grade 3 (25 psi), with taper slopes of 1/8, 1/4 and 1/2 inch per foot. The data sheet lists UL classifications and FM 4450 and 4470 approvals, and states that in some UL assemblies it can give a Class A or B rating over a combustible deck without a separate fire-rated board.