Products / Duro-Guard ISO Foil

Duro-Guard ISO Foil is a closed-cell polyisocyanurate roof insulation board with integrally laminated foil facers, approved for direct application to steel decks in Duro-Last mechanically attached and metal retrofit roof systems. It is offered as ASTM C1289 Type II, Class 1, Grade 2 (20 psi) or Grade 3 (25 psi). The data sheet states it is not a vapor retarder substitute, that Duro-Last membrane must not be adhered to it and that it is not a substrate for the Duro-Bond system, and lists UL 1256, UL 790 and UL 263 classifications and FM 4450 and 4470 approvals.