Guide Specification - Siplast

2.Polyisocyanurate Tapered Roof Insulation: Tapered panels and standard fill panels composed of a closed cell, rigid polyisocyanurate foam core material, integrally laminated between glass fiber reinforced organic facers[polymer bonded glass fiber facers], in full compliance with ASTM C 1289, Type II, Class 1[Class 2], Grade 2 (20 psi)[Grade 3 ... ................
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