Products / GenFlex NB ISO Polyiso Insulation Board

GenFlex NB ISO is a nailable composite roof insulation board with a closed-cell polyiso foam core laminated to a glass-reinforced mat facer on one side and 7/16 in oriented strand board on the other. Boards are 4 ft x 4 ft or 4 ft x 8 ft, 1.5 in to 4 in thick per the data sheet, with 20 psi compressive strength standard and 25 psi on request. It meets ASTM C1289 Type V and is listed for use under EPDM, TPO, modified bitumen and metal roofing systems. When used with hot bitumen, the bitumen temperature is limited to 450 F.