Manufactured with a heavy-duty, double-coated, non-organic glass facer, Firestone RESISTA™ polyiso insulation board is compatible with all fully-adhered and mechanically attached single-ply, cold-applied and self-adhered modified bitumen membranes.
RESISTA polyiso is an economical choice offering exceptional protection against fire, wind and mold. With thicknesses varying from 1-4 inches, RESISTA polyiso uses Firestone’s proprietary ISOGARD™ foam technology to create an impressive insulating value per inch which can translate into significant energy savings. While other manufacturers may require up to 3.1″ insulation over combustible decks, RESISTA polyiso is the first 1″ insulation board with a UL Class A rating for fire resistance. The double coating of non-organic facing material on both sides of the insulation board also meets ASTM D 3273 standards for mold resistance.
In addition to fire, wind and environmental protection, RESISTA polyiso is easy to cut and handle which can lead to reduced installation times and labor costs. This environmentally sustainable product also contains recycled content and can contribute to overall LEED® certification for energy optimization and material resource credits.