The HS CoverBoard by Atlas Roofing was designed for use in virtually every type of flat-roof application. This new, high-strength product provides the insulating power of polyiso, the strength of a durable cover board, and the stability of a lightweight coated-glass facer. It keeps insulation secure beneath the roofing membrane and resists damage from foot traffic and heavy loads. The sturdy compressive strength of ACFoam® HS CoverBoard is created by closed-cell polyiso foam, which is laminated to a durable and dimensionally stable coated-glass facer. For more information, visit