Perfect for structures with cathedral ceilings, glue lam, post & beam construction and conditioned attic spaces, they help insulate against heat drive into the living space/conditioned space under the roof while serving as a nailable base. In addition, they exhaust excess moisture before it can condense in the deck or roofing system. These panels can be installed on top of structural wood or steel sloped roof decks (Contact GAF for other acceptable decks).
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