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Manufacturer's Product Description
This uniform-density fiberboard uses cellulosic wood fibers with additives to improve strength and moisture resistance. It is available in high-density versions in 1/2" and 1" thicknesses, and regular-density in 1/2" thickness. Applications include: Use under fully adhered EPDM single ply membrane (high-density only) Use under mechanically fastened roof systems Use under loose-laid ballasted roof systems