Membrain 8 Ft. W X 100 Ft. L Unfaced Air Barrier and Smart Vapor Retarder Roll 8 por | ago 6, 2026It lets wall cavities dry out to help prevent mold. Not all climate zones require vapor retarders. Thickness (mil) 2 MIL. Sheet Length (ft) 100 ft. Sheet Width (ft) 8 ft. We do not accept P.O. Boxes.
