Certainteed 416.5 sq. ft. Continuous Air Barrier and Smart Retarder 50 ft. L x 8 ft. W

CertainTeed MemBrain Air Barrier and Smart Vapor Retarder is the go-to solution for your home or business when you need to keep the wall cavity dry. MemBrain’s technology helps prevent mold, which is unlike traditional vapor retarders that can’t adapt and sense humidity changes. The advanced sensing feature of this MemBrain vapor barrier allows it to adjust permeance to varying humidity throughout the year. In the winter, the CertainTeed air barrier prevents moisture vapor from entering the wall cavity. It allows any moisture buildup in the wall cavities to escape during the summer. This vapor retarder installs like poly but with added moisture protection. A one-of-a-kind patented moisture barrier for usage in walls, ceilings, and basements.