CertainTeed MemBrain 9 ft. W X 100 ft. L X 2 mil Air Barrier and Smart Vapor Retarder Roll 933 sq ft

Protect your home from moisture and mold with CertainTeed MemBrain 9 ft. x 100 ft. Smart Vapor Retarder Roll. Covering 933 sq ft, this patented air barrier adapts to seasonal humidity—blocking moisture in winter and allowing walls to breathe in summer. Ideal for use with un-faced insulation, it installs like standard poly while offering advanced moisture control. Use in walls, ceilings, basements, and attics to improve energy efficiency and indoor air quality. MemBrain is the smart choice for modern construction and renovation projects that demand comfort, durability, and performance.