TRI-BUILT® Woven house wrap is a strong, durable woven polyolefin fabric with a micro-perforated coating that helps control the transfer of water-vapor and reduces air infiltration. House Wrap is a critical component in protecting the building envelope by controlling air movement and the transfer of moisture, creating a healthier and more energy-efficient structure. The engineered woven fabric construction of TRI-BUILT® Woven house wrap provides exceptional strength, durability and lightweight handling.