Tyvek house wrap is a type of breathable membrane used for walls that provides moisture protection for timber, steel, and concrete walls. It is a non-woven, breathable structure that helps keep air and water out while letting water vapor escape, which can contribute to improved building durability by helping to protect homes against damaging wind and rain that can penetrate the exterior cladding. Tyvek house wrap is engineered to keep homes cool in the summer, warm in the winter, and dry all year round. It is lightweight and easy to handle, and its unique non-woven structure controls air flow and water intrusion. Tyvek house wrap can also reduce home energy bills by controlling air flow and water intrusion, which helps insulation work better, allowing the HVAC system to work more efficiently. It is not a vapor barrier, but it is highly breathable, allowing moisture vapor to pass through it. The manufacturer recommends only taping the Tyvek HomeWrap seams, as the house needs some airflow to avoid moisture build-up within the home.