A non-woven, breathable structure that stands apart from other types of house wraps, Tyvek HomeWrap promotes drying in wall systems and helps insulation perform closer to its R-value. The original house wrap, incorporates unique material science that helps keep air and water out, while letting water vapor escape. As a result, it can contribute to improved building durability by helping to protect homes against damaging wind and rain that can penetrate the exterior cladding. Tyvek HomeWrap 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’s a house wrap engineered to keep homes cool in the summer, warm in the winter, and dry all year round.