First discovered by a DuPont researcher in 1955, Tyvek has since become an icon in the building materials industry. A tough spun-bond olefin fiber product, Tyvek is stronger than paper and more cost-effective and versatile than fabrics. The use of Tyvek as a building wrap increases durability and energy-efficiency, as well as providing an essential line of defense against liquid water. Tyvek building envelope products meet or exceed codes, help extend the life of a building, and help reduce fossil fuel consumption. Because Tyvek is highly permeable, it reduces the risk of condensation damage, wood rot, and mold growth by allowing water vapor to escape. Additionally, Tyvek is flame, chemical, UV, and tear resistant.