Another term for house wrap is Air Infiltration Barrier (AIB). Preventing air leakage and weather damage are the two main functions of all house wraps. Preventing air leakage is the key to energy efficiency. All house wraps must meet industry standards requiring a high degree of air infiltration resistance, and Typar exceeds these standards on both wall section and whole-house testing. In addition, tears and nail holes can greatly affect air infiltration; unlike some other house wraps, Typar is exceptionally resistant to tearing and puncturing, which provides extra assurance of an air-tight structure.