Weather barriers keep outside weather out and conditioned interior air in. A weather barrier is part of the wall assembly; it prevents the passage of moisture, rain, and wind through critical areas of the walls and roof and protects vulnerable building components from deterioration. Water and air are driven through leakage points by wind, gravity, and capillary forces. When moisture infiltrates the building envelope, the wood begins to rot, mold begins to grow, steel corrodes, and insulating R-values decline. Additionally, air migration through wall assemblies decreases the energy efficiency of the building. They are becoming increasingly important in the building and construction industry. With recent concerns over controlling the growth of mold within building walls, weather barriers have begun to perform an important preventive role. A properly sealed building is crucial for eliminating water infiltration. It also prevents energy losses caused by air leakage, but incompatible products and installments can hurt the system’s performance. It can even lead to costly repairs. With our extended warranty program, all our customers have assured years of hassle-free service.