Effective air sealing comes with workmanship. No matter what brand of housewrap you choose, you will be wasting your money unless you install it carefully. Getting the installation right is not hard, but it requires a basic understanding of how housewrap works. Detailed installation instructions can be found on manufacturers’ Web sites and often at the lumberyard or home center where housewrap is purchased.
07 25 00 Weather Barriers
An air barrier/vapor diffusion retarder attempts to combine water vapor diffusion and air movement control with one material. This type of material is most appropriate for southern climates where keeping humid outdoor air from entering the building cavities is critical during the cooling season.
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.