PP825-21 FLANGE WROT 1IN OD

Stops winds from robbing homes of their energy and insulation values. Reduces the air exchange that occurs in homes as air moves through the wall cavities. Tiny micro perforations also allow the release of water vapor to help prevent any moisture condensation. Water-resistant air infiltration barrier is lightweight and easy to install, yet is strong and durable which reduces jobsite waste. 5 mil thickness.