Air and vapour barriers
What is an air barrier?
...Rigid: supported in both directions from wind pressure.
4. Durable: must last the life of the building.
5. Repairable: access for repair if damaged.
A sampling of air barrier materials and techniques:
Also known as Water Resistive Membranes (WRBs) , brand names include Tyvek and Typar. While its i...