Understanding Key Air Barrier Terms: Part 2
(WorldNews Environment)

In the last `Air Barrier Terms` blog post, we defined some of the most common (and often confusing) terms relating to air barriers. Here are a few more commonly used terms. Vapor permeance This refers to the amount of water vapor that can pass through a material. Allowing some vapor to pass through an air barrier can be beneficial in certain situations, allowing vapor inside of a building to pass through, minimizing the potential negative effects of moisture collecting in wall assemblies....