Latest / Architect Exam Podcast
073 - Vapor Barriers Explained: Water, Air, and Moisture in Walls
Vapor barriers, air barriers, and water barriers each do a completely different job inside your wall assembly, and mixing them up is one of the most common mistakes on the ARE.
In this episode, we break down the three barrier types that protect your building envelope from moisture damage. You'll learn how weather resistive barriers and drainage planes keep bulk water out, and why air leakage actually carries far more moisture than vapor diffusion.
We walk through perm ratings, the three classes of vapor retarders, and the warm-side rule for vapor retarder placement by climate. We also cover…
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