Vapor barriers inside AND outside of unvented crawl space?
I have been trying to figure something out for days. Maybe you can provide some clarity.
If I am building an unvented crawl space, and have an interior vapor barrier on the ground and sealed to the stem wall, with rigid insulation over it, do I need to have a vapor barrier on the EXTERIOR of the foundation wall, as well?
Do I even need to brush asphalt on the exterior CMU or do I want it to breathe?
Thanks so much!
Posted Feb 7, 2013 4:43 PM ET
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