AVS Special Member
Join Date: Dec 2008
Location: L.A. - Lower Alabama
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Checked with our local inspector and he indicated that in this part of the country (Alabama) vapor barriers are not required in a basement. This seems consistent with what I've seen in the basement so far as the humidity down there has been the same or lower than the rest of the house.
However, I've read so many differing opinions online that I'm a little concerned about this vapor business. The walls were not framed with enough space behind them for ridgid insulation, or I would go that route. So, my question is, what have you guys done in your theaters to address potential vapor intrusion.
In case it's important, our basement has a sprayed on waterproofing membrane on the exterior plus a dimpled membrane plus a drainage mat. I would think we would have very little moisture coming from the ground.