Hello all! Hoping someone can clear this up for me.
Up until recently, I was under the impression that vapor barriers always goes on the warm side of the wall. However, this Hyperfine question and video , and one question in Elif's PDD Quiz #2 say that the vapor retarder on inside face of insulation (shown in detail below for example) would work in BOTH warm and cool climates.
I am very confused how it's ok to have a vapor barrier on the inside face of insulation in a warm climate. Wouldn't the air pass through the insulation and condense inside the insulation? Thanks in advance!
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