Moisture accumulating before vapor barrier installed.
I’m in zone 7A and built an attached garage this fall: in slab heat, 2X6 walls, Rex wrap and OSB sheeting. The in floor heat got hooked up and turned on the beginning of January at the same time I began insulating the walls with unfaced fiberglass batts and faced batts in the ceiling.
Before I got poly vapor barrier up on the inside, there was a large amount of moisture (it was frost when it was cold outside) accumulating on the inside of the sheeting behind the batts.
I found this statement about the RexWrap: Micro perforated to allow moisture vapor to escape the wall cavity while holding out bulk water intrusion.
I have put up the poly vapor barrier on the inside now but my question is: have I trapped the moisture in the wall cavity or will the moisture make its way out through the OSB and Rex Wrap?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part