Vapor retarder in cold climate yes/no?
(Here in south dakota we are not required to follow a code. I can make my walls out of grilled cheese if i so desire)
I’m having a company reside my zone 6a freezing home. its a 1953 ranch house with 2×4 walls. it’s going to be:
Studs with fiberglass batts
2″ of eps
tyvek drain something rainscreen
Builder suggested a vapor barrier that encourages vapor to move to the exterior and not so much inside. I assumed it needs to dry towards the inside easily because of eps? should I drop it, no vapor anything?
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