Condensation in the seams.
So I was working with a client last year to remodel their attic space. So we took the strategy to insulate the knee wall by using 2″ foil faced polyiso foam board on the attic side, R-15 batt with a kraft paper face in the cavities and drywall on the conditioned side.
The homeowner is just getting around to sealing the seams in the foam board and is noticing condensation in between the pieces of foam. It is 30 degrees out today in zone 5a. So I am trying to assure the client that he is seeing this condensation because the seams have not been sealed and he should not have a problem once they are sealed. He is primarily worried because a contractor told him with the foil facing he will get condensation on the foam board. Any advise on how to put the customer at ease?
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