I’m sure this has been covered and it’s in here somewhere, but I can’t find the exact scenario, I have a customer who wants reclaimed rigid foam installed on the ceiling of a pole building, and metal over it. Roof is metal, underside is not exposed but has a white fabric? Some kind of underlayment. The building won’t be constantly conditioned, just a wood stove for occasional winter use as a shop and storage and fans periodically in the summer. Question is I see people put plastic up and some who don’t, am I wrong to think that in this case of just occasional heat, that air sealing and moisture barriers will cause problems. Climate is central PA we were -2 afew days ago and can hit 100 in the summer. Thanks in advance if anyone can direct me to an article I missed or has more experience with these buildings