I purchased an old lake cottage (Wisconsin) that has been “added” onto over the years. I will be converting the attached garage to living space. Part of the home has a crawl space with wood joists, other parts on cement slab. Gutting out and redesigning entire home. Intend to have Gypsum floor poured to level all out. Mostly 3/4″ thick but garage area space will require about 4″. On humid days I have sweating on some of the concrete slab floors though not in garage. So I suspect improper or non existent vapor barriers. Thinking I will put down 3/4″ Rigid foam and a 6ml vapor barrier before having them do the Gypsum. Is that the right approach or better options? Will vapor barrier between the concrete and Gypsum likely solve the moisture problem? In the garage area I could do 2″ rigid if that is better. I also am considering putting in electric concrete slab floor heat in a couple of rooms, not intended for room heating but just to warm up the floor area some. Seems like a good time to do that though not sure if benefits justify costs. (Can not afford to do actual hydronic heat). Thank you in advance for any info!!
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