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| Am building an outdoors sauna on a limestone skid foundation.
This is the layup plan from the top down. Ceramic Tile
(Floor box construction)
Treated 4 x 4 skids sitting on
What do you think about the poly between the insulation and the bottom layer of ply nearest the limestone foundation? Will it block ground moisture from getting into the fiberglass? Or will it hold moisture in the fiberglass? Other option is to do away with the fiberglass and bottom layer of 1/2 inch ply , leave it open and use hard foam insulation for the floor. But I don't see any foam that thick. Usually it is 1 inch or so. (In the past when I tried hard foam on an RV I had problems with it falling down after being glued in place.) Thanks for any help with this topic. |
Follow-Up Postings:
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| Long time no answer If I understand your description, vapor ingress isn't a problem because there is no differential to drive it into the 'glass. |
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