Question: We would like to enclose a porch with an existing slab, but don’t know if there is a vapor barrier below the slab. Is there a way to create a vapor barrier?
Answer: We recently came across a product called Concrete Treat that is applied to the top of the slab like paint. It seals the pores in the concrete which provides a vapor barrier that is less permeable than plastic that is 6 mil thick. You can learn more about it and order it by searching for Concrete Sealer and Blanket.
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