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Platinum Member
Join Date: Jul 2001
Location: Leave the gun. Take the cannoli.
Posts: 21,355
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Make sure you have 3-4" of stone under the slab, with good drainage, and you won't have a problem. 6mil sheeting under slab, pver stone, seams sealed. Perforated 4" PVC pipe in the stone, stubbed outside if you are in a radon area.
If you're really anal, use rubber roofing/pond liner instead of plastic. But that is a ridiculous overkill.
Still, if you leave raw steel on concrete, it will rust. Concrete absorbs moisture/humidity. Perhaps sealing it will help.
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