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Platinum Member
Join Date: Jul 2001
Location: Leave the gun. Take the cannoli.
Posts: 21,385
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In NJ they should have put 4" stone, then poly, with the seams overlapped and sealed, and 4" concrete. AND A RADON VENT! which is perforated pipe, venting the stone. That is the code.
Crack is probably not a problem, no stone or radon vent is.
Per code, there should also be control joints.
Last edited by dad911; 05-12-2009 at 12:58 AM..
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