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08-09-2009, 05:51 AM #7
Doug:
The IRC code I posted doesn't reference the 4"
I think it should, as it protects against water runoff and gas fumes
LewLew Buttery
Castle Golden Design - "We make dreams visible"
Lockport, NY
716-434-5051
www.castlegoldendesign.com
lbuttery at castlegoldendesign.com
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