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DAY

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Posts:4

02/01/2002 7:20 AM
Here's one for those in the know. My poured slab will be 22" above the footing on fill within the completed ICF system. I'm on fairly wet lowland. Should I waterproof the inside foam as well as the outside below grade?

Ian ICF Builders User is Offline

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Posts:612

02/01/2002 3:18 PM
YES. Water will wick up the wall otherwise. You may want to seal the construction joint between the slab and wall as well. You may also want to install a drain field under the slab that is tied to a sump well and pump if the potential for extreme amounts of water is possible.

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