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Old Oct 12, 2012, 11:47 AM
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United States, IA, Rockwell
Joined Jul 2011
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If you use a concrete slab, use a vapor barrier under the concrete as moisture (water vapor) will move through concrete. A plus would be to put a thermal break under the slab in the form of sheet (foam) insulation. If possible some foam installed vertical about two feet deep around the perimeter of your slab will keep that area warmer. If you do this then the foam under the slab may not be needed. You will have Mother Nature trying to keep your building warm from the natural heat in the ground. If you are digging a footing below your frost line, I would absolutely insulate the perimeter. The ground will stay about 50 degrees or so helping with heat in the winter and cooling in the summer.

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Last edited by kenh3497; Oct 12, 2012 at 11:53 AM.
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