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Originally Posted by speede5
Most likely what drives our requirements as well. Pilings would alleviate that.
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Apparently there is another way around it as well.
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In cold climates, a slab-on-grade can easily avoid frost heave with the simple addition of skirt insulation, which protects the perimeter of the footing so that it will never be subjected to the freeze/thaw cycle, and instead remain close to the relatively constant 8 -10 degrees Celsius temperatures of the earth.
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https://www.ecohome.net/guides/2279/...chnical-guide/