How can I insulate my deck footings? How can I insulate my deck footings?

The easiest way to insulate deck footings is to place a foam board, before inserting the footing, into the deck footing hole you dig. After the insulation board is in position, place the deck footings as usual. This kind of insulation protects the footings, and insulates them from the soil or the earth below it. Make sure that the deck footings are sunk to a level that is much lower, compared to the frost line. This depth varies, according to the climatic condition of the place where you reside. After inserting the foam board, cover it with a thin sheet of waterproof membrane or plastic, so that the insulation lasts longer.

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