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Al writes from Glenview, Illinois: “Should foundation (crawl space) be insulated at an addition and floor or gravel insulated?

April 26, 2017addition AL Crawl floor foundation glenview Illinois insulated writes

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10 Posted

Al writes from Glenview, Illinois: “Should foundation (crawl space) be insulated at an addition and floor or gravel insulated?

1 Answer

0

10 Posted

If the crawlspace is unheated, insulate the top (under the floor above). We recommend using faced Fiberglas™ insulation with the facing installed toward the warm- in-winter side. If the crawlspace is heated, insulate the walls with unfaced Fiberglas insulation. If the floor of the crawlspace is dirt, cover it with a 4 to 6 mil sheet of poly.