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Depending on where you live, if you encapsulate your crawl space, you might not need insulation at all.

Encapsulation consists in completely isolating the crawl space from outside air and the ground by lining the whole space (not just the floor) with a sturdy high-performance vapor barrier, sealing it air tight and then conditioning it with a dehumidifier or a crawl space conditioning system.

This will make the crawlspace part of the internal envelope of the house and will not only offer thermal protection by eliminating drafts and protecting ducts, it will also control moisture and related problems (mold, rot, dust mites).

Studies conducted by Advanced Energy and Habitat for Humanity report that encapsulated crawl spaces make homes in average 18% more energy efficient.

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16y ago

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