There are 30 million homes in the U.S. and Canada with dirt-floored, vented crawl spaces. They were all built according to building codes, yet they are highly dysfunctional. They make homes uncomfortable, unhealthy and cost homeowners a lot of money by significantly increasing their heating and cooling expenses.
In this video, building scientist Larry Janesky explains how crawl spaces work, why they cause so much energy waste and why fixing a dirt-floored, vented crawl space is one of the "Ideas Worth Sharing."
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