The North American Insulation Manufacturers Association (NAIMA) reported that about 90% of U.S. single-family homes are under-insulated. The NAIMA estimate is based on the 2009 Residential Energy Consumption Survey, published by the U.S. Energy Information Administration.
A NAIMA official said that because homeowners don’t see insulation, they tend to ignore its importance. Insulation has a "three times greater impact on the average home’s energy and comfort than windows or doors," he said.
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