Insulation can dramatically block the transfer of heat through this layer, as well as help control for sound. When insulating your home, it’s advisable to get the R-value recommended by the Department of Energy or that specified by your area’s local energy code, according to the North American Insulation Manufacturers Association. R-value is simply a measure of thermal resistance; the bigger the R-value, the more effective a home’s insulation will be. To select high-quality insulation that will wear well for years in your geographic area, ask the local gas or electric utility company for their advice on good insulation for your location. In the following pages, we’ll discuss some of the various forms of insulation they might recommend
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