Whether the insulation is made from shredded denim, hemp or sheep’s wool, alternative insulation can not only save homeowners money, but also help the environment.

Reducing energy costs is one of the most important factors in selecting insulation. In cold weather, insulation is used to keep the warm air in. In warm weather, it keeps the hot air out. And that’s important because HVAC systems are responsible for roughly 44 percent of all the energy used in a home [source: Pennock]. But the right insulation can reduce an energy bill by 10 to 30 percent [source: Pennock].

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