Wrapping your home in the best insulation can save money on energy.
On his website, BuildItSolar.com, retired engineer Gary Reysa posted an insulation upgrade cost-saving calculator he created. The savings depend on how hot or cold your climate is.
If you live in Orlando, Fla., you would only shave off up to $136.74 over 10 years for upgrading from an R-value of 10 to an R-value of 30 if your home is heated with natural gas, and about $256.49 if you used electricity. In Duluth, Minn., the same upgrade yields up to $3,817.33 in savings over 10 years with natural gas heat and $7,160.29 with electric heat. An R-value is a measure of the insulation material's capacity to resist heat flow.
Reysa warns that the calculator doesn't take every heat source into account, so your actual savings may not be as high as the number you get. Areas with cold climates would have the smallest discrepancies.