The insulation that lines your walls of your home can save you a lot of money on your utility bills.
Insulation acts as a barrier to keep the hot or cool air you pump into your house inside the house and keep the hot or cool air outside of the house. However, if you live in a old house, there may not be any insulation in your walls.
There are several tools you can use to check your walls for insulation, and this article will guide you through the process.
One method is to unhook the light switch cover on your wall, thus opening a small hole in the wall through which you can look for insulation.
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