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Inspect And Seal Windows

Windows are notoriously terrible for keeping in warm or cool air. And while manufacturers have gotten better at building more energy-friendly windows over the years, it's still worth inspecting the windows inside your home to see if they're a drain on your heating and cooling. To do so, just feel around your window sill to see if you can detect any cold air coming through. If you can, then it might be time to break out the caulk gun.

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Luckily, it's pretty simple to seal around your window, and all you usually need is a caulk gun and some caulk or another type of sealant. After you're done, feel around again to make sure it's completely sealed.