Save energy and seal air leaks by weather stripping exterior doors.
How do you know if you need to weather strip? If you can see any amount of light between the door frame and the floor, weather stripping should be applied to eliminate energy waste. This DIY energy-saving project is relatively easy and inexpensive depending on the type of materials selected.
The most common weather stripping material is self-adhesive foam strips, although rubber, vinyl, metal, or a combination of materials may also be used.
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SOURCE: Department of Energy