How to weatherstrip doors and windows
Jeff Hendricks • July 12, 2026

Weatherstripping doors and windows is one of the easiest ways to make your home more comfortable and lower your energy bills. Small gaps around doors and windows let outside air come in and allow heated or cooled air to escape. This makes your heating and cooling system work harder and can increase your monthly utility costs.

Person applying sealant with a caulking gun along the base of a white door frame

The first step is to find where air is leaking. On a windy day, place your hand around the edges of doors and windows. If you feel cold or warm air coming through, those areas may need weatherstripping. You can also look for visible gaps, cracks, or worn-out seals.


Before adding new weatherstripping, clean the surface well. Remove dirt, dust, and any old weatherstripping that is damaged or peeling away. A clean surface helps the new material stick better and last longer.


There are several types of weatherstripping available. Foam tape is affordable and easy to install, making it a great choice for beginners. Rubber or vinyl weatherstripping is more durable and works well for doors that are used often. Door sweeps are installed along the bottom of a door to block drafts, dust, and even small insects from getting inside.

Measure the length of each door or window before cutting the weatherstripping. Cut it carefully to the correct size and press it firmly into place. Make sure it creates a tight seal without making the door or window difficult to open or close.


Windows can also lose a lot of energy if they are not sealed properly. Apply weatherstripping around the movable parts of the window where air leaks are most common. If you notice cracks around the window frame, use a quality exterior caulk to seal those gaps. Caulk works best on fixed areas that do not move.


After installation, test your work by closing the door or window. It should close smoothly while creating a snug seal. If you still feel drafts, check for missed gaps and make small adjustments.

Weatherstripping is a simple weekend project that can make a big difference. It helps keep your home warmer during the winter and cooler during the summer. It can also reduce outside noise, improve comfort, and help your HVAC system run more efficiently.



Taking a little time to seal air leaks now can save money throughout the year. Regularly inspect your weatherstripping, especially before the colder and warmer seasons, and replace it when it becomes worn or damaged. With just a few basic tools and a little effort, you can enjoy a more energy-efficient and comfortable home.


Thanks for reading! I'm Jeff Hendricks, your trusted Realtor.

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