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How to Caulk Storm Windows

Applying caulk to storm windows can help create a barrier that prevent water, wind and dirt from enter the house through the window crevices. It can also help hold the storm windows in place. Caulk can be easily applied to most types of storm windows using a caulking gun.


  1. Use a plastic chisel to scrape out any old caulk that may be in or around the storm window. This will help create a clean and smooth surface for the new caulk.

  2. Use a wet sponge or cloth to wipe the area clean. Scrub the area to remove any stuck-on dirt or caulk.

  3. Use a clean dry cloth to dry the window and any other wet or damp areas around it. If the area is not completely dry, the caulk will not stick to it well.

  4. Place the tube of caulk inside the caulking gun. The tube will either slide in top of the gun or in from the back. Remove the tip of the caulk tube and use a pin or knife to poke a hole in the tip of the tube.

  5. Place the tip of the caulk gun inside the edge of the window frame and pull the trigger to apply the caulk to the window. Apply to caulk to the entire outer edge of the window. Move the gun in a smooth, straight line, keeping even pressure on the caulk gun trigger. Do not apply caulk to the bottom edge of the window as this can prevent the window from opening and closing properly.

  6. Dip your finger in alcohol and rub it along the caulk to smooth it down, make it even and press it into the rim of the window. Dip a cloth in the alcohol and use it to clean any excess caulk that has dripped on the to window.