The do it yourself resource for homeowners from home improvement professionals.

How to Caulk Windows

If your windows are old, that means they’re sporting old caulk that’s likely not doing its job of keeping your windows properly sealed. Luckily, applying a fresh layer to your windows is an easy job and in this how-to, our window experts explain how to caulk windows:

  1. First, you’ll want to remove all of the old caulk from around your windows.
  2. Use your putty knife or scraper to loosen and remove the old caulk.
  3. Then, wipe down the area with warm water and mild soap to make sure all of the old caulk is gone.
  4. Let the area dry, then load your tube of caulk into your caulk gun.
  5. Snip the tip off of the caulk tube to form a small hole.
  6. Test the size of the bead and snip more off of the tube if you need a bigger bead.
  7. In one smooth, continuous motion, squeeze a bead of caulk along the cracks and gaps around your window. (If you need a more steady hand, rest your arm on the wall.)
  8. After that, use your craft stick to smooth the caulk down and then let dry.
  9. Continue caulking all of the cracks between the window trim and the siding to eliminate drafts and eliminate an entrance for insects.
  10. Once you’re finished, clean your caulk tube off with a damp rag to prevent it from getting clogged.

Tools & Materials

  • Putty Knife/Scraper
  • Warm Water, Mild Soap
  • Caulk Gun
  • Caulk
  • Flat Craft Stick
  • Damp Rag

At P.J. Fitzpatrick, we’re experts in home repairs. We’ve been providing quality service to homeowners in Delaware, Pennsylvania, Maryland, and New Jersey since 1980. If you’re having trouble with your DIY window caulking or you’d rather have a professional do it, don’t hesitate to contact us. We’d be happy to help.

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