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How to Recaulk Windows

Caulk between your windows and their frames stops air leakage and moisture penetration. Although it’s quite durable, it eventually deteriorates and must be reapplied. Learning how to recaulk windows involves selecting the right type for your application.

Select an exterior-grade caulk that can withstand the elements. Consider the types of materials that caulk bonds with the best. Wooden, aluminum, or vinyl windows and siding will respond best to caulk meant for those materials. Some caulk needs to be painted and other types are fine without paint. Take this into account to determine whether or not you intend to apply fresh paint to the window frames.

Steps for How to Recaulk Windows

  1. If your window is on a second or third story, position the ladder so that it is on stable ground.
  2. Scrape away all of the old caulk and loose paint with a putty knife.
  3. Repair any damage to the window frame, if present.
  4. Wash window frame area to prevent dirt particles from interfering with caulk adhesion.
  5. Once work area is dry, you can begin caulking.
  6. Load tube into caulking gun.
  7. Cut off about 1/4 inch from the tube tip at a 45-degree angle.
  8. Puncture interior seal of caulk tube with a nail.
  9. Position the tip at the corner of the window along the seam where it meets the frame.
  10. Apply an even bead of caulk around the entire window.
  11. Wipe the caulk bead smooth along the seam with a rag.
  12. Allow to dry fully before applying any paint.

Tools & Materials

Before staring your project, confirm that the weather will be dry and at least 45 degrees. Caulk needs this minimum temperature for at least 24 hours to cure.
  • Ladder
  • Putty knife
  • Caulking gun
  • Utility knife
  • Rags
  • All-purpose cleaner

Ask PJ Fitzpatrick for Help

Learning how to recaulk windows will not accomplish much if the window frame is damaged. The home repair experts at PJ Fitzpatrick can quickly and affordably replace rotted wood or trim around the exterior of your windows if necessary. Homeowners turn to us for thousands of repair jobs every year. Ask us for a window repair or replacement estimate today.

Need help with this project?

We have trained professionals that can help. Contact us today. 1-877-246-4354

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