Leaky RV Window? Here is the fix…

Much like the window and door frames on your house, the window frames of an RV are sealed with caulk. Over time, caulk eventually decays, causing a leak. With their thinner walls, these leaks are much more apparent on an RV. They can also be much more destructive to the plywood construction used in many RV models. You should act to replace the caulking on the window as soon as you become aware that the window is leaking.

Step 1

Inspect the caulking around the perimeter of the RV window frame. Wherever the caulk is cracked, crumbling or a gap has opened between the bead of caulk and the window frame is a potential leak.

Step 2

Remove the damaged caulk from the RV window frame. Cut and pry up the bead of caulk with a disposable razor blade or a putty knife, and pull as much of the bead out by hand as possible. Remove the remaining caulk by scraping it out with a razor.

Step 3

Clean the RV window frame seams. If there are any major bits of old, damaged caulk still in the seam, break it down and remove it with an acetone-based solvent. Then wash out the seam with car wash detergent, water and an old rag. Allow the clean-up to dry before proceeding.

Step 4

Caulk the RV window frame with RV sealant. Apply steady pressure to the caulking gun’s trigger as you slowly draw a constant bead of caulk around the window frame, filling up the seam. Gently remove any excess caulk with the razor blade.

Things You’ll Need:

  • Disposable razor blades
  • Putty knife
  • Acetone-based solvent (if possible)
  • Car wash detergent
  • Old rags
  • Caulking gun
  • RV sealant
If your know your leak is a bigger headache then a simple drop or two of water, do not hesitate to contact your Central PA RV Dealership for service.  Our fully staffed RV service department has well over 100 years of combined RV Service experience.  Give us a call at 800-722-1236 for all your travel trailer and fifth wheel needs.
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