Things You'll Need:
- Ladder
- Plank of plywood
- Putty knife
- Wire brush
- RV caulk tubes
- Caulking gun
- EPDM tape
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Step 1
Inspect the areas around the windows (not the windshield), door frames, openings in the roof (like skylights), and wherever the sidewall panels of the RV meet. You will need a ladder for the RV roof, and should lay out a plank of plywood when you stand on the roof to do your inspection, since this will spread your weight over a greater area.
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Step 2
Pry out the old caulking with a putty knife. Some badly degraded caulk might be crumbling and need to be scrubbed out with a wire brush. Take all of the bad caulk out of the seam plus one extra inch into the good caulking, should there be any.
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Step 3
Fill in the roof seams where you removed only part of the caulk and all window and door seams with fresh RV caulking. Use a caulk gun, and apply the caulk with slow, steady pressure on the trigger.
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Step 4
Cover roof seams where all the caulk was removed with EPDM tape. Peel back the plastic film covering the adhesive side three to six inches at a time, and gradually lay and press the tape over the seam until the entire seam is covered. EPDM tape forms a better seal and longer-lasting bond that caulking.
