How to Fix a Rotten RV Roof From the Inside

How to Fix a Rotten RV Roof From the Inside
Any time a pool of water gathers in one spot and does not receive enough ventilation to properly evaporate, rotting will occur. An RV roof will rot if unsealed holes allow rain and snow to enter the trailer. The sealing process can be as simple as caulking the area. Pay particular attention to locations where materials are stressed, such as the area of the roof that connects the body of the cab to the trailer. Such areas are more prone to roof abrasions, and leaks.


Difficulty: Moderately Challenging

Things You’ll Need:
  • Pry bar
  • Measuring stick
  • Marine plywood
Step 1
Locate the area in your RV roof that is rotten. Remove the ceiling panels with your hand.
Step 2
Remove the rotten, damaged plywood with a pry bar.
Step 3
Use measuring tape to measure the length and width of the area where the plywood was removed in Step 2. Cut a new piece of plywood based on these dimensions.
Step 4
Fit the area with new plywood. Install to the same supports and fasten with stainless-steel nails. Reinforce the nails with a sealing caulk. Use a caulk gun to apply a thin layer of caulk over each nail. Allow the caulk to dry before moving on to Step 5.
Step 5
Reinstall the ceiling panels you removed in Step 1.
Step 6
Prevent future roof damage by resealing the roof along the edge trim, around vents and at the front trim of the roof with caulk. These areas are prone to abrasions, tears, holes and other surface damage, which can lead to small to significant leaks and subsequent rotting.

Tips & Warnings

Small, superficial tears in a rubber RV roof can be repaired using an RV patch kit.
You can also use a roof patch product instead of caulk.
Always wear eye protection and a face mask to protect your lungs from irritating fumes.

Article Written By Charlie Gaston

Charlie Gaston has written numerous instructional articles on topics ranging from business to communications and estate planning. Gaston holds a bachelor's degree in international business and a master's degree in communications. She is fluent in Spanish and has extensive travel experience.

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