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How to Repair an RV Roof Soft Spot: A Step-by-Step Guide

Owning an RV is a dream come true for many adventurers.

However, over time, these vehicles may develop issues, including soft spots on the roof.

A soft spot can be a cause for concern as it indicates water damage and potential structural problems.

In this comprehensive guide, we will walk you through the process of repairing an RV roof soft spot, ensuring your vehicle remains in optimal condition for your future travels.

Understanding RV Roof Soft Spots

Before we delve into the repair process, let’s first understand what RV roof soft spots are and what causes them.

Soft spots are areas on the roof that feel spongy or weak when stepped on.

They typically occur due to water infiltration and rotting of the underlying structure, such as the plywood or insulation material.

Continuous exposure to moisture can weaken the roof’s integrity, leading to soft spots over time.

Tools and Materials You’ll Need

Repairing an RV roof soft spot requires specific tools and materials to ensure a successful outcome.

Here’s a list of items you’ll need:

  1. Safety goggles and gloves
  2. Drill with various drill bits
  3. Screwdriver set
  4. Utility knife
  5. Pry bar or crowbar
  6. Hammer
  7. Wood filler
  8. Epoxy resin
  9. Fiberglass cloth or mat
  10. Roof sealant
  11. Paintbrushes
  12. Sandpaper (various grits)
  13. Putty knife
  14. Plastic sheeting or tarp
  15. Clean cloth or sponge
  16. Bucket of water and mild detergent
  17. Measuring tape
  18. Caulking gun
  19. Roofing nails or screws
  20. Ladder or scaffolding (if necessary)

Gather all the necessary tools and materials before you start the repair process to avoid any unnecessary interruptions.

Assessing the Damage

The first step in repairing an RV roof soft spot is assessing the extent of the damage.

This will help you determine the scope of the repair and the materials required.

Here’s how you can assess the damage:

  1. Inspect the Roof: Carefully climb onto the roof of your RV and visually examine the entire surface. Look for areas that appear discolored, sagging, or feel soft when pressed. Mark these areas using masking tape or a marker for easier identification during the repair process.
  2. Check the Interior: Go inside your RV and examine the ceiling for signs of water stains, discoloration, or bulging. These signs may indicate soft spots on the roof. Pay close attention to areas near vents, skylights, and any other openings on the roof.
  3. Tap Test: To further identify soft spots, use a small rubber mallet or the back of a screwdriver handle to gently tap the roof surface. Listen for differences in sound, as soft spots tend to produce a dull thud compared to solid areas.

By thoroughly assessing the damage, you’ll be better equipped to proceed with the repair process effectively.

How to Repair RV Roof Soft Spot

Now that you have identified the soft spots on your RV roof, it’s time to get down to the repair process.

Follow these step-by-step instructions to fix the soft spots and restore the structural integrity of your RV roof:

1. Gather Safety Equipment

Before you begin any repair work, ensure your safety by wearing goggles and gloves. Safety should always be a priority during any DIY project.

2. Prepare the Work Area

To prevent further damage and protect the interior of your RV, cover the surrounding area with plastic sheeting or a tarp. This will catch any debris or falling materials during the repair process.

3. Remove the Damaged Area

Using a utility knife or a saw, carefully cut away the damaged section of the roof. Be sure to cut through the top layer, insulation material, and plywood until you reach solid and undamaged areas.

4. Dry the Area

Once the damaged section is removed, allow the exposed area to dry completely. Use a fan or dehumidifier to expedite the drying process. It is crucial to ensure there is no moisture left, as it can lead to further problems down the line.

5. Replace the Plywood

Measure the dimensions of the removed section and cut a new piece of plywood to fit. Carefully insert the new plywood into the vacant space and secure it in place using roofing nails or screws.

6. Apply Epoxy Resin

Using a paintbrush, apply a layer of epoxy resin to the newly installed plywood and the surrounding areas. This resin will help seal the wood and provide added protection against moisture.

7. Reinforce with Fiberglass

Cut a piece of fiberglass cloth or mat slightly larger than the repaired area. Apply a layer of epoxy resin to the plywood and carefully lay the fiberglass cloth on top. Continue applying resin until the cloth is fully saturated and adheres to the plywood.

8. Smooth the Surface

Once the resin has cured, sand down any rough edges or imperfections using sandpaper. Start with a coarse grit and gradually move to finer grits for a smooth finish. Wipe away any dust with a clean cloth or sponge.

9. Apply Roof Sealant

Using a putty knife or caulk gun, apply a generous amount of roof sealant to the repaired area and the surrounding seams. This will create a watertight barrier and protect against future leaks.

10. Allow for Proper Curing

Give the sealant ample time to cure according to the manufacturer’s instructions. Avoid any foot traffic or exposure to moisture during this period to ensure the best results.

Frequently Asked Questions (FAQs)

How long does it take to repair an RV roof soft spot?

The repair duration varies depending on the size of the damaged area and the curing time required for the materials used. On average, the repair process may take anywhere from a few hours to a couple of days.

Can I repair an RV roof soft spot myself, or should I hire a professional?

Repairing an RV roof soft spot can be done as a DIY project if you have the necessary tools and skills. However, if you’re not comfortable with DIY repairs or the damage is extensive, it’s advisable to seek professional assistance.

How can I prevent RV roof soft spots in the future?

Regular roof inspections, prompt repair of any leaks, and proper maintenance can help prevent RV roof soft spots. Ensure proper sealing around vents, skylights, and other openings, and keep the roof clean and free of debris.

Can I walk on the repaired area after it has cured?

Yes, once the repair has fully cured, you can walk on the repaired area with confidence. However, it’s always a good idea to exercise caution and distribute your weight evenly to avoid putting excessive strain on the roof.

What should I do if the soft spot returns after the repair?

If the soft spot reappears or worsens after the repair, it may indicate an underlying issue, such as continued water infiltration. In such cases, it’s best to consult a professional to assess and address the problem.

Are there any temporary fixes for an RV roof soft spot?

While temporary fixes can provide a short-term solution, they are not recommended for long-term roof repairs. It’s best to address the issue properly to prevent further damage and ensure the safety of your RV.


Repairing an RV roof soft spot is a critical task to maintain the structural integrity of your vehicle.

By following the step-by-step guide outlined in this article, you can confidently tackle the repair process and restore your RV’s roof to its original condition.

Remember to prioritize safety, gather the necessary tools and materials, and take your time to complete each step with precision.

With proper care and maintenance, you can enjoy many more adventures in your trusty RV without worrying about soft spots on the roof.