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How to Fix RV Fiberglass Delamination

RV fiberglass delamination is a common issue faced by many RV owners.

It refers to the separation of the fiberglass layer from the underlying structure, resulting in a bubbled or warped appearance.

If left untreated, it can lead to further damage and compromise the integrity of the RV.

In this comprehensive guide, we will explore effective methods to fix RV fiberglass delamination and restore your vehicle to its former glory.

Understanding RV Fiberglass Delamination

Before diving into the repair process, let’s first understand what causes RV fiberglass delamination.

This knowledge will help you identify the root cause and prevent future occurrences.

The Causes of RV Fiberglass Delamination

There are several factors that can contribute to RV fiberglass delamination, including:

  1. Water Intrusion: Water leaks are one of the primary culprits behind fiberglass delamination. When water finds its way into the walls of your RV, it can weaken the adhesive bonds between the fiberglass layer and the underlying structure.
  2. Impact Damage: Accidents, collisions, or even minor bumps can cause delamination by separating the fiberglass layer from the structure. These impacts can break the adhesive bond, leading to bubbles or warping.
  3. Age and Wear: Over time, the adhesive used to bond the fiberglass may deteriorate, causing delamination. Additionally, constant exposure to harsh weather conditions, UV rays, and temperature fluctuations can expedite this process.

Identifying RV Fiberglass Delamination

To determine if your RV is suffering from fiberglass delamination, look out for the following signs:

  1. Bubbles or Warping: Check the exterior walls for any irregularities, such as raised areas or waves. These indicate that the fiberglass layer has separated from the structure.
  2. Soft Spots: Gently press on the walls and feel for areas that give in or feel soft. This softness indicates a separation between the layers.
  3. Cracks or Gaps: Inspect the edges of windows, doors, and seams for any visible cracks or gaps. These are often an early sign of delamination.
  4. Squeaking Noises: If you hear squeaking or creaking sounds when you apply pressure to certain areas of the RV, it may indicate delamination.

Now that we have a good understanding of RV fiberglass delamination and its causes, let’s explore how to fix this issue effectively.

How to Fix RV Fiberglass Delamination

Fixing RV fiberglass delamination requires time, patience, and attention to detail.

Here are the steps to follow for a successful repair:

Step 1: Prepare the Work Area

Before you start the repair process, ensure you have a clean and well-ventilated workspace.

Gather the necessary tools and materials, including:

  • Safety goggles and gloves
  • Respirator mask
  • Sandpaper (various grits)
  • Fiberglass repair kit
  • Epoxy adhesive
  • Fiberglass cloth
  • Bonding agent
  • Plastic squeegee
  • Utility knife
  • Paint and primer (optional)

Step 2: Remove Damaged Fiberglass

Begin by carefully removing the damaged fiberglass using a utility knife.

Take your time and be cautious to avoid further damage.

Remove any loose or delaminated sections, creating a clean and even surface.

Step 3: Sand the Area

Use sandpaper to sand the exposed area, creating a smooth surface for the repair.

Start with a rough grit sandpaper and gradually move to finer grits.

This process helps the new fiberglass adhere properly to the underlying structure.

Step 4: Apply Bonding Agent and Fiberglass Cloth

Apply a bonding agent to the sanded area, following the instructions provided with the product.

Once the bonding agent is applied, carefully lay the fiberglass cloth over the damaged section.

Ensure the cloth covers the entire area and overlaps onto the surrounding undamaged fiberglass.

Step 5: Apply Epoxy Adhesive

Mix the epoxy adhesive according to the manufacturer’s instructions.

Apply a thin layer of epoxy adhesive over the fiberglass cloth, saturating it completely.

Use a plastic squeegee to remove any excess adhesive and ensure even distribution.

Step 6: Allow Curing and Sanding

Let the epoxy adhesive cure as per the recommended curing time provided by the manufacturer.

Once cured, use sandpaper to smooth out the repaired area.

Start with a rough grit and gradually move to finer grits for a seamless finish.

Step 7: Paint and Prime (Optional)

If desired, you can paint and prime the repaired area to match the rest of your RV’s exterior.

Choose an appropriate paint and primer that are compatible with fiberglass materials.

Follow the manufacturer’s instructions for proper application.

Congratulations! You have successfully repaired your RV fiberglass delamination.

Remember to take preventative measures to avoid future delamination issues.


Can I fix RV fiberglass delamination myself?

Yes, with the right tools, materials, and guidance, you can fix RV fiberglass delamination yourself.

However, it requires careful attention to detail and patience.

How much does it cost to repair RV fiberglass delamination?

The cost of repairing RV fiberglass delamination can vary depending on the extent of the damage and whether you choose to do it yourself or hire a professional.

DIY repairs can range from $100 to $500, whereas professional repairs can cost upwards of $1,000.

Can I prevent RV fiberglass delamination?

While you can’t completely eliminate the risk, you can take preventive measures such as regular inspections, addressing water leaks promptly, and storing your RV in a covered area when not in use.

Are there any temporary fixes for RV fiberglass delamination?

Temporary fixes for RV fiberglass delamination are not recommended, as they may not address the underlying issue and could worsen the problem.

How long does a fiberglass repair typically last?

A properly repaired fiberglass delamination can last for many years if done correctly.

Regular maintenance and inspections can help prolong its lifespan.

Can I claim insurance for RV fiberglass delamination repairs?

It depends on your insurance policy.

Contact your insurance provider to check if RV fiberglass delamination repairs are covered.


RV fiberglass delamination can be a frustrating problem, but with the right knowledge and tools, it can be effectively repaired.

By following the steps outlined in this guide, you can restore your RV’s exterior and enjoy many more adventures on the road.

Remember to prioritize regular maintenance and inspections to catch any potential delamination issues early on.