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RV Fiberglass Roof Maintenance

Maintaining the fiberglass roof of your RV is essential for ensuring its longevity and protecting it from the elements.

A well-maintained roof not only keeps your RV in optimal condition but also prevents costly repairs down the line.

In this comprehensive guide, we will delve into the various aspects of RV fiberglass roof maintenance, covering everything from cleaning and inspection to sealing and repairs.

Whether you are a seasoned RV owner or a newbie hitting the road for the first time, this guide will equip you with the knowledge and tools to keep your RV roof in top shape.

RV Fiberglass Roof Maintenance

Taking care of your RV’s fiberglass roof is crucial for preserving its integrity and prolonging its lifespan.

Here are some key steps to include in your regular maintenance routine:

Cleaning the Roof: Ensuring a Pristine Surface

Keeping your RV’s fiberglass roof clean is a crucial aspect of its maintenance.

Regular cleaning not only enhances the appearance of your RV but also helps in preserving the roof’s integrity.

Here’s a step-by-step guide to effectively clean your RV’s fiberglass roof:

Step 1: Gather the Necessary Supplies

Before starting the cleaning process, gather all the supplies you’ll need.

This ensures you have everything within reach and avoids interruptions during the cleaning process.

Here are the essential items you’ll need:

  • Mild, non-abrasive cleaner: Look for a cleaner specifically designed for RV roofs. Harsh chemicals or abrasive cleaners can damage the fiberglass surface.
  • Soft bristle brush: Opt for a brush with soft bristles to prevent scratching or damaging the roof.
  • Bucket of water: Fill a bucket with clean water to use for rinsing the roof.
  • Hose or pressure washer: A hose with a sprayer attachment or a pressure washer can be helpful for rinsing off the cleaner and removing dirt.
  • Safety equipment: Consider wearing gloves and safety goggles to protect your hands and eyes during the cleaning process.

Step 2: Rinse the Roof

Start by rinsing the roof with water to remove loose dirt, debris, and any loose particles.

Use a hose or pressure washer to spray water evenly across the roof’s surface.

This initial rinse helps to loosen the dirt and prepares the roof for the cleaning solution.

Step 3: Apply the Cleaner

Dilute the mild, non-abrasive cleaner according to the manufacturer’s instructions.

Pour the solution into a spray bottle for easy application.

Begin by spraying the cleaner onto a small section of the roof, starting from the top and working your way down.

Make sure to cover the entire roof surface evenly.

Step 4: Gently Scrub the Surface

Using a soft bristle brush, gently scrub the roof’s surface in a circular motion.

This helps to remove stubborn dirt, stains, and grime.

Focus on areas that are particularly dirty or have visible stains.

Be cautious not to apply excessive pressure or scrub too aggressively, as this may damage the fiberglass.

Step 5: Rinse Thoroughly

After scrubbing the roof, thoroughly rinse off the cleaning solution and dirt.

Start from the top and work your way down, ensuring all traces of the cleaner are removed.

Use a hose or pressure washer on a gentle setting to avoid causing any damage to the roof.

Make sure to rinse the brush as well to remove any residual cleaner.

Step 6: Allow the Roof to Dry

Once the roof is thoroughly rinsed, allow it to air dry completely.

Avoid exposing the wet roof to direct sunlight, as this can lead to water spots.

Give it sufficient time to dry naturally before proceeding with any further maintenance or inspections.

Step 7: Optional Waxing

For added protection and to enhance the shine of your RV’s fiberglass roof, consider applying a wax coating.

Choose a high-quality RV roof wax and follow the manufacturer’s instructions for application.

Waxing can provide additional UV protection and help repel dirt and grime, making future cleanings easier.

By following these step-by-step instructions, you can effectively clean your RV’s fiberglass roof and maintain its pristine condition.

Regular cleaning not only keeps your roof looking great but also prevents the buildup of dirt and debris that can lead to long-term damage.

Remember to prioritize safety while cleaning, and always follow the manufacturer’s guidelines for any cleaning products you use.

Now that you have a sparkling clean roof, let’s move on to the crucial task of inspecting the roof for any signs of damage or wear.

Inspecting for Damage: Ensuring the Structural Integrity of Your RV Fiberglass Roof

Inspecting your RV’s fiberglass roof regularly is a crucial step in maintaining its integrity and identifying any potential issues before they escalate into major problems.

By performing thorough inspections, you can catch signs of damage, water intrusion, or wear and tear early on, allowing you to address them promptly and avoid costly repairs.

In this section, we will delve deeper into the process of inspecting your RV’s fiberglass roof and highlight key areas to pay attention to.

Frequency of Inspections

It is recommended to inspect your RV’s fiberglass roof at least twice a year, ideally before and after the peak camping season.

Additionally, if your RV has been exposed to severe weather conditions, such as heavy rainstorms or hail, it is wise to conduct an extra inspection to ensure no damage has occurred.

By adhering to a regular inspection schedule, you can stay on top of your roof’s condition and prevent any potential issues from escalating.

Tools and Equipment Needed

To conduct a thorough inspection, you’ll need a few essential tools and equipment.

These include:

  1. Safety Gear: Before you begin, prioritize your safety by wearing appropriate gear, such as slip-resistant shoes, gloves, and eye protection.
  2. Ladder or Step Platform: To access the roof safely, utilize a sturdy and stable ladder or a step platform specifically designed for RV use. Ensure that the ladder or platform is in good condition and securely placed on a level surface.
  3. Flashlight: A good-quality flashlight will help you illuminate hard-to-see areas and identify potential issues even in low-light conditions.
  4. Magnifying Glass: A magnifying glass can be handy for examining small cracks or detailed areas more closely.

Step-by-Step Inspection Process

Follow these steps to conduct a comprehensive inspection of your RV’s fiberglass roof:

  1. Clean the Roof: Before beginning the inspection, ensure that the roof is clean and free of dirt, debris, and loose particles. This will allow for a more accurate assessment of the roof’s condition.
  2. Visual Examination: Start by visually examining the entire surface of the roof, paying close attention to the following areas:
    • Seams and Joints: Inspect the seams and joints for any signs of separation, cracks, or gaps. These areas are prone to water intrusion and may require additional attention.
    • Vents and Skylights: Check the condition of all vents, skylights, and other roof protrusions. Look for cracks, gaps, or damaged seals that could lead to leaks.
    • AC Units: Examine the AC units and ensure that they are properly sealed and securely mounted. Check for any signs of water stains or damage around the units.
    • Antennas and Satellite Dishes: Inspect antennas and satellite dishes for secure mounting and any signs of damage or wear.
    • Edges and Trim: Pay close attention to the edges and trim of the roof. Look for any lifting or damage that may compromise the integrity of the roof’s seal.
    • Delamination: Check for any signs of delamination, which may appear as bubbles, wrinkles, or separation in the fiberglass layers. Delamination can weaken the roof and lead to further damage if not addressed promptly.
    • Cracks and Punctures: Carefully inspect the entire roof surface for any visible cracks, punctures, or holes. Even small cracks can indicate underlying damage or potential leaks.
  3. Water Intrusion Testing: In addition to the visual inspection, it is beneficial to perform a water intrusion test to ensure the roof’s waterproofing is intact. With the help of a second person, use a hose to spray water on different sections of the roof while the other person checks for any signs of leaks inside the RV. Pay close attention to areas that showed signs of concern during the visual examination.
  4. Document and Address Issues: As you conduct the inspection, document any issues or areas of concern. Take clear photos and notes to refer back to when addressing the identified problems. If you notice any significant damage, it is advisable to consult a professional RV technician to assess the situation and provide appropriate repairs.

Importance of Prompt Action

During the inspection, if you discover any signs of damage, it is crucial to address them promptly.

Delaying repairs can lead to further deterioration and potential water damage inside your RV.

By promptly attending to issues, you can mitigate the risk of expensive repairs down the line and ensure the longevity of your RV’s fiberglass roof.

Sealing and Resealing: Protecting Your RV’s Fiberglass Roof

Sealing and resealing your RV’s fiberglass roof is a crucial step in its maintenance routine.

A well-sealed roof acts as a barrier against water intrusion, preventing leaks and potential water damage.

Additionally, a proper sealant helps protect the fiberglass surface from harmful UV rays, which can cause deterioration over time.

Let’s delve into the process of sealing and resealing your RV’s fiberglass roof in more detail.

Choosing the Right Sealant

Before diving into the sealing process, it’s essential to select the right sealant for your RV’s fiberglass roof.

Not all sealants are created equal, and using the wrong one can lead to subpar results.

Refer to your RV manufacturer’s guidelines or consult an RV professional to determine the recommended sealant for your specific roof material.

They will be able to recommend a sealant that is compatible with your roof and provides the best protection.

Cleaning the Roof Surface

A clean roof surface is a prerequisite for an effective seal. Start by removing any loose dirt, debris, or leaves from the roof.

It’s crucial to use a gentle approach to avoid damaging the fiberglass surface.

A soft bristle brush or a leaf blower can be helpful in this process.

Once the loose debris is cleared, proceed to wash the roof with a mild, non-abrasive cleaner specifically designed for RV roofs.

Avoid using harsh chemicals or abrasive cleaners as they can damage the fiberglass.

Rinse the roof thoroughly with water to ensure all cleaning residues are removed.

Preparing the Sealant

Next, prepare the sealant according to the manufacturer’s instructions.

This typically involves mixing or shaking the sealant to ensure it is well blended.

Some sealants may require additional preparation steps, such as priming or activating agents.

Take the time to read and follow the instructions carefully to achieve the best results.

Applying the Sealant

When applying the sealant, start with the seams and edges of the roof, as these areas are more susceptible to leaks.

Use a brush or an applicator recommended by the sealant manufacturer to ensure even distribution.

Apply the sealant in a smooth and consistent manner, working from one end of the roof to the other.

Pay extra attention to any vents, AC units, or other protrusions on the roof, as these areas often require additional sealing.

Checking for Proper Coverage

After applying the sealant, visually inspect the roof to ensure that the entire surface is adequately covered.

Look for any missed spots or thin areas and apply additional sealant as needed.

Proper coverage is essential to create a reliable barrier against water intrusion.

Take your time during this step to ensure a thorough and complete seal.

Curing and Drying

Once the sealant is applied, allow it sufficient time to cure and dry.

The curing time can vary depending on the specific sealant used, so refer to the manufacturer’s instructions for guidance.

During the curing process, it’s crucial to keep the roof protected from rain or other sources of moisture.

Consider the weather forecast and plan the sealing process accordingly.

Regular Resealing

Resealing your RV’s fiberglass roof is not a one-time task.

Over time, the sealant may deteriorate due to exposure to UV rays, extreme temperatures, and general wear and tear.

It is advisable to inspect and reseal your RV roof regularly, typically every 1-2 years or as recommended by the sealant manufacturer.

By staying proactive with resealing, you can maintain the integrity of your roof and prevent potential leaks or damages.

Remember, proper sealing and resealing of your RV’s fiberglass roof play a vital role in its overall maintenance.

It is a task that requires attention to detail and adherence to manufacturer’s guidelines.

If you are unsure or uncomfortable performing the sealing process yourself, consider consulting a professional RV technician who can assist you in ensuring a proper and effective seal.

Sealing and resealing your RV’s fiberglass roof is an investment in its long-term protection.

By taking the time and effort to maintain a strong and reliable seal, you can enjoy worry-free travels and extend the lifespan of your beloved RV.

Repairing Damage: Restoring Your RV’s Fiberglass Roof

Repairing damage to your RV’s fiberglass roof is a crucial step in maintaining its structural integrity and preventing further issues.

Whether you’re dealing with minor cracks or more significant damage, it’s essential to address the problem promptly.

Here’s a detailed look at the process of repairing damage to your RV’s fiberglass roof:

Assessing the Damage

The first step in repairing damage is to assess the extent of the problem.

Inspect the damaged area carefully, looking for cracks, punctures, or signs of delamination.

Determine if the damage is limited to the surface or if it extends deeper into the fiberglass layers.

Understanding the severity of the damage will help you decide on the appropriate repair method.

Gathering the Necessary Tools and Materials

Before you begin the repair process, gather all the tools and materials you’ll need.

This includes:

  • Fiberglass repair kit: Purchase a high-quality fiberglass repair kit that includes resin, hardener, fiberglass cloth, mixing containers, and application tools.
  • Safety equipment: Wear protective gloves, goggles, and a mask to safeguard yourself during the repair process.
  • Sandpaper: Use sandpaper with various grits to prepare the damaged area for repair.
  • Clean cloth or sponge: Keep a clean cloth or sponge nearby for wiping away excess resin and cleaning the surface.
  • Disposable brushes or rollers: These will be used to apply the resin and hardener.
  • Masking tape: Use masking tape to create boundaries around the damaged area to prevent resin from spreading where it’s not needed.
  • Plastic sheeting: Lay plastic sheeting on the ground to catch any resin drips or spills.

Preparing the Surface

To ensure a successful repair, prepare the damaged surface properly:

  1. Clean the damaged area: Thoroughly clean the damaged area using a mild detergent and water. Remove any dirt, grime, or debris that could interfere with the repair process. Allow the surface to dry completely before moving on to the next step.
  2. Sand the damaged area: Use sandpaper to gently sand the damaged area. This step helps create a rough surface for the resin to adhere to. Start with a coarse grit sandpaper and gradually move to a finer grit for a smooth finish. Wipe away any sanding residue with a clean cloth or sponge.
  3. Mask off the repair area: Use masking tape to create boundaries around the damaged area. This will prevent the resin from spreading beyond the intended repair area.

Applying the Repair

Now it’s time to apply the fiberglass repair materials:

  1. Mix the resin and hardener: Follow the instructions provided with your fiberglass repair kit to mix the resin and hardener in the specified proportions. Thoroughly mix the two components together until they form a uniform consistency.
  2. Apply the resin: Using a disposable brush or roller, apply a layer of resin to the damaged area. Make sure to saturate the fiberglass cloth included in the repair kit with resin before applying it to the damaged surface. Apply additional layers of resin and fiberglass cloth as needed, ensuring each layer is completely saturated with resin.
  3. Smooth out the repair: After applying the necessary layers of resin and fiberglass cloth, use a brush or roller to smooth out the repair and remove any air bubbles or excess resin. Smooth the edges of the repair to blend it seamlessly with the surrounding surface.
  4. Allow the repair to cure: Follow the manufacturer’s instructions regarding the curing time for the resin. It typically takes several hours or even overnight for the repair to fully cure. During this time, make sure the repair area is protected from dust, debris, and moisture.
  5. Finishing touches: Once the repair has cured, you can sand the surface lightly to ensure a smooth finish. Use progressively finer grit sandpaper to achieve the desired level of smoothness. Wipe away any sanding residue and clean the area thoroughly.

Seeking Professional Assistance

If you are dealing with extensive or complex damage to your RV’s fiberglass roof, or if you are unsure about the repair process, it is advisable to seek professional assistance.

RV service centers or technicians experienced in fiberglass repairs can provide expert guidance and ensure that the repair is done correctly.

Remember, addressing any damage promptly is crucial to prevent further issues and maintain the integrity of your RV’s fiberglass roof.

By following the proper repair procedures and seeking professional help when needed, you can restore your RV’s roof and enjoy worry-free adventures on the road.


How often should I clean my RV’s fiberglass roof?

It is recommended to clean your RV’s fiberglass roof at least twice a year or more frequently if you frequently travel in dusty or dirty environments.

Can I use any cleaner to clean my RV’s fiberglass roof?

No, it is essential to use a mild, non-abrasive cleaner specifically designed for RV roofs. Avoid harsh chemicals or abrasive cleaners as they can damage the fiberglass surface.

Can I walk on my RV’s fiberglass roof during inspections or maintenance?

While fiberglass roofs are generally sturdy, it is best to avoid walking on them whenever possible. If you need to access the roof, use a stable and secure ladder or step platform to distribute your weight evenly.

How do I know if my RV’s fiberglass roof needs resealing?

Check the condition of the existing sealant. If you notice cracks, peeling, or signs of deterioration, it is time to reseal your RV’s fiberglass roof.

Can I repair minor cracks in my RV’s fiberglass roof myself?

Yes, minor cracks can often be repaired using a fiberglass repair kit available at most RV supply stores. Follow the instructions carefully to ensure proper repair.

Is it necessary to consult a professional for all RV roof repairs?

While minor repairs can be done by RV owners, it is advisable to consult a professional technician for significant damages or if you are unsure about the repair process.


Maintaining your RV’s fiberglass roof is an integral part of ensuring the longevity and performance of your vehicle.

Regular cleaning, inspections, sealing, and timely repairs are essential for keeping your RV roof in top shape.

By following the steps outlined in this guide and addressing any issues promptly, you can enjoy worry-free travels and protect your investment for years to come.

Remember, taking care of your RV’s fiberglass roof is just one aspect of overall RV maintenance.

Regularly check other components, such as the engine, tires, and interior, to ensure your RV remains in excellent condition for all your adventures on the road.