How to Use Epoxy to Repair an RV Floor

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Last Updated on April 16, 2025 by Paul Clayton

How to Use Epoxy to Repair an RV Floor

An RV’s floor can succumb to wear and tear over the years, and epoxy is a reliable solution. This guide will walk you through the steps required to apply epoxy, ensuring a durable and lasting repair. It aims to equip you with the knowledge to use epoxy effectively to repair an RV floor.

Key Takeaways:

• • Epoxy is a cost-effective, durable solution for repairing water-damaged or rotting RV floors.

  • Step-by-step prep is essential—from cutting out rot, drying, mold treatment, and sealing with epoxy.

  • DIY epoxy repair can save up to $2,200 compared to professional floor replacements.

  • Use antifreeze or borax to eliminate mold before sealing with epoxy.

  • TotalBoat TableTop Epoxy is a top pick due to its self-leveling, UV resistance, and aesthetic finish.

RV floor repair is not easy work. It requires a lot of effort and the right technique for professional results. People usually repair RV floors when buying used or old RVs with damaged floors.

Or when the floor of their new or new RV gets damaged. Water damage is probably the most common type of RV floor damage.

When people buy used RVs with damaged floors or new RVs, and something damages their floors, they often repair the floors on their own. This is because repairing an RV floor professionally is usually quite expensive. 

I will share a step-by-step guide on repairing a water-damaged or rotted RV floor using epoxy in this article. This guide will reduce your RV floor repair cost by eliminating the need to visit a repair shop.

By the time you are done following the steps, your camper will be fixed, and you will be ready to hit the road for a new adventure.

Without further ado, here is the guide on how to use epoxy to repair an RV floor.

How to Use Epoxy to Repair an RV Floor

1. Investigate The Damage

Investigating the damage will help you to do three things. First, it will help you determine how much work you need. If the damage is limited, you do not need to worry a lot, and the work will not be too much.

However, if the damage is widespread, you must mentally prepare for plenty of work. This will also help you determine what materials and quantities you need.

Lastly, it will help you decide if repairing your damaged floor is the best option. (The alternative to repairing your water-damaged floor is to replace it.

2. Cut Out the Badly Damaged Areas

Once you have investigated and established how much work you need to do / the extent of the damage, you should get the tools to eliminate the damaged areas.

If, for example, your camper’s flooring is made of wood and vinyl, it would be best to remove the cover and cut out the part of the floor that is water-damaged or rotting.

When removing water-damaged areas, thoroughly remove all damaged flooring inside and under your RV.

Make rectangular or square cutouts on the floor, as they will be easier to replace.

3. Let The Wood Frame Dry Out

After removing the badly damaged parts of your RV flooring, you are supposed to let the exposed wood frame of the RV dry out. If you do not do this, the rot could spread in the wood frame and “infect” the new flooring, and you will be forced to repair the new flooring sooner rather than later. 

Five days are enough to dry out your wood framing. 

4. Kill the Mold

Water damage almost always causes mold. So if your RV suffers water damage, the damage and the rotting it will generate will most likely cause mold.

Once you rip out/ remove the damaged areas of your flooring and everything is exposed, you need to kill the mold. Many products can kill mold, such as borax and Antifreeze. The best one is Antifreeze because it is effective and cheaper than Borax. 

The best way to apply it is to use a sprayer. When you get one, spray all the exposed parts of the flooring and the wood frame.

Letting your wood frame and the floor dry out will kill most of the mold; spraying Antifreeze or Borax solution is meant to eliminate lingering mold. 

After applying a good antifreeze product, your RV is supposed to dry out for about five days.

Please note that anti-mold products such as Borax and Antifreeze are poisonous and can cause death if consumed. Therefore, you should exercise maximum caution if you get one.

5. Use Epoxy to Repair Your RV Flooring 

Once everything is dry, you should use epoxy to seal the subfloor wood and make it waterproof. Professionals frequently use epoxy resin combined with a hardener to seal the subfloor surfaces and strengthen the remaining exposed parts of the floor.

You are also supposed to do this. Epoxy makes wooden flooring waterproof and more robust and prevents mold from forming a colony where it is applied.

Professionals also frequently use thinners such as acetone, denatured alcohol, or xylene to thin epoxy resin and spread it over a more extensive area. Please note that epoxy fumes are dangerous.

Therefore, you should consider mixing it with a hardener or a thinner. The best way to avoid the harmful effects of epoxy is to mix it and then apply it in a well-ventilated area while wearing a respirator.

Protecting your hands from their chemicals would be best by wearing disposable gloves. 

There are epoxy products on the market specifically formulated to repair rotting/ water-damaged wood flooring. However, you do not need them to repair your rotting flooring.

Such products are expensive and meant for boats because they are constantly exposed to water.

Nevertheless, if you have money to spare, you should get an epoxy resin product specifically formulated to repair wood flooring. This is because it will be easy to apply.

If you are on a budget, you should get standard epoxy resin, a hardener, and a thinner. Combine the standard epoxy resin with the hardener to mix these three.

Once you have done this, stir the mixture with a thinner such as xylene. The lighter will make your epoxy solution easier to apply with a spray, and it can make a small amount of epoxy resin go a long way. 

Once you have your thinned epoxy plus hardener mixture, spray it on all subfloor wooden surfaces. 

6. Replace the Rotten Wood You Removed

Once you have sprayed epoxy generously on all subfloor wooden surfaces around the damaged areas of the floor you removed, you should replace the damaged parts of the floor.

This step will be easier if you make rectangular or square holes when removing the rotten parts of your floor. 

You need to measure the size of the cutout holes you made and make wood in the same shape. Use notching methods to make sure your new subfloor is supported and stable.

Once you’ve done this, generously spray epoxy on the new wood you just added to seal the holes you cut out. 

When the epoxy cures, you can add insulation to the floor and cover it with a new plywood sheet. You are then supposed to add more epoxy before letting it dry again.

7. Stick Self-Adhesive Vinyl Tiles 

After the epoxy you add to the wood dries, you should use self-adhesive vinyl tiles or pieces to complete the job. 

If you follow the instructions above, you will probably spend less than $300 to repair your rotted, rotting, or water-damaged RV floor. This is not too much, considering replacing an RV floor could cost as much as $2,500. 

It is usually not very easy to tell if the floor of your camper is rotting or water-damaged, if you bought a used camper, or if the water damage happened while you were away.

The easiest way to tell if your RV’s floor is rotting is to step on it. If some parts feel soft or spongy, investigate the subflooring further. A porous floor is the most significant indicator of rot in an RV’s subflooring.

What is the Best Epoxy for RV?

To determine the best epoxy for RV, it becomes essential to consider options that offer durability, UV resistance, and ease of application. One highly recommended option is TotalBoat TableTop Epoxy.

This epoxy resin is renowned for its self-leveling properties that contribute to a smooth and even finish on RV floors.

It provides excellent clarity that enhances the floor’s aesthetic appeal. Moreover, its UV resistance feature is a significant advantage as it effectively prevents yellowing and damage from sunlight, thereby extending the RV floor’s longevity.

Final Thoughts

Learning to use epoxy to repair an RV floor is a detailed and meticulous process requiring careful preparation and execution. The first step involves assessing the damage to understand the extent of the repair work.

Once you have gauged the damage, it is essential to gather all necessary tools and supplies, including epoxy, mixing tools, gloves, and goggles, among others. Proper preparation of the damaged area is crucial; this entails removing debris and sanding down the surface for a smooth finish.

The success of your repair work heavily depends on the correct mixing of epoxy resin and hardener; following the right ratios will ensure proper curing.

Application of the epoxy follows; depending on the area’s size and shape, one can use a brush or roller, spreading the mixture with a putty knife for an even layer. Allow the epoxy to cure as per the manufacturer’s instructions, which usually vary but are crucial for achieving the desired strength and finish.

The final step is sanding and finishing; after complete epoxy curing, smooth the surface using sandpaper for a seamless repair. This process, while time-consuming, guarantees a durable and effective solution to flooring damages in your RV.

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