DIY Tutorials

How to Repair Water Damage on RV Slide Floors

RV Interior
Skill Level

RV water damage is not something you should ignore. A small leak can be a sneaky problem that wreaks havoc on the interior of your RV now and in the future. Find out how to repair water damage on your RV slide floors with this step-by-step guide.

Hammer prying off plywood of RV slide out with water damaged floors
Don’t let water damage go unchecked!

Signs of RV Water Damage

Whether you own your RV or you’re in the market for one, water damage inspection is something you should not skip out on. Here are a few signs of water damage that you should be on the look for:

  • Damp or mildewy smells
  • Soft spots in the roof, in the walls, or along the floors
  • Stains or discoloration
  • Mold
  • Rusty outer screws
  • Cracked caulk

If you’ve spotted any of these in your RV (or an RV you’re considering purchasing), it’s a strong indicator that there is water getting in somewhere.

Where to look for water damage in your RV

If there’s a water leak in the middle of the floor of your RV, you’ll probably notice it. But there are sneaky places that you might not consider regularly inspecting.

Anywhere a roof or wall has been cut for an opening is a potential leaking point. Regularly inspect:

  • RV windows
  • Doors
  • The seals of the RV slide outs
  • Equipment on the roof (A/C, antennas, vents, etc.)
  • The seams of your roof, walls, and ceilings (interior and exterior seals)

The seals of RV slide outs are notorious for leaks. RV slides have seals that can be cracked, often aren’t replaced or maintained regularly, and get dirty. Also, if you make a habit out of parking your rig in a less than level position, your slide seals may not function as intended.

RV Slide Out Floor Water Damage Repair Steps

If you’ve found water damage in your RV, it isn’t a death sentence for your rig. However, it isn’t always a simple fix. Water damage can creep and go unnoticed. When repairing water damage, make sure you strip everything back to find every last inch of water damage to prevent future problems.

Here are step-by-step instructions on how to repair water damage to your slide floors. (Since all slideouts are built differently, the instructions below are for models that have wear bars.)

Before beginning, remove any furniture from the slide out and pull up the flooring (carpet, vinyl, etc.). This process begins on the subfloor.


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