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How to Remove and Replace Rotten Particle Board SubflooringBy: Danny Lipford
When replacing the flooring in our house, we found rotten spots and bubbles in the particle board subfloor. How do we repair the damage before the new flooring goes down? -Lisa
Particle board is easily damaged by moisture and water, making it a poor choice for subflooring. Unfortunately, that hasn’t stopped it from being used. The only way to repair deteriorated or rotten particle board subflooring is to remove the damaged areas. Here’s how to go about it.
To remove damaged sections of particle board subflooring:
- Attach New Subfloor: Attach the new plywood subflooring to the floor joists with construction adhesive and screws.
If your time and budget allow, I would remove all the particle board subflooring and replace it with plywood. But if you feel the undamaged particle board will remain in good condition, you would only have to tear out the areas that need replacing.
If you’re installing tile, put a layer of cement backer board on top of the subfloor, or use a waterproof underlayment membrane, so the tile will adhere properly.
Good luck with your project,
- How to Patch a Hole in a Wood Floor from a Furnace Grate (video)
- Installing Tile Over a Wood Subfloor (article)
- How to Level a Subfloor (video)
- Installing Cement Backer Board on a Wood Subfloor Before Tiling (video)
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