How to Waterproof Bathrooms


There aren't many places in the home that need to be waterproof; however, if any place needs to be, it's the bathroom. Between gallons of water flowing through faucets, water flushing down commodes and steam day after day from the shower, the bathroom is exposed to a lot of water. It is best to waterproof the room to avoid any possible water damage from spills or leaks.

Things You'll Need

  • Silicone caulk
  • Wallpaper or water repellent paint
  • Wonderboard
  • Vinyl or tile flooring
  • Hang wonderboard instead of typical drywall in areas where there will be a lot of moisture like the bathroom. It is waterproof and mold proof.

  • Install a seamless shower system to lower the risk of leaks.

  • Cover walls with wallpaper or a water-resistant paint such as one with a satin or latex finish.

  • Cover floors with tile or linoleum. These are waterproof surfaces that will keep the water on the surface. Some tiles are more water resistant than completely waterproof, unless you apply a sealer to the tile.

  • Apply a silicone caulk over all seams where the flooring meets the wall, cabinets or shower. Apply the caulking along the edges where the cabinets and sink meet the walls. This will keep potential water or steam drips from making their way to subflooring or behind walls.

  • Run caulking around all seams where the bathtub meets the wall and floor. Apply caulking around all bathroom fixtures such as the base of the toilet, sink faucets and shower fixtures.

  • Install a fan to pull moisture out of the air during showers.

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  • Photo Credit bathroom image by Mikhail Olykainen from
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