How to Seal a Leaking Cinder Block Basement

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Many homeowners use their basement for storage or finish it to create a liveable space. Neither of these two options is feasible for homeowners with wet basement problems. Fortunately, homeowners who wish to waterproof their cinder block or cement basement can now choose from a variety of brush-on waterproofing products. These products are easy to apply and work well, making it possible for wet basements to be turned into useful space.

Things You'll Need

  • Broom or vacuum cleaner with brush extension
  • Paint rollers and brushes
  • Primer
  • Liquid rubber patch
  • Brush-on waterproofing
  • Finishing top coat
  • Clear away any dust or debris on the cinder blocks with a broom or bristled vacuum cleaner attachment.

  • Apply two coats of waterproofing primer to the basement walls and floor using a roller or paint brush.

  • Patch any cracks or holes in the wall with seam tape or a rubber-based sealer after the primer has dried.

  • Apply two to three coats of brush-on waterproofing with a roller or paintbrush. Note that although two to three coats will work for most water-proofing products, some may require more or less. Always be sure to follow the product directions.

  • If desired, use a roller or brush to apply a finishing top coat to the basement.

Tips & Warnings

  • Some do-it-yourself waterproofing systems include the waterproofing component in the primer or top coat to save steps.
  • When choosing the brush-on water sealing product you wish to use in your basement, remember that different products provide different finished looks.
  • Always be sure to read and follow the safety instructions provided by the waterproofing chemical manufacturer.

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References

  • Photo Credit block wall image by Greg Pickens from Fotolia.com
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