Asked on Dec 18, 2018

How do I seal a basement floor?

Evelyn ClairmontLifestyles HomesBijous


It leaked and turned flooring grey which is mold so I removed most of it, still have places where it was glued heavy. What steps do i take now to seal it. My walls are also concrete block which are painted.

4 answers
  • Judy
    on Dec 18, 2018

    Carol this what we have done to repair our leaky floor.

    Hydraulic cement is the answer. Enjoy your dry floor.

  • Bijous
    on Dec 18, 2018

    Hi Carol. Remove it all. If you can't, hire out. You must get up all the flooring as moisture and mold may be lurking underneath. If the leaked hasn't been addressed, do that too. Only then consider re-sealing the floor. I suggest using an epoxy paint.

    • Blaire Simpson Oslander
      on Dec 18, 2018

      I agree, first you have to figure out where the moisture is coming from. Solve the cause before you treat the symptoms. If it's coming in from outside, you may need a french drain or other ways to divert the water. If it's ground water, maybe a sump pump. Good luck. I sympathize, have been there.

  • Lifestyles Homes
    on Dec 19, 2018

    Mold is already there, you wrote. Get the water draining away from the house first. French drains, downspout extensions, 4% slope away from the house.

    Mold is getting into your entire home via the HVAC system.

  • Evelyn Clairmont
    on Dec 22, 2018

    What about "Flex Seal"?

    Painting it on the floors and walls AFTER you take care of the water issue?

    Get professional strength bleach at Home Depot or Lowes, mix with water as directed on bottle and wear rubber gloves to wash moldy areas first. Use fan for air circulation and if possible open windows to vent bleach fumes. Let dry completely.

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