How can we water proof our basement from the outside.

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We have recently had water seep through the block walls and up the concrete floor which we had put dry loc on years ago

  9 answers
  • Amy Ogden-Paparone Amy Ogden-Paparone on Mar 02, 2018
    Hi April!
    You'll have to walk around your entire home on the outside and check for any cracks in the foundation, no matter how small and patch them with two layers of cement. While you're walking around see if there are areas around where the ground seems to retain water more than others. You could have a drainage problem outside of the home and water is seeping in thru the block wall. If it is a drainage problem even water proofing the outside won't help because water has to have a place to go and it will go where it wants if not directed.

  • Shore grandmom Shore grandmom on Mar 02, 2018
    First, check for standing water after a rainfall. Check your gutters, it's possible that they need to be fixed or replaced. Check your downspouts and make sure they are still connected. Get extensions for the downspouts. If that doesn't help, you can try painting flex seal on your inside or outside walls. We live at the at the beach in NJ and when Sandy hit, there was a businessman that used it to save his store. The surrounding stores were all damaged while his store remained dry.

  • William William on Mar 02, 2018
    Best way is to have a french drain installed around the perimeter of the house. Has to be installed at ground foundation level. Another option is have a french drain installed around the perimeter on the inside. Tendas to be cheaper.

  • Deb K Deb K on Mar 03, 2018
    Grade the ground away from the house build it up at the house if you have to, run downspouts at least 5 feet away from the house.

  • Sharon Sharon on Mar 03, 2018
    I would use a rubber waterproofing like Blue Max, and be sure to move the dirt away from the foundation before applying. You should also check gutters and downspouts are working properly in moving the water away from the house. Sometimes its as simple as adding extensions to the downspouts. https://www.youtube.com/watch?v=6doxs8r2byI
    If you have a bad area, you might also put in a French Drain. https://www.youtube.com/watch?v=676rrMgkF8Q
    be sure to get city to mark utility lines before starting.

  • Tinyshoes Tinyshoes on Mar 03, 2018
    We did the french drain and it works very well! Good luck!

  • Betsy Betsy on Mar 03, 2018
    I have a poured wall, and a crack in it. I had many companies come out to repair it, lots of money, and the only one who did the job was Mr. Sponge! I don't know if they are in your area, but find a company that squirts some sort of foam in the walls. It's not expensive, and you can tell it's working because the foam will come up through the dirt on the outside. It's been about 15 years and no leaks. The only thing that is unnerving is that the stuff that is left on the inside wall is clear and looks like water. When it rains, I run over and touch the wall to make sure it's not water. It never is:) Doesn't take huge equipment or anything and only takes a few minutes. I'm so happy with this product. I hope you can get something like that in your area. Other than that, you can landscape your yard so that the dirt around your house is higher than the rest of the area. Maybe about 6" and then sloping down away from the house. And, add an extension to your downspouts.

  • Agnes Chrzanowska Agnes Chrzanowska on Dec 31, 2020

    pump like sump pump