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  1. #1
    Thailand Expat
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    Waterproofing cement walls below grade

    One room in my house has two sides that are approximately 18 inches below grade. How would you waterproof the portion of cement block walls that are below grade in Thailand?

  2. #2
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    what does "below grade" mean?

  3. #3
    Newbie madcow's Avatar
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    You can get a product called Bondcrete , usually any where that sells paint or hardware has it , it can be diluted with water and either sprayed or brushed .

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  5. #5
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    'Weatherkote' made by Shell is good stuff. Had a couple of houses were rainwater was coming into the kitchen from the outside wall. A couple of coatings did the trick in both cases. Only problem is that it's brown in colour.
    Can buy it from Home Works or Home Depot etc.

  6. #6
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    Quote Originally Posted by DrAndy View Post
    what does "below grade" mean?
    and...?

    the subsequent two answers seem to suggest using products that waterproof the walls above ground, to stop rain penetrating

    they would not work below ground

  7. #7
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    ^Weathercote does.

  8. #8
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    it is called weathercoat as it stops the weather; it is not made for damp-proofing below ground, although it may work for a while

  9. #9
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    weathercote reckons it can be used to repair cracks on water tanks aswell, never tried that though.

  10. #10
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    Waterproofing cement walls below grade

    Quote Originally Posted by DrAndy View Post
    what does "below grade" mean?

    Means below ground level.

  11. #11
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    Back in Missouri and Florida, the two states where I had some building experience years ago we used a black tar like stuff and painted it below grade with a brush. However, here in Thailand I don't know what to use and I think with the heavy rain storms we get I might get damp walls if I don't do something.

    I do, as I think most of us do, explained to my wife what I want and why, etc. When she asked so far about the material all she gets is dumb looks.

    It sure would be nice to be able to read all of the information and instructions on building materials here..but...dah....

  12. #12
    I am in Jail
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    Quote Originally Posted by ceburat
    a black tar like stuff
    "Flintcoat", they use it for roofing, pretty crap for that, gets too hot here.

  13. #13
    Member The_Dude's Avatar
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    Hot tar coat with tar fiber material layed over it. If youcan find it.

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