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Thread: fill holes in foundation

  1. #1
    Join Date
    May 2007
    Rhode Island

    Question fill holes in foundation

    Guys, we had the old oil tank in our basement taken out & according to them the fill pipes must be taken out also. So they took them out & put a tad bit of expanding foam inside. I want to fill them with either concrete or something similar.

    What is the best thing to use & how do I do it? I really don't want to get a 50lb bag of cement to fill 2 small 3" holes.


  2. #2
    Join Date
    Jul 2009
    Amherst, New Hampshire
    I'd use hydraulic cement. It will be waterproof.

    You can get it in small buckets.
    Faith, Hope & Charity

  3. #3
    Join Date
    May 2007
    Thomasville, GA
    We've used concrete patch that comes in 1qt or maybe a 1liter bottle from the borg. It's made for small concrete patches.
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  4. #4
    Join Date
    Oct 2006
    ABQ NM
    The concrete patch stuff from the Borg should work fine, Chuck. Out of curiosity, is there a problem with the expanding foam? I'd think it's as good of or better seal than a concrete patch.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

  5. #5
    Join Date
    Dec 2006
    Floydada, Tx
    hydraulic cement works great for small patches like that.

  6. #6
    Join Date
    Dec 2006
    RETIRED(!) in Austintown, Ohio
    Another vote for the hydraulic cement. Expands a bit as it dries, and makes a waterproof seal that'll last somewhere near forever. Gotta work fairly quickly with it, though - it begins to harden after only a few minutes.
    Jim D.
    Adapt, Improvise, Overcome!

  7. #7
    Join Date
    Aug 2007
    Reno NV
    I used some of that hydraulic cement to patch some cracks in a pre-cast concrete irrigation tank last year. Worked great!

    It comes in little buckets, so no worries about a 50# bag.

    (To be honest, the 'pre-cast irrigation tank' is something that most folks have buried underground and use for fluids other than water. Just another one of the 'creative' solutions the previous owners installed here)
    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash

  8. #8
    Join Date
    May 2007
    Rhode Island
    They only put in about 2" of foam just to keep out small insects & the foundation is about 8" thick.

    Thanks, I'll go get some of the hydraulic cement.

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