29 thoughts on “How to repair this crack in my foundation?”

  1. Surveyor here. 90% of cracks at this level are caused by either a large tree or leaking pipe expanding or contracting the subsoil.

  2. I would seriously consult a pro on this one. At least get some to come by for estimates so you can talk it over with someone who knows what they are talking about.

  3. First check what is causing that crack, if it is something external, like water damage or something internal on the inside

    Then just tuckpointing and painting should fix it

  4. Get_Rich_SloQuick

    Its common on a corner like that, same as u would see small cracks under a window sill. Fill it with poly, dab with sponge to blend, wait 2 weeks then paint

  5. Looks like you have an extension on your gutter. That’s good because that’s we paid $500 for someone to evaluate what we needed due to cracks and had we had extensions on the gutters, we wouldn’t of had settling which caused cracks. So that was fun

  6. No crack on the other side? Can you see the inside? Dig down and see if that is the extent of it. See if the walk is separated on the inside. You need to determine if the crack is structural or cosmetic.

  7. Can’t tell by the second photo whether the other side is cracked. If it is then it’s called a “corner pop” and is not necessarily indicative of foundation problems in itself, especially if this is the only foundation issue you see around the house.

    About corner pops:


    How I fixed my corner pop:


    The fix from the video above left the new concrete a different color (dark grey) than the existing concrete (light grey) on my house, but the materials were $20 at Home Depot and it looks better to me than missing chunks. It’s pretty much an aesthetic fix.

  8. ididnotdoitever

    Stuff it with hydraulic cement.

    If there’s something obvious causing it, fix that, but if not don’t get too worried about it. All houses settle, and foundation cracks happen when they do. This isn’t a huge one.

    Don’t use regular mortar, as it will flake off later. Hydraulic cement is the proper mud to fix this.

  9. Seeing how close to the corner I wouldn’t be surprised if that is just surface spalling. BUT a professional in-person checkup wouldn’t hurt.

  10. Foundations corners carry more load than the rest of the foundation.

    I very strongly suggest you to call a foundation repair expert. An engineer is going to have to look into this.

  11. I was a home building Superintendent and PM for many years before I got into commercial construction and Structural Engineering. What is being shown here is quite common. And to all the other answers of trees, gutters, or whatever are not the primary cause of this. While they are possible, it has more to do with design.

    Now, when doing the foundation make up after the plumbing rough, post tension cables and or rebar is installed. The thing to realize is there is rebar all over the slab, but it is impossible to put the rebar perfectly in the corner. The rebar runs parallel in both directions to the outside corner. Picture a “L”. These pieces of rebar are placed inside the beam of the house.

    Take a look of this marked up version of a typical slab. What I’ve drawn up is a very large project, the principle is the same.

    This can be corrected with a light weight maximizer product. This can be found at Home Depot or whatever. Look for something above 2000 psi mix.

  12. danielmartin001

    It looks like your foundation is going down in that area. Do you have a basement? Does that crack continue inside? You should look up foundation and basement repair contractors. This looks early, so hopefully not to expensive

  13. Houses often settle over time, causing cracks in walls and slight tilting of doors, and so on. This is nothing to be worried about — usually — as it’s very common as the earth and foundation supports beneath a house settle. There are many buildings that have remained upright and perfectly safe for generations, even centuries, with cracks in their walls. Your home may be one of these.

    On the other hand, a cracking foundation could mean that water has gradually undermined your foundation, the ground has shifted a little, or other foundation supports have eroded. It would be a good idea to call a structural engineer and have him come look at this.

    Funny thing but I just did this for our house which has had some termite damage, so I wanted to know if we had structural issues. They charge nothing to take a look, or at least mine charged nothing. They crawl into the crawl space under your house (if you have one) and check the main supports, the walls and piers and whatever else you have under there. My house checked out just fine. Except for one support wall which has mysterious water-borne “efflorescence” (mineral depostis) on it which appears to be from some kind of excessive water problem like a sprinkler system or leaking pipe — which I’ll have to have looked at more.

    You should do this for your peace of mind. It takes no time at all.

  14. My dude this is a simple corner crack. So many folks don’t know at all what it is and offering bad advice. It’s common with brick veneers for the slab corner to crack or pop. Non-structural, not settlement related. It’s how the veneer interacts with the slab. Simple repair. Ask the pros next time, not a diy sub.

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