I've got a limestone patio. The builder apparently didn't support one corner very well and somebody stepped hard on it and a triangle about 1/2 square foot in size broke off. I imagine putting some sort of concrete underneath it but I'm not sure what product to use, or even if this is a good idea or if there's other things I should worry about.

EDIT: Here's a photo: broken patio corner

  • It's not 100% necessary, but would you mind posting photos? Always easier to visualize a solution
    – kavisiegel
    May 20 '13 at 16:42
  • Not sure why I didn't think of that. Added.
    – Grumdrig
    May 22 '13 at 3:56

I am really not sure what your patio looks like. I am going to assume it sits on the ground.

It would be normal for a lot of the erosion of the patio to happen on the corners. You have basically two options...

  1. Compress ground. You need to wet the ground around the area to make sure there are no gaps with weight. The pavers shouldn't be hanging above ground at all. If this is the case then you will have more that breaks. An easy fix would be to get some fast setting quickcrete... Build yourself a box to meet your needs - you will probably need 2 pieces of 2x6. Fill box with the quickcrete and try to push the quickcrete under the adjacent paver piece if there is a gap. Just level it out to fit your needs. Pour slowly so you don't have to cup any out.

  2. Remove the current piece. Keep removing pieces until entire paver lays very flat on the ground with absolutely no gapping. Add more dirt/rock and then compress and reinstall pavers.

  3. Based on picture I would carefully knock off as much of the cement as possible inside the boxed corner - if that makes sense. Really I don't understand the lip. Maybe it looks good but will increase chance of stone cracking. I would then refill with a quick set concrete. It needs to be filled right. You see yours is uneven probably helping the break. I would then put that corner back on... I know you will have a little crack showing but taking a sheet out will be a pain. I would then fill the crack with a knife grade epoxy - should be fine with limestone. Since your color is lighter and very neutral I would not color the epoxy or it might stand out more.

  • Added a photo as I should have from the start. It's all on top of other masonry so this isn't quite applicable to my situation.
    – Grumdrig
    May 22 '13 at 3:58
  • @Grum - see #3. You can skip the epoxy if you get it to sit really flat and you don't notice the crack much. If the crack doesn't line up right I would use something there.
    – DMoore
    May 22 '13 at 20:54
  • By "lip" do you mean the overhang beyond the edge? Or do you mean the way it appears that it would sit on the edge? If the latter, it actually floats above the edges and there's some filler/moulding pieces that broke off too to fill in the gap, cosmetically.
    – Grumdrig
    May 23 '13 at 3:19
  • Lip - I meant both - filler and overhang.
    – DMoore
    May 23 '13 at 3:54

I would use a fiber reinforced concrete to repair the area that has broken away. You could go overboard and use a fiber-reinforced and polymer modified product like this too.

  • Would the broken corner need to be positively attached somehow to the other piece, beyond just floating, sort of, on the concrete?
    – Grumdrig
    May 20 '13 at 2:32

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.