Planning to tidy up a bit in the tractor garage with even walls, there are some foundation stones like in the picture that are a bit in the way. Is it possible to chip away a bit of them without them cracking the "wrong" way? Or is it purely random how they might crack? There are a total of 4 stones, for 2 of them it would be enough to remove 5-10cm, the one in the picture about 20cm, then one with 30-40cm...
Have a similar problem in my basement that causes moisture penetration and fungal growth around the stone/rock outcrop.
Considering using expansion mortar but I'm worried about damaging the foundation since it would be desirable to remove the entire stone, including the part the foundation rests on. Otherwise, the moisture will continue to penetrate.
That risk could also exist in TS's case.
If you drill X number of holes that are as deep as the stone protrudes and then use snail dynamite, I THINK the matter is settled.
Depends a bit on how much is left outward....
Does it work to drill with a hammer drill and concrete drill? I don't think I can reach properly with an angle grinder... There's about 30 cm of the stone under the frame, it shouldn't break by accident, right? If you drill a few holes just above the floor into the stone, it shouldn't crack all the way down, should it?
It's perfectly fine to use a sledgehammer and a concrete drill (choose a long one).
Removed about 3 m3 with snigeldynamit this summer where the patio is, drill deep and fairly close together (1-2dm between the holes depending on how hard the stone is), then use the snigeldynamit or wedge and feathers (depending on what you can get easily and affordably)
works perfectly to use a sledgehammer and a concrete drill (choose a long one).
removed about 3 m3 with expanding mortar last summer where the deck is, drill deep and fairly close (1-2dm between the holes depending on how hard the stone is), then use the expanding mortar or splitting wedges (depending on what you can get hold of easily and cost-effectively)
With splitting wedges, you can get unwanted cracks backward, likewise snail dynamite, if it is absolutely sacred that they must not crack backward, the only safe solution besides an angle grinder is then to rent a hand drill and drill a tight seam, then split them with either snail dynamite, darda, or regular dynamite.
I went with 18mm.
If you place the little stone 3 from above and a few from the side and use snigeldynamit, it should work well, but it might still crack a bit wrong if it's difficult.
I take the opportunity to take advantage of all the good advice for removing stone from under the foundation.
Hope there is no risk to the foundation wall when it comes to removing a stone or part of a rock, as large as in the photo?
Sorry for hijacking the thread.
I "blasted" away a large part of a rock knall when we were expanding our cottage, and it went really well. Just be very precise with the mixture, as long as you follow the instructions, it's fine. It seems far too dry, but if you keep mixing and don't add extra water, it turns out great, and the rock cracks where you drilled.
I borrowed a real rock drill with a compressor as there were nearly 300 holes (if that's enough) about 10-20cm apart in X number of rows, with a 30mm drill and varying depths depending on the slope of the rock.
My advice is to drill closely in your cases nearest the foundation and blow the holes out properly to remove dust. With a rock drill, you get this "for free" as it blows out air at the crown during drilling.
Snigeldynamit is incredibly effective but costs a bit. I went through 14 10 kg buckets...
Good luck!
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