Hello! I've searched on the forum and there are many threads about this, and here comes another one. :-)

Recently bought a small single-story terrace house from -59 and the garage, which is made of lightweight concrete, has many quite deep cracks and quite a few screw holes. How do you fill the cracks deeply? Is there some sort of syringe? I found three different bags in the garage and maybe I can use one of them. Repair mortar, DIY concrete, and masonry/plaster mortar.

Cracked light green concrete wall with several deep, jagged cracks and small screw holes, possibly in a 1959 single-story chain house garage.
 
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raspen86
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BirgitS
Have you not considered finding out the cause of the damage, for example, settlements that need to be addressed so that the damage does not recur and get worse?
 
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Trrttsch
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BirgitS BirgitS said:
Haven't you considered finding out the cause of the damage, for example, settlement that needs to be addressed so that the damage doesn't recur and get worse?
I suspect it is because the area was previously poorly drained, but now there are ditches and wells that have been there for many years. It is slab-on-grade, so there isn't much I can do about it? And since it is a terraced house, the wall faces the neighbor's bedroom.

I have at least googled a bit and found that repair mortar, unlike DIY concrete, contains adhesion agents to stick better to the substrate. I need to have it ready before the weekend, so I will probably take a chance on it if no one warns me in time. :-)
 
BirgitS
Okay, I can't answer if it's the right product but have you talked to your neighbors about what they have used since it should be a common problem?
 
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Trrttsch
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Haven't had the chance to talk to the neighbors yet, but I tried the repair mortar today before work and it seemed to go fine. It’s supposed to cure for three days, but I still felt a little on it this evening, and if I brush it lightly with my hand, it comes off like sand. Maybe the mortar is too old? As I mentioned, I found it in a cabinet in the house I bought.
 
I answer myself for the best answers :-) Google says that the mortar I used is too old, so the binder no longer works. Just brush it down and start over. It will be a trip to the hardware store this afternoon.

Case closed.
 
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Wasim mia and 1 other
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Finja Lagavägg is absolutely phenomenal for this. Highly recommend
 
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Trrttsch
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Thanks for the tip. I'll tackle the next wall shortly.
 
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