We have bought an apartment in a concrete lamella building from 1949 with some renovation needs.
We found a crack in the wallpaper. After peeling it off, it turned out to be a crack in the underlying concrete wall. I'm trying to understand what I'm seeing and wondering if it might be due to insufficient reinforcement overlap causing the crack.
When tapping, you notice that a larger area is affected.
The question is how to best solve this? Can it be fixed well with the right filler and then fiberglass reinforcement mesh? What type of filler? Cement-based? Epoxy-based? Other?
