I had some questions about repairs in concrete walls and I'm attaching some pictures for you to see. The small crack is just above a door and the larger one is where two walls meet. I have searched on Google but thought I'd still ask for advice if anyone has done the same repairs with good results.
For the small crack, I might grind it out 5 cm wide and then apply a fiberglass tape before skimming the wall so that it doesn't bulge out. Is this a good idea or should I simply fill the crack with latex sealant instead to avoid it reappearing?
For the larger one, I thought of inserting a backing rod and then filling with gypsum plaster before skimming this wall too. Should I use fiberglass tape here as well or do you think it will hold?
The walls will be painted after skimming, I should add.
Grateful for any advice on the best way to do this.
As mentioned, fill and paint.
If the concrete moves, there is no surface layer in the world that will hold.
Microliten will likely wrinkle all the way then.
I'm also considering what to do with the outer corner at the large gap, do people usually put a corner guard or is it enough to just plaster? I'm mainly thinking about when a part has fallen off, which might make it difficult to get the sharp 90-degree angle again. And if so, is it paper/steel/PVC or what applies?
This is achieved with a straight board that is screwed vertically in the corner. Then you plaster. Corner protection can be used, but it is probably uncommon on concrete (or is it lightweight concrete?).
Works fine with sheeetrock corners if you're not very experienced with spackling. I'm a little skeptical about these plastic corners that you water. I've seen too many constructions where they come loose.
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