Why are there cracks in the plastered wall inside the house?
After a year of plastering (cement-sand) and puttying (Vetonit LR+), there were barely visible cracks (like cobwebs). After another year, cracks slightly increased in thickness and now visible to the naked eye. I should add that for the last year, the house is already standing with heating.
The cracks are on the plaster, repeating (which is natural) and the putty. The whole kitchen is in these cracks. In the other rooms, everything, thank God, is normal.
I had the idea to expand ALL the cracks with a sharp object, put FUGEN- or UNIFLOT-type filler and put wallpaper on them. But in this case is still not sure that the cracks over time will not increase and do not pass through the repair compound, tearing the wallpaper.
Option two (the most radical) – completely dismantle the plaster and putty and re-do this complex of works. But so far I have no idea how hard and painful it is.
Questions for professionals.
1.Will these cracks still increase over time? Or after three years they can just expand, putty and glue fleece-lined wallpaper?
2. How hard will it be to remove the plaster and putty? I should add that the wall material is Wienerberger blocks.
3. Are there any other solutions for my case?
Answers
The main thing is to understand what is causing the cracks. Problems with the foundation, or something else.
To do this, you need a photo or drawing of the location of cracks on the walls, if they are through, the type of foundation.
I think there is no connection to the foundation – there would be one big crack, not all over the wall.
The whole problem is most likely in the quality of the plaster composition – wrong proportions, exposure, the quality of the plaster.
I would only knock the plaster down if it is "puddling".
If the foundation is okay, you can widen the cracks and putty it up.
The wallpaper will hold up either way. Usually, the old putty is torn off, but you can prime and test glue one small area to see if the old putty holds.
If you need to paint, it's more reliable to put fiberglass fleece on it.
