Recently tore down tiles in the kitchen, and they put up a fight, didn't want to come off. Therefore, there are now holes and gaps in the aerated concrete that need to be repaired, the deepest about 1.5 cm, quite large in diameter. The question is how? Is it enough to apply filler and then put adhesive directly on? Called the store where the new tiles will be bought (intending to put up crystal mosaic) and they claimed: first primer, then filler, then adhesive, then mosaic, but it sounds a bit backward. Is primer needed and what does it do?
Also, there is a wall of regular concrete where it will be put up but it is not particularly damaged, so hopefully, filler is enough there?
So the question is, how is it best to prepare primarily the aerated concrete so that the mosaic adheres well?
Very grateful for an answer!
Stina
Also, there is a wall of regular concrete where it will be put up but it is not particularly damaged, so hopefully, filler is enough there?
So the question is, how is it best to prepare primarily the aerated concrete so that the mosaic adheres well?
Very grateful for an answer!
Stina
A primer ensures that the filler adheres well. AND note that you should not use regular wall filler, but some form of concrete filler. There are gypsum mortar and "gypsum filler" that are actually used to fill large cavities in gypsum boards, which I believe also work. But in other words, no regular wall filler or similar.
In principle, you can also use fix as filler (I believe this applies to all brands of fix).
Often, you don't need to fill holes before tiling, as long as the holes aren't so large that the tiles end up at different heights in the hole. The hole itself will be filled with fix anyway. But since it's a mosaic, holes about 1.5 cm seem too large.
One of the functions of a primer is that it somewhat seals the surface so that it doesn't absorb water. Since the filler (of the right type) needs its water to "cure," it's important that the water isn't absorbed into the surface, as this can create a microscopically thin layer of filler that never hardens right at the transition to concrete/lightweight concrete, causing the filler to easily come off.
In principle, you can also use fix as filler (I believe this applies to all brands of fix).
Often, you don't need to fill holes before tiling, as long as the holes aren't so large that the tiles end up at different heights in the hole. The hole itself will be filled with fix anyway. But since it's a mosaic, holes about 1.5 cm seem too large.
One of the functions of a primer is that it somewhat seals the surface so that it doesn't absorb water. Since the filler (of the right type) needs its water to "cure," it's important that the water isn't absorbed into the surface, as this can create a microscopically thin layer of filler that never hardens right at the transition to concrete/lightweight concrete, causing the filler to easily come off.
If there are minor irregularities, you handle it with the fix; if there are enormous irregularities, it's probably best to plaster the entire wall with mortar/plaster that is available in pre-mixed bags.
So no matter what you do, it's just a matter of bringing out the stålskånskan
So no matter what you do, it's just a matter of bringing out the stålskånskan