In my kitchen, the tiles near the sink started to push out and no longer align. A couple of them have fallen off.
What could cause this to happen?
It only appears to be the tiles where my sink/window is. No other tiles have pushed out.
If I place the tile against where it was meant to be, there is now a gap too, like somehow the wall has expanded.
I have took a picture. As you can see there are now gaps between the tiles and a couple have fallen off.