There is a row of tiles (1 tile high) behind my kitchen sink. Recently I noticed one or two of them were separating from the wall slightly. This continued to happen over the next few days until about 5 of them literally fell off. I checked behind the missing tiles and the wall appears fine - no moisture or mould, just bare bricks.
I've only owned the place for about a year, but judging from the design of the kitchen the tiles are probably 20+ years old.
Would anyone know what could have caused this?