2 walls are plastered, the third I have just tiled over existing tiles, which are stuck to a plasterboard wall.
Tiles have cracked on all 3 walls - no pics, sorry.
Walls which weren't already tiled were in reasonable condition, although tiled previously - they are plastered, I just stripped the old tiles off as best I could and tiled over.
No prep, other than strip old tiles/adhesive etc, making as smooth as possible.
Ceramic tiles
.
Adhesive called Palace Aqua tile, waterproof for bath/kitchen. Rather alarmingly, after replacing a couple of cracked tiles, I've just noticed that the adhesive isn't really holding - it's still quite soft and mushy. The tiles aren't falling off or anything, but I thought it'd at least be rock hard.
House 20 years old.
What should I do - pull them all off and start again, or hope no more crack and they don't start falling off?