You have a point but what are the chances of those tiles being laid in a vertical line when the tiler, I don't know this but will probably work in horizontal courses
COuld it be the valve , they are a pain in the arse to fit (going off a few jobs where a plumber has fit them) plumbe always moans that they won’t come out far enough when boarded, and when we tile them , the board bent around it, if you know what I mean, could it be a stress crack , pipes and valve tiling against the week, moved a bit with heat and cracked.
Does not help with being small soft ceramics as well ?
Thanks Paul
Strikes me it HAS to be a heat issue that the 6mm Wedi can’t cope with causing the movement/cracks.
But it’s interesting... I’ve never checked (not that you can easily) to see how close a hot water feed pipe to a shower is to the plasterboard.
Will look out to see what closure there is on this.
Thanks again