Is it shoddy workmanship?

[Charlotte Rimmer]

It does look like a damp problem to me. If that wasn't dealt with correctly then the damp behind the tiles will rise. Also normal tiling tanking products won't stop rising damp and can hold the damp in the substrate causing it to fail taking the tiles with it, which is possibly the case here.

Thanks for the input. I do wonder why the tiles we had before on this wall were good for 15 + Years?

If damp is the case, is it still the tilers fault? Or not really?

 

[Old Mod]

It will be difficult to prove an exact cause without removal of the effected area, and even then it can be difficult.
You will certainly have a good chance of determining the cause once tiles are removed.

 

[WetSaw]

Thanks for the input. I do wonder why the tiles we had before on this wall were good for 15 + Years?

If damp is the case, is it still the tilers fault? Or not really?

There was probably no tanking before so the damp had somewhere to go. Of course this is all speculation until you strip off the wall and see what is there.

 

[minimontolit]

Realise an old post but a surveyor would be my port of call.