I'm so glad I asked for the expert's opinion - I was starting to think it was just me being too much of a perfectionist! I'll get him back after the holiday and ask him what he plans to do to fix it. That'll ruin his holiday spirit! I just wish he hadn't been paid (or at least not in cash!), then he might be more keen to sort it out. I can understand why people don't complain and just pay someone else though, half of me thinks if he couldn't do it properly the first time I shouldn't bother wasting time with him again. But unfortunately every last penny of the bathroom budget has gone (and then some!) so that's not an option. Neither is retiling, as it would mean getting all the bathroom fixings taken out. Plus despite all the tiling problems the room does look great (especially considering what we used to have!) so I'd be gutted if I had to watch it all get ripped out again.
With regards to the floor, the ply definitely wasn't 18mm, I know that much. The builders just sheeted over the floorboards when they did the plasterboard and electrics etc to tidy the room up, and the tiler didn't change it. I've just checked and there are already hairline cracks in some of the grout lines. They're barely noticeable because it's sanded grout, but I'll keep an eye on them to see what happens between now and his return. The house is full of cracks anyway, there has been a a lot of movement in the houses in this area lately, so I didn't expect it to stay crack-free forever. But he only finished a few days ago!
The other thing is, reading around the forum, it seems the shower walls should have been tanked? Unfortunately he didn't mention this and I didn't know about it - he's just tiled straight onto the plasterboard that the builders used (normal, bog-
standard 9mm plasterboard, not waterproof stuff or tile backer). I don't think he's used any kind of waterproof grout as it darkens when it gets wet - does this mean I'll need to use some kind of sealer to waterproof the joints? Can this even be done now? I have to say, this is turning into a bit of a nightmare! I can understand if I'd paid someone from the pub £100, but I didn't expect this from a "professional". Moral of the story: never trust a man just because of his pretty van :lol: