What percentage deviation from the construction drawing is allowed?

Well, let's say you can stub your little toe. I would also find it annoying, but I think a reinstallation would be disproportionate. Ask for compensation due to a cosmetic defect, 200 EUR refund or something.

Before that, he breaks his nose!! It is a cosmetic defect, nothing more. Replacement would be disproportionate.

Are you a troll or something?

Hmm, I think I measured too little here? Whether the shower is 90 or 87 wide, as long as I can use it without restrictions.
My site manager would have thought I was crazy for something like this and asked if I had no other worries, and then we would have gone for a beer together.
Well, the edge on the floor doesn’t look nice, especially when water runs over it, it can’t flow back.

What I find frustrating is that you need a change order for something like this; we immediately said we wanted it that way and then it was done like that.
Unfortunately, the screed layer didn’t listen, so our tiler chipped out too much screed again, there was no discussion about that.
And the plumber came and had to lower the drain because of the 3% slope.

Luckily, I had photos of the underfloor heating pipes.

The shower is totally porno! cool.

That can be done more nicely; if it bothers you, then have it changed before you are annoyed forever. We had two glass showers installed by the glazier and the panes sit exactly on the edge.