The shower drain was installed incorrectly - tolerate it or not?

I am also less bothered by the appearance. I would accept that for a certain amount, but definitely not for 500 euros.

Technically, in my view, it’s botched work; sooner or later, the water will run through the tile joint, as Otus already mentioned. Therefore, get rid of it. I assume there is no underfloor heating anyway, so the screed situation is not so bad. The patched area will be resin-treated and that’s that. For a proper tiler, that’s not an “unacceptable” effort.

Hello, thanks for the hint. Unfortunately, underfloor heating is installed throughout the entire bathroom. So also in the shower...

Do you mean by "...sooner or later, the water will run through the tile joint..." the right joint? The one with the greater distance to the wall? Or that the drain shouldn’t be installed so close to the wall in general? Then the entire installation would be botched from the start and not just the off-center installation itself, right?

... that the drain should generally not be connected so close to the wall? Then the entire installation would be botched from the start and not the off-center installation itself, right?

Correct, but to say more precisely, one would of course need the exact specifications of the drain.

Just checked: The gutter has a wall flange. You just can't see it in the picture - it's behind the white tile. So unfortunately, I won't get away with it ...

Correct, but to say more precisely, you would of course need the exact specification of the drain.

Dear Martin, however, something caught my attention or rather I just measured: The shower is 100 cm wide and the channel is 70 cm. Shouldn't a longer channel be installed given the length? Like an 80 one? Or does it not matter?

The wall upstand must of course be sufficiently wide so that water cannot run past it. For this reason, most channels are also installed with a gap from the wall. Whether this matches the existing slope here cannot be assessed from a distance but could certainly become problematic. Especially on the right side, it looks as if there is only a slight slope. In this case, optimal sealing to the wall tile is extremely important if the upstand does not extend across the entire width.

Presumably, an 80 channel should be installed there, then it would probably be centered as well

Hello, thanks for the hint. Unfortunately, the entire bathroom has underfloor heating installed. So also in the shower...

Most likely, the screed layer above is too thin... I would have that checked. We built with a very reputable company, and they refused to install underfloor heating under the shower because they could not do it according to standards. According to our expert, this was often done in the past, and many of these houses have problems today.

By the way, in our house, the drain is in the wall and not in the floor.