Good morning Jochen104,
I can gladly provide the details of the equipment once we have the offer for it, as we are still waiting for that.
According to the floor plan, the wall with the door is 11cm thick (thin), so that will not work, because the shaft behind the shower contains the entire supply for the house (including heating).
The shower tray is 100x100cm and will be recessed flush with the tiled floor. We were advised against a flush tiled shower in so many places (regarding leaks in the joints), so we decided on this option.
The idea of the pre-wall is a good one, however, we were told that this pre-wall for the toilet must be 130cm high. In the washbasin area, a shallower pre-wall could be chosen. But would this height difference look good?
I will then mention the surcharge here once I have the offer – as well as the photos, in about 6 months.
Best regards
Gatho