ᐅ Bathroom drainage, number of downpipes, prefabricated wall systems, etc.

Hi, I would gladly learn about completed building projects! Could you roughly describe your bathrooms in terms of
- Length and width of the floor area
- Arrangement of bathtub, shower, washbasin, toilet in the room (top left/bottom right ...)
- Number and position of soil stacks, including their layout in the room below
- Ventilation through the roof — boxed-in sections, where and how large
- Use of stud walls.

Background: I am planning my own bathroom and want to understand how washbasin, bathtub, and shower drainage are handled ... routed through the suspended ceiling? Below the ceiling (ceiling of the utility room)? Separately via soil stacks (corners of the utility room)? I am not sure and would like to be better prepared for future discussions and learn about some practical examples.

I have already shared our solution here:
https://www.hausbau-forum.de/threads/Badplanung-3-51m-x-3-51m-ideensuche.11596/page-3#post-79700
There are two soil pipes in the exterior wall with the window: one for the toilet flush with a vent, and another for the bathtub.

Hello

Since the possible solutions vary greatly depending on the building type and floor plan, solutions from other builders will probably not be very helpful for you.

Routing the wastewater pipes through the exterior wall can potentially have a significant impact on the thermal insulation.

Olli

Hello Jochen,

Jochen104 schrieb:

There are two downspouts in the exterior wall

In the exterior wall? And the architect and structural engineer approved it that way?

Regards, Bauexperte

Hello Olli,

wrobel schrieb:

Installing the wastewater pipes inside the exterior wall can potentially have a significant impact on the thermal insulation.

Not only the thermal insulation…..

Regards, Bauexperte

Bauexperte schrieb:
Hello Jochen,


In the building permit / planning permission? And the architect and structural engineer approved it like that?

Regards, Bauexperte

Yes, that was planned that way from the beginning in the detailed design and also discussed with the structural engineer. One downpipe was moved slightly because otherwise a concrete pad would have been in the way.