ᐅ Installation in front of the wall / Pipe routing within the screed

Hello,

we are building a house through a developer.
In the bathroom, we want to install the shower almost flush with the floor (shallow shower tray, recessed in the screed).
The installation of sanitary fixtures and pipes is, according to the developer, to be done using a drywall (stud wall) installation.
A drywall installation behind the washbasin, toilet, bathtub, etc., makes sense to me.
But do all supply pipes really need to be installed in a drywall construction? It should also be possible to lay the pipes in the screed depending on the distance.
I want to avoid having these unsightly baseboards throughout the bathroom.
According to our developer, the pipes cannot be installed in the screed because an underfloor heating system is planned.
However, I have heard from other plumbing companies that, especially due to the installation of underfloor heating, the screed will have a sufficient thickness, so the pipes could be easily laid.
?!?
I assume the underfloor heating does not have to be installed all the way to the edges of the room, right? Are there any specific standards or regulations that must be followed?
The house is still in planning / construction of the shell has not yet started.
Unfortunately, the corresponding plumbing company has not yet been chosen.

Hello,

Gerda schrieb:
In the bathroom, we want the shower installed almost flush with the floor (shallow shower tray, recessed in the screed).

Why not go fully flush—without a shower tray at all?

Gerda schrieb:
The sanitary fixtures and pipes are, according to the builder, supposed to be installed via a wall-hung or pre-wall system.

That is correct.

Gerda schrieb:
I understand using a pre-wall installation behind the sink, the toilet, the bathtub, etc.
But do all supply pipes really need to be routed inside a pre-wall? It should also be possible to lay pipes (depending on the distance) inside the screed. I want to avoid having ugly “baseboards” or trunking throughout the entire bathroom.

I don’t quite understand what you mean?

Gerda schrieb:
According to our builder, pipes cannot be installed in the screed because there is underfloor heating planned.
However, I have heard from other plumbing companies that because of the increased height of the screed due to underfloor heating, pipes could actually be easily installed within it.?!?

How does he plan to achieve the required slope for the shower wastewater drainage?

Gerda schrieb:
I don’t have to extend the underfloor heating all the way to the edge of the room, right? Are there any standards or regulations that must be followed here?

Do you mean underfloor heating beneath all fixtures—including the shower—or how exactly should I understand this question?

Kind regards

Question: In one corner of the room is the shower – a flat shower tray that should be installed flush with the floor level. I need to cover a distance of 2m (6.6 ft) along the wall to the shaft. Is it absolutely necessary to build a stud wall for the pipe installation between the shaft and the shower?
The screed is planned to be about 14cm (5.5 inches) high since underfloor heating will be installed.
Second question: Can a stud wall installation be built only as high as the screed? The pipe cannot be installed higher than the finished screed height because the necessary slope must be maintained.

Hello Gerda,

Gerda schrieb:
Question: In one corner of the room, there is a shower – a flat shower pan that should be installed flush with the floor – then I need to cover a distance of 2m (6.6 ft) along the wall to the shaft. Do I necessarily have to install a wall build-up (stud wall) for the pipework between the shaft and the shower?
The screed is planned to be about 14cm (5.5 inches) thick – as underfloor heating will be installed.
Second question: Can a wall build-up installation only be done as high as the screed? The pipe cannot be installed higher than the finished screed height because I need the proper slope.

Anything I answer now could be wrong – I am not a heating/plumbing specialist and I don’t know the exact floor structure; approximate figures are unfortunately not sufficient. Therefore, I recommend getting a second opinion from a plumbing professional and then discussing this information with your contractor.

Best regards