Washbasin: Front wall or installation of connections in the wall

Dear forum members,

for our new build, we are considering whether to install a pre-wall in front of the washbasins or not.

The plumbing company says that both supply and drain pipes can also be installed inside the wall (on the ground floor in a Poroton wall and on the upper floor in a drywall partition). I think it’s good on the ground floor since we don’t have much space anyway in the guest WC; on the upper floor, I’m considering whether

A) you wouldn’t hear the water in the adjacent room through the pipes in the wall if the pipes are not well sound-insulated
b) you don’t need the pre-wall anyway to place things on. Otherwise, you would need either a very wide vanity unit or an additional shelf or mirror cabinet above the sink.

What do you think is better?

Thank you in advance.

From a design perspective:

[*]For smooth walls and installation within the wall: use a slim installation layer (soundproofing) or install in aerated concrete wall / drywall. (also OK)
[*]For desired steps in the wall: use a pre-wall - it does not need to run from wall to wall to look good.
[*]For smooth walls and piping as a design element: lay copper pipes exposed.

I have the same consideration. In the guest bathroom, I will probably omit the pre-wall in the area of the washbasin. However, in the attic, I find this extremely practical.

Have you lost track of your individual topics, or why are you asking about this sub-sub aspect here again separately? Because at: we are already right in the middle of your bathroom.

From a design perspective:

[*]For a smooth wall and installation within the wall: use a slim installation level (soundproofing) or embed in aerated concrete wall/drywall. (also OK) [*]For a desired step in the wall: use a pre-wall - this does not have to go from wall to wall to look good. [*]For a smooth wall and piping as a design element: lay copper pipes exposed.

I guess both will look good. Since I already have a vertical pipe box in the corner of the bathroom where the sink will go, I could incorporate it and extend it as a pre-wall. It certainly also looks good if the sink is directly on the wall. Then you would probably put a lot more on the washbasin. I am still torn back and forth.

I have the same thought. In the guest bathroom, I will probably omit the pre-wall around the sink area. However, in the attic, I find it extremely practical.

Practical yes, but then a lot is left open, which is of course a matter of taste. If you don't have the pre-wall, you could also make a mirror cabinet, but I also never find that so great, as they sometimes protrude quite far, and you constantly have to open the doors to get something out. How deep do you want to make the pre-wall in the attic? I was thinking about 20 cm.