Sanitary facilities and noise

Hello,

this is what our floor plans look like with the bathrooms in detailed planning:


Now I have the following question: I am concerned that the use of the toilets might cause sound transmission and disturbance in the rooms Child3 on the upper floor and Office on the ground floor (which might later be converted into a bedroom). Is the front-wall installation sufficient to minimize this disturbance? Who has experience with such noises? Or would you put the toilets on another wall?

We also discussed this because, for example, we had a bad experience with it in a family home. The architect says that nowadays it can be better insulated than before. But: it cannot be switched off. Therefore, in the upper floor, where the main bathroom borders a child's room, we only installed the bathtub. It is not used very often, especially not in the morning, and when it is, it runs for a few minutes and that's it. Better than a toilet with flushing. But especially as a child, you get used to everything. Relatives are also currently building (much more carelessly regarding floor plan design) and have the main bathroom exactly between the two children's rooms. "You get used to it." Well then.

What kind of masonry do you have?...an 11.5 limestone sandbrick insulates sound better than 11.5 aerated concrete.

We have an 11.5 cm wall made of limestone sandbrick, the toilet borders the bedroom... you can hardly hear anything, at least it hasn't woken me up yet.

There is drywall around the pre-wall element... in our case also insulated and double boarded...

Toilets also make different sound levels... for example, we have a rimless toilet, which is significantly louder than my brother's non-rimless one... we could still improve here.

And a tip: Install proper doors, at least with a hollow core panel, maybe even solid core. That helps too...

Flow noises can be clearly heard depending on the installation and arrangement. I would try, with reasonable additional effort (right stone, alerting the plumber, noise-insulating drainage pipes, etc.), to eliminate such potential noises as much as possible. Just because the office "might" become a bedroom someday, I would not completely redesign here. And as already mentioned: children hardly mind it, and for adults it depends on sleep anyway. I wake up upstairs if a fly is flying downstairs...

It is important that the water pipes are decoupled from the wall. My experience is that the toilet flush in our new building is pretty much the quietest. The manufacturers already do a lot for soundproofing. However, our shower is really loud, which comes from the pattering of the rain shower on the steel tray. I am therefore glad that our shower more or less stands freely in the room.

It is important that the water pipes are decoupled from the wall.

Exactly. and that's where the sanitary solder comes into play. There are really a lot of great things from manufacturers.

But some of them still pipe like 50 years ago.