Wall thickness children’s room / bathroom

Make at least 17.5 cm. Even that I find borderline. We have a 17.5 Poroton wall and you can hear everything in the other room. We are considering whether to put a drywall in front of the children's room walls during the next renovation because it is really very loud. Luckily, the shower is on the bedroom side and you can hear every drop. On the children's room side, we have the sinks and that is okay.

Thickness doesn't help you - even Poroton is a poor material when it comes to sound insulation (as you can see there).

Thickness doesn't help you - even Poroton is a poor stone when it comes to sound insulation (as you can see there).

But this clearly shows the potential builder that massive walls - whether high-perforated bricks or aerated concrete - are not the be-all and end-all in the attic; how could they be, at thicknesses of 11.0 or 17.5 cm. There is a good reason why there are providers who offer non-load-bearing interior walls in lightweight construction above the ground floor. This way, there are no issues with material mixing. Rhineland regards

And then you have no material mix? In addition, lightweight walls are the worst choice acoustically - even when double-planked. We have calcium silicate everywhere to ensure uniform settlement behavior. In addition, the soundproofing is higher; corresponding doors are installed with us. Nevertheless, those remain the weak point...

In addition, lightweight walls are the worst choice acoustically - even when double-planked.

Says who?

We have calcium silicate brick everywhere, in order to have uniform settling behavior. In addition, the sound insulation is higher; appropriate doors are installed here. Nevertheless, those remain the weak point...

You are convinced of what you have built/had built; that is good ... for you! But that does not mean that CS is the be-all and end-all for everyone.

Rhenish greetings

I’m not saying that either – but acoustically it’s certainly the best solution of all the wall constructions described here – or do you want to dispute that?

Regarding lightweight walls: I’m saying it – not just read about it, but from experience. We had a double-plastered, DOUBLE lightweight wall as a partition to the other apartment in the living room. One floor above was a normal KS wall – that was a clearly audible difference. And unfortunately a big annoyance, which is why I certainly wouldn’t install something like that in my house...