Soundproofing upper floor partition walls

Hello,

If someone now builds/has built a massive house, they should normally be able to assume that you can't hear it when someone whispers or reads quietly in the neighboring room. Saying "their own fault" I find inappropriate.

I never claimed "their own fault" at any point; I referred to the provider and that the original poster could have asked.

I don't know any builder or potential buyer who hasn't already heard or read about calcium silicate bricks; I encounter it in almost every initial meeting. This topic would have naturally led to a conversation about soundproofing and 11.5 cm walls.

Rhineland greetings

How you put it is beside the point, but to say he should have known and that he chose it that way basically means he is to blame himself. It doesn't matter anyway, what is important now is how to get the cow off the ice.