Which stone / brick to use in solid construction

All budget providers with cost-effective walls. The house naturally holds up as well, but sound insulation is poor in all mentioned.

Both equally good or rather equally bad. We live in Ytong. I am very satisfied with the wall. Hardly any cracks, nicely warm, easy to attach things to (wardrobe and tall cabinets and so on), - only the stone is sound-permeable, which doesn't bother us much in a dead-end street of a purely residential area.

What does soundproof mean? Inside between the rooms or from the outside? We are also building with 36 cm Ytong on the outside and 11.5 cm on the inside. This issue is still on my mind.

Then do KS inside. At least if you have Kiddies.

I want to describe the feeling more closely. Inside. When I watch TV in the guest room and she is in the living room, it doesn't bother at all. But if one of us wants to listen to music a bit louder, the other would not be unaware. From outside you can clearly hear the garbage truck, a car a little. Birdsong not at all. K.

So bad ? What matters to me most is the noise from the bathroom or whether every conversation and movement can be heard?

Sand-limestone is disproportionately expensive with the general contractor - likewise, 17.5cm Ytong interior walls already cost an additional 6500€...