ᐅ Which interior wall material and thickness provide good sound insulation?

nils1985 schrieb:
Hello, I want to bring this thread back up from the past because I’m also interested in the material mix. For the exterior walls, the offers include aerated concrete, Ytong. The interior walls are supposed to be made of sand-lime bricks according to the offers. Is this mix a bad choice? What wall thickness is recommended for the interior walls? They offer 17.5cm (7 inches) for load-bearing walls and 11.5cm (4.5 inches) for non-load-bearing sand-lime bricks. Is the sound insulation sufficient with these wall thicknesses?

Hello,
We are currently dealing with this topic as well.
Check the Ytong website; you can download the Ytong construction manual there. Chapter 5.5 deals with sound insulation and I found it very informative.
Our local Ytong prefab house partner advised us against using sand-lime bricks for interior walls. Their reasoning: The climate-regulating properties of aerated concrete are much better than those of sand-lime bricks, which improves the comfort level in living spaces. They also claimed that aerated concrete can supposedly achieve similar sound insulation results as sand-lime bricks. "It is even used in hospitals, etc." This may all be true, but for the same wall thickness, the sound insulation performance certainly does not match. Maybe with double the wall thickness...

We have calcium silicate blocks everywhere; when the children are making noise, I can hear it even through the room door.
Otherwise: what should a manufacturer write? Just have fun and call them to ask how the block is “climate-controlled” — they probably mean the higher insulation value and the associated warm wall; which is obviously nonsense, since no one (anymore) builds with calcium silicate blocks without insulation.

And then you lose living space, which can quickly amount to 5-10m² (54-108 sq ft), with the same exterior dimensions and depending on the architecture...

BeHaElJa schrieb:
We have calcium silicate bricks everywhere; I can even hear the kids making noise through the room door.
Otherwise: what is a manufacturer supposed to say? Have some fun and call them to ask how the brick regulates climate – they probably mean the higher insulation value and the resulting warm wall; which is nonsense, as nobody (anymore) builds calcium silicate brick walls without insulation.

Calcium silicate bricks are supposed to be excellent for indoor climate...
When I compare with other houses (older buildings, prefabricated houses, or aerated concrete), I cannot find any disadvantages regarding indoor climate in our house; rather the opposite compared to SOME houses.

Sand-lime brick is heavy and dense, with a high thermal mass, meaning it heats up slowly and cools down slowly. Otherwise, I don't think sand-lime brick has any particular comfort benefits.

Exactly because of the thermal mass, the temperature does not change as quickly, which is quite comfortable. Recently, we had a power outage all night, and in the morning there was no noticeable change in temperature. In a prefab house, it would probably be different in winter...