ᐅ Is a 30 cm aerated concrete (e.g., autoclaved aerated concrete) wall sufficient?

sarajevo83 schrieb:
According to the data, timber frame houses even perform better in sound insulation than aerated concrete.

Not "but" – it’s precisely because of timber framing that you can achieve excellent sound insulation with the right materials.

nordanney schrieb:
Not "but" – this is exactly the case with timber framing, as you can achieve excellent sound insulation with the right materials.

Currently, Streif Haus offers all interior walls with double-layer drywall, and the exterior wall construction also seems very robust to me. Several homeowners I have spoken to have confirmed this. Complaints about sound insulation were mainly directed at interior walls, if at all. With double drywall and better doors, this should improve significantly. Therefore, I believe I am in a much better position there compared to YTONG.

sarajevo83 schrieb:
For us, it was Elbe-Haus offering a 30cm (12 inches) aerated concrete YTONG exterior wall.
Exterior walls made of aerated concrete SWE 30.0 cm (12 inches), lambda 0.09 + silicone resin plaster.
The more we look into it, the more we are moving away from it.

... - but why?

sarajevo83 schrieb:
Thanks for the info! Although I already live in an aerated concrete house and the sound insulation is already quite poor, so we definitely didn’t want to build with it anymore. According to the data, even timber frame houses are better at soundproofing than aerated concrete.

I have surely also mentioned that I cannot confirm the criticism of aerated concrete from my father’s experience with residential buildings and my own commercial buildings. Any building material can be installed incorrectly, especially at component connections where mistakes are unfortunately common.

sarajevo83 schrieb:
At Streif Haus, I’m currently being offered double-planked interior walls, and the exterior wall structure also seems very solid to me. This is also reported by some other homeowners I spoke to. If there were any complaints about sound insulation, it was only about the interior walls. With double cladding and better doors, it should be much better. That’s why I think I’m in a much better position there than with YTONG.

Regarding the "value" of simply doubling the wall cladding, I have already expressed my opinion. And if anything, I see the “goats” moving up into the top league rather than Streif Haus.
If I remember correctly, you also have Hanse Haus as an option, and there is also my offer to personally support your project (plus my recommendations for several colleagues in the prefab house sector, namely Ms. Wächtersbach and Messrs. Beuler, Freyermuth, and Zink).

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11ant schrieb:
... - but why?

Because I currently live in an aerated concrete house and know someone else well who does too. The sound insulation is terrible and absolutely not recommendable. Maybe the quality of the blocks has improved by now.

11ant schrieb:
If I remember correctly, Hanse Haus is also an option for you

Yes, wait and see about Hanse Haus, but so far nothing comes close to Streif Haus. By the way, Köln is playing in the first league, right?

sarajevo83 schrieb:
Maybe the condition of the blocks has improved by now.

How would that work physically? Good insulation requires trapped air, good soundproofing needs mass and preferably no air cavities. Since aerated concrete is produced by introducing air pores...

By the way, noise mainly enters through windows, shutter boxes, and on the upper floor through the attached ceiling to the unconditioned attic. Unless you live right next to the A9 highway or in the flight path of Frankfurt Airport, a 36.5cm (14.4 inches) aerated concrete wall is more than sufficient.

MachsSelbst schrieb:
then a 36.5cm (14.4 inches) aerated concrete wall would be more than sufficient for you.

Unfortunately, only a 30cm (11.8 inches) wall was offered.

I would have felt more comfortable with the 36.5cm (14.4 inches) one. Let's see what the additional cost will be.

However, there is still the consideration to prefer wooden studs over aerated concrete.