Y-Tong (aerated concrete) - quality building material? (sound insulation!)

It is a conflict of objectives.

Calcium silicate brick has mass: sound insulation.

Aerated concrete (Ytong) has air inclusions: insulation.

Both are not possible in my opinion.

I live in Ytong. Monolithic. Only plastered. That is ok, house warm in winter, cool in summer, pleasant comfort, what is supposed to be cheap or lousy about the stone, I don’t know. It is a good wall construction, just! The sound insulation is not great, Ytong is just a lot of air. You have to take sand-lime brick for that, but then it needs insulation because it unfortunately insulates heat poorly. There is always something. Poroton is also not good without insulation, but good in sound insulation, and those hollow bricks with Styrofoam in the middle, try to screw something onto that.

As always, there is no optimum; you have to choose what is important to you.

Thank you for the contributions - it's actually a pity that soundproofing and excellent thermal insulation are not possible. Can sound-reducing measures still be taken if we do decide to stay with Ytong?

We currently live in a house built in early 2017 with a timber frame construction, three apartments in the house, and frankly terrible soundproofing (investment property) and wonderful double-glazed monstrous window fronts that basically keep out nothing. Sometimes we feel like we are sleeping on the street.

Is Ytong really that bad at soundproofing? If it is as mediocre as it is now in timber frame construction, then the decision is easy...

On the homepage, the ecological and healthy living climate is often emphasized. That means: "Aerated concrete absorbs only a little water and stores this absorbed moisture only briefly in the stone. When the relative air humidity decreases, the moisture is released again – thus the room climate is automatically and naturally regulated."

In addition: "Thanks to its pore structure, Ytong has a high ‘internal damping’. When planned and executed properly from an acoustical point of view, a Ytong house provides effective soundproofing against external noise."

Is this all nonsense? This is driving us crazy – as I said: I love this forum!

Yes, these are simply just advertising texts. I would argue that soundproofing Ytong is worse than modern wooden studs.

If you want Ytong thermal insulation and good soundproofing together, you have to use 24 cm Ytong, then mineral wool, then clinker. The clinker is solid, the wool insulates, the Ytong insulates, warm, tight, quiet, just not quite cheap. Thats it.