Which masonry is suitable for noise level range III

These bricks are ALWAYS to be discouraged. They are really soundwise hazardous waste.

I don't know much about this, but why is it advised against using air-filled bricks here? A brick is heavier than a Ytong stone, so it should also achieve better sound insulation than Ytong. Or am I mistaken?

I don't know much about this, but why is it not recommended to use air-filled bricks here?
A brick is heavier than a Ytong block, so it should also achieve better sound insulation than Ytong. Or am I mistaken?

Yes, you are mistaken. Ytong is similar but has the advantage of not being hollow. The uninsulated bricks act as resonators like in a guitar. Every noise, even inside, becomes louder and is transmitted from room to room. Especially bad from the upper floor to the ground floor. There might be people who are not bothered by this, but it is something you should know.

Our contractor will construct the wall structure, even if we build in LPB 3, as follows by default:
Two-shell masonry consisting of: 17.5 cm aerated concrete plan blocks as inner shell, 14 cm core insulation, (2 layers of 1x6 & 1x8 cm KD boards, thermal conductivity group 035), 2.0 cm air layer, facing stone 11.5 cm (NF or DF), jointed, including masonry connectors made of V2A steel, vapor barrier from Ceresit BT 21 sealing membrane or equivalent. This results in a total wall thickness of approx. 45.0 cm for facing constructions.
No idea if this is good or bad. I think it’s probably among the cheapest?! :rolleyes:
At least on most construction sites here, I see that they use aerated concrete.

Facing brick 11.5 cm (NF or DF)

I wouldn't overdo it and would take NF (twelve courses per meter), with DF it would be sixteen.

This results in a total wall thickness of about 45.0 cm in facing constructions.

The thickness means the thickness, not force, haha. 45 cm is 4 cm less than 49 cm, especially in this case with the easily sawable aerated concrete, I would then set the facing bricks in the standard module rhythm and let the structural wall shell protrude by 4 cm accordingly.

The strength means the thickness, not force, hehe.

Crazy :oops: the scanner somehow turned total thickness into total force. Everything else you wrote are abbreviations that I can't understand at all :D

Everything else you wrote are abbreviations I absolutely can't start with

NF = normal format, stone height 71 mm plus joint = twelve rows per meter wall height, DF = thin format, stone height 52 mm plus joint = sixteen rows. So DF means one third more bed joints and one third more mason hours for the facing shell. Moreover, with exposed or facing masonry (in my opinion even in random bond!) it is noticeable if the wall (section) lengths do not fit the octameter rhythm. Fantasy dimensions will bite you on the feet at the latest when facing. With well-cut aerated concrete this does not matter if the rhythm is broken here to maintain it again in the facing shell. With other masonry units I would advise against such rhythmically inconsistent total wall thicknesses.