ᐅ Masonry using Ytong blocks, 24 cm or 30 cm thick, for a single-family house?

Hello building experts,

It looks like construction can start soon. I was convinced by the regional TuC partner regarding the overall concept because of the monolithic construction method.
In the "basic package," the masonry is made from 24cm (9.5 inches) Ytong blocks. Does anyone have practical experience with thermal and sound insulation? The residential location is very quiet, traffic-calmed, and has almost no through traffic.
Alternatively, I am considering a build with 30cm (12 inches) blocks; I still need to find out the additional cost.

Best regards,
Ruska

monolithic.. 24? 30? I definitely wouldn’t build with anything larger than 36 centimeters (14 inches). If anything, go for 42 centimeters (17 inches) or skip the whole Ytong nonsense!

Steffen

PS: We have 36 centimeters (14 inches) Ytong stuff..

Steffen80 schrieb:

Monolithic.. 24? 30? I wouldn’t even build with 36 anymore. If anything, go for 42 or just skip the Ytong nonsense altogether!

Steffen

PS: We have 36 Ytong rubbish..

Thank you for the quick reply. Could you please explain your very clear opinion so I can understand your reasoning?

Thermal insulation is excellent, but the rest is poor. Soundproofing, load-bearing capacity for heavy cabinets, burglary protection, chemicals, etc.

If we were to build again, we would choose a double-wall construction with Poroton on the outside and calcium silicate blocks on the inside, with an air gap in between.

These are varied opinions. So, is it quiet where you are? It is for us as well. We live in a 30cm (12 inches) Ytong monolithic structure. The house easily meets the energy-saving regulations standard with a gas boiler and solar thermal system, and it would be around KfW 60, if that existed. Sound insulation isn’t great, but we’re located on a quiet dead-end street. Load capacity for furniture? Well, fixing kitchen cabinets and the washbasin was no problem, the coat rack also holds up.

Chemical aspects? I don’t lick it, and the stone doesn’t have any odor. What Steffen means, I don’t know.
Burglary protection? Yes, you can break through the wall if you drive a Unimog into it. Then it will collapse.
Etc. What he means by etc. is unclear to me. But Ytong has obviously done something to him. Maybe the Ytong construction site calendar with the thick white-whatever wasn’t delivered at Christmas, which he was so looking forward to?
TundC want to achieve all that with 24cm (9.5 inches) too? Hard to understand how that works. Ask them, the 30cm (12 inches) version is a good choice, I tell you.
PS. Get yourself added to the Ytong newsletter list for the calendar…

We are currently building with 24cm (9.5 inches) walls. Legally, there were no issues at all... we have chosen an air-to-water heat pump, which is considered “better” regarding energy saving regulations, but apparently gas plus solar is also acceptable (I haven’t looked into that in detail since the air-to-water heat pump was already our definite choice). We are building in a quiet area, so there is no disturbing noise outdoors... meaning soundproofing is less important there.

By the way, we are also building with Town & Country.