Aerated concrete / brick / monolithic construction - who is familiar with it?

The 30 cm works well. We also have it, monolithic, if you don’t use too much glazing. Our combo: 30 cm Ytong, Weber lightweight plaster, filled with Styrofoam beads, on top Weber finishing plaster plus silicone paint. Triple VERKA profile windows, 0.9 U-value, solar for hot water plus Junkers gas boiler condensing version. Underfloor heating. The house is warm, thermal protection calculation easily passed. Energy Saving Ordinance 2016.

House is warm, thermal insulation calculation easily passed. Energy Saving Ordinance 2016.

Where are you at with the calculation traded? kwh*(m2/a)

The insulation value of the 30 cm stones is in my opinion completely fine. First year with DHW generation and cold winter gas costs about 45€ per month (129 m2, 4 people)

Where did you end up with the calculation (kwh/(m2*a)? Is the 30 cm stone far from the KFW 55 standard?

It would now be interesting to know why you have to achieve sound insulation class 3. Main road or city location?

It is the city location. We also have the decentralized system, is it really that loud because of it?

to your first question: I am not familiar with the calculation, I was not interested in it. The main thing is that the requirements are met.

We have the decentralized e2 from Lunos. And I wouldn't say it's a problem, but the sound clearly and distinctly passes through the fans into the house. There are external covers to improve sound insulation, but they are very expensive. For us it is already okay, but we usually really don't have a noise source here. In the city, I would want to avoid this solution if possible.

You install windows that meet increased sound insulation requirements, so I assume you will regret the fans later!

The promotion of the KfW70 standard was therefore discontinued because it has been effectively mandated by law since the Energy Saving Ordinance 2016. Of course, there is no extra incentive for mere compliance. You can now make the plaque yourself that your house meets KfW70 – there just isn’t any money for it anymore.

We achieved a monolithic KFW55 with 36.5 aerated concrete @ 0.08 lambda value in 2013/2014.

The decentralized Lunos E2 with heat recovery is quite nice, but if a device did not make hammering noises during operation, I would be more convinced of it (after 2 years this started).

The large aerated concrete construction company was also our choice. However, many customers were gradually cheated, as a lot was saved on labor cost advantages, which negatively affected the quality of the work. The franchisee no longer exists either. I closely accompanied the construction and therefore there are no defects in the finished state.

I can only recommend the monolithic construction method.