Bauhaus concrete villa with core insulation - experiences

which picture do you mean? The one from today or yesterday? The one from yesterday was the bedroom.

Which pipes do you mean? The ones on the floor? Those are the copper pipes of the underfloor heating. The distance looks a bit misleading because of the wide-angle lens. But the actual distance is indeed greater than usual. This is due to our floor. We don’t have/s will not get screed but cast asphalt or bituterrazzo.
That means next week a thin layer of cast asphalt will be applied to firmly glue the pipes to the floor (thus ensuring that you won’t see any indentations even on large surfaces). Then another thin layer with additive. At the very end about 3mm will be ground down.
This way the underfloor heating lies very flat right in the final covering and the thermal properties of the asphalt are better. Hence the greater distances.
There are no visible joints on the entire surface, it is waterproof, warms the feet, is slightly springy, very durable... The surface can be ground to different levels of gloss or slip resistance classes. We will also have the covering in the shower. After one night the covering has cooled down and is immediately fully loadable. No preheating or drying necessary. Also no additional moisture enters the house.
Because the covering is applied at over 200°C everything on it must be simply adapted. Plastic would just melt. This is also one of the reasons why the windows haven’t been installed yet.
Where the underfloor heating is omitted the kitchen unit will be placed.

Here’s an example picture (but the floor is scratched and not maintained) That was at our supplier.
You can find more examples on Google under Bituterrazzo.
The appearance can be influenced by the additive (grain size, color etc.). The base color is always black.

Cool, looking forward to it!

The pipes on the ceiling are for the ventilation. Quite a bit has already been written or philosophized about this system. Our controlled residential ventilation is heavily oversized (partly 10 times) compared to the normal DIN design. We also have almost no overflow areas but separate supply and exhaust air. This allows us to achieve different air exchange rates in different areas. Only with large air exchange rates can cooling be done effectively. We have a central climate unit which can also function as a heat pump. In addition, there is also a cooling buffer. Theoretically, we could also use it to heat something. But this is not necessary as we have a large gas boiler. This exceeds the heating demand of the house by a factor of 2-3. This peak power is needed in case we want to heat the pool. The pipes on the wall are supply and wastewater for the freezer, dishwasher, steam oven, coffee machine.

Always exciting to read your reports. Everything is very well thought out and far from the mainstream. I like it...especially the technical details of your house.

Are more photovoltaic modules going on the roof? You still have space and you can surely use the electricity yourselves more than well...

Thanks No, there will be no further modules. The system has 9.920 kWp. Even if it is not profitable, we have a system with storage. The offer was very good... If you go over 10 kWp, it only makes sense if you exceed it significantly. Since distances to the attic etc. must also be maintained, we could not add much more than the current modules. We will operate the system with dynamic active power reduction. Since we always have a high base load, the system can run at 100%. So at least there is no hard 70% capping because self-consumption is taken into account. We could certainly use more photovoltaic power. Our other roof sections are too small, partially shaded, greened, used otherwise, etc.

The men really worked hard today. The underfloor heating has been fully installed throughout the entire house. They are currently cleaning up together. Actually, an extra day had been planned.


The nice weather was also used to finally put the photovoltaic panels on the roof. Mounted on racks but not yet finally wired.

why did you have the roof built with a welded membrane??