Y-Tong vs Concrete without extra insulation in practice (heating costs)

It could have been that there is a concept here that is expensive but saves energy for heating in the long run and thus protects the environment. You never know how advanced the technology is. Besides, it was also about the combination of winter->heating, summer->air conditioning

Yes, there is a sensible concept in connection with concrete, heating, and air conditioning. In this case, the concrete is used as a buffer in winter that stores and releases heat for a long time and as a cooled area in summer. It is called concrete core activation. The concrete core, as the name suggests, is not in the outer wall but installed inside, for example as walls around a stairwell or similar.

Regarding architecture with concrete and glass: Search for Brutalism – personally, I don’t like it at all, and after 20 years at the latest, the buildings look like they are from the ’60s, but there seem to be enough supporters.

It has already been answered. They might have concrete on the outside or inside, but in the middle there is always insulation.

Thank you very much for the detailed information. I didn’t know there is insulation in between. At first glance, it looks solid to me. Maybe I asked my question too complicatedly, but basically everything is answered for me now.

As my avatar name already suggests, we originally also had the idea of building with concrete. We had looked into two variants: a) Exterior wall built in three parts: concrete / insulation / concrete b) Monolithic wall construction concrete (where (clay) beads are mixed into the concrete to optimize the U-value) ... as far as I remember, this can be found under Liapor.

In Switzerland, many houses are built according to variant b (and it is a bit colder there). However, the wall thicknesses are then 60-100 cm. If you search for "single-family house near Heilbronn made of Liapor lightweight concrete," you will find (in my opinion) a beautiful example. There are also some data provided.

If it costs 200€ more per month, you can do that.

I am talking about 100€ per year!!! Same insulation values = same consumption.

Yes, there is a sensible concept related to concrete, heating, and air conditioning. In this concept, the concrete is used as a buffer in winter, storing and releasing heat for a long time, and as a cooled area in summer. It is called concrete core activation. The concrete core, as the name suggests, is not in the exterior wall but is built inside, for example as walls around a stairwell or similar.

Practiced in commercial construction for many years. In the private sector, rather rarely.

I am talking about €100 per year!!! Same insulation values = same consumption.

Even if it’s €100... Even if it’s €200... Even if it’s €300... Every single word is being scrutinized here, right?