New construction - Is insulation worthwhile? Experiences?

Feel free to ask your plasterer. He would certainly be very happy to sell you an [WDVS] system. Then he can charge five times as much as a simple lime cement plaster and doesn't have to carry so many bags.

I have also installed the [T9] in 36.5 cm. An excellent stone. Put a proper lime cement plaster on the inside and outside and you have about 40 cm wall thickness with healthy physical properties. Alternatively, a thermal insulation plaster (light plaster) would also work.

You don't need more than that. Your house remains largely breathable and regulates moisture. You lose these properties with the [WDVS].

And although today the polystyrene is mostly glued with perimeter foam, the prices for it keep rising. Then all the rails, mesh, adhesives, anchors, and who knows what else. Totally exaggerated.

I wouldn't do it.

You don’t need more than that. Your house remains largely breathable and regulates moisture. You lose these properties with the ETICS.

Even your house only has these properties in the marketing brochure. Sorry.

Then he can charge five times as much as for a simple lime cement plaster and doesn’t have to carry as many bags.

That too is untrue and straight out of fairy tales.

Insulation materials are getting more expensive, yes, due to demand, also because of renovation of existing buildings. In new construction, ETICS has been the dominant wall structure for years.

But be that as it may, doubling up a monolithic exterior wall of a new building under construction with ETICS is not sensible.

In new construction, the ETICS has been the dominant wall construction for years.

Is that really the case? In our new development area, they all look like ours from the outside. At least those that are not yet plastered. From the outside, you usually only see these Ytong blocks. I haven't seen any composite systems yet.

Not here either. 4 times prefabricated house, 2 times filled bricks and once us with Ytong. Dominant is an ETICS of course in residential construction as well as offices, etc. with reinforced concrete walls

Is that really the case? In our new development area, all the houses look like ours from the outside. That is, those that haven’t been plastered yet. From the outside, you usually only see these Ytong blocks. I haven’t seen any composite systems yet.

It is hard to find valid statistics on this. You can find something about the materials used at destatis, but for example, mentioning "brick" or "aerated concrete" doesn’t yet say whether it is monolithic or not. For example, Town & Country normally builds aerated concrete + ETICS. So for such a statistic, it is rather difficult.

Of course, aerated concrete + ETICS makes little sense. It combines the disadvantages of both variants and has the only advantage that aerated concrete can be easily cut to size.