Wall construction: 15 cm calcium silicate brick plus 25 cm external thermal insulation composite system (ETICS)

Better have the requirement of 24cm insulation – even for KfW 40 – checked. Sounds like a waste.

Here it is even supposed to be twenty-five centimeters, and to me that sounds exactly like "wall construction from the U-value calculator for KfW xy."

It is supposed to be twenty-five centimeters here, and that sounds to me exactly like "wall construction from the U-value calculator for KfW xy".

He wrote 25 cm, but for the ETICS. The plaster also belongs to that, especially since I have not encountered any odd material thicknesses so far.

He wrote 25cm, but that is for the ETICS. The plaster is also included in that, especially since I have not encountered any odd material thicknesses so far.

Yes, that is exactly what I mean. I will speak to the architect again tomorrow to see if the KS wall can be increased to 17.5 cm.

He wrote 25 cm, however for the ETICS. The plaster is also part of it, especially since I have not come across any odd material thicknesses so far.

That the marketing guys haven't thought of that yet: monolithic the plaster would also be applied directly onto the stone without an air gap, you could actually call that a monolithic composite system *LOL*

I will talk to the architect again tomorrow to see if the KS wall can be increased to 17.5 cm.

Yes, it can, and that is probably already the reason for the 15 cm: namely, that you get a nicer 15 cm nominal price and pay extra for 17.5 cm ;-)