Minimum room height in new construction

Demand .... how should we know that?

True, you weren’t there => That’s why I mentioned above that we had also agreed on "flush with the ceiling" in writing during the technical sampling. And "flush with the ceiling" should be clear, shouldn’t it!?

Regards, scooter.

The "defect" (if it is one) is no longer correctable, is it? So how should a solution look for you?

As (described above):

"Therefore the question: Could the counter battens (between the foil under the insulation and the three-layer panel) be omitted from a construction perspective? And can we demand that?"