Experiences with insulation composite systems from different manufacturers?

Where there is no plaintiff, there is no judge. I have already written that the "problem" would not personally bother me much.

Where there is no problem, there is nothing to complain about.
The client has a small problem here, insofar as the manufacturer is out of warranty (and the processor steps in) – usually, but not always, the manufacturer would be the more insolvency-proof party, making the claim against them consequently more valuable. But whoever has a site manager instead of a "construction supervisor" avoids this risk preventively.
It is unlikely that a building authority would make a big fuss: a demolition would already be challenged in the stage of threat due to disproportionality, and in the highly unlikely main proceedings, an expert could prove that under the microscope it is essentially the exact same stuff with only a different order number (in the end, it would be a very costly affair for the building authority to ask for this slap).