So the "plasterer" here is a local painter's specialist company, they all speak "German" ;) and we know them personally. They really did a great job, so far no one has been able to find any faults in the work. Our house builder even traveled here specially and checked out the top installed window sills. With wood fiber ETICS this is an extremely important point.
And the weather was simply against us this year when it came to plastering. Too wet, too cold, too unstable.
I completely stayed out of the green roof (except: OK, we'll do it) I have to ask about it tomorrow at breakfast, but some people here do have a green roof.