Hello,
I have a question.
The window installer forgot to shorten the frame back then (see picture).
By now, the external thermal insulation composite system (ETICS) has already been glued on, and only afterward did I notice it. The frame was shortened afterward, which left a gap.
I had to call the plasterer to attach a piece of perimeter insulation there.
He charged me about 100€.
Now my question is: I understand that I shouldn’t have to pay since I did not cause the mistake.
Who is liable for this, the window installer? Or should the exterior plasterer have noticed it earlier?
The fact is, I am not willing to pay the 100€.
Thank you very much in advance

I have a question.
The window installer forgot to shorten the frame back then (see picture).
By now, the external thermal insulation composite system (ETICS) has already been glued on, and only afterward did I notice it. The frame was shortened afterward, which left a gap.
I had to call the plasterer to attach a piece of perimeter insulation there.
He charged me about 100€.
Now my question is: I understand that I shouldn’t have to pay since I did not cause the mistake.
Who is liable for this, the window installer? Or should the exterior plasterer have noticed it earlier?
The fact is, I am not willing to pay the 100€.
Thank you very much in advance
He who orders the music pays.
Since we do not know with whom you have concluded which contracts, and possibly you are building with a general contractor (GC) or trade builder (TB) – in that case, you do not have the right to summon the craftsmen to the construction site – we cannot give you a definitive answer.
Best regards in brief
Since we do not know with whom you have concluded which contracts, and possibly you are building with a general contractor (GC) or trade builder (TB) – in that case, you do not have the right to summon the craftsmen to the construction site – we cannot give you a definitive answer.
Best regards in brief