Task of the window builder or not?

Hello everyone,

Today the plasterer came for an inspection.

He looked at the roller shutter boxes and said that 1-2cm are missing so that it is flush with the masonry and that the window installer had to do this.

This now needs to be compensated.

He called a site manager who confirmed it.

I then called the window installer and reported this.

He said: someone has to pay for it, no matter who has to do it.
I: I don’t see why, if it’s your task.
He: we will find a solution, I will consult with another site manager to see how it is legally regulated.

He is currently still on vacation, the call had to be quick. He wanted to get back to me in a few days.

Is that really the case? (there is nothing about this in the window offer.)

Laugh! I already had this topic today! When it comes to costs, these are so-called "Sowieso" costs, meaning costs that would have been incurred anyway. If the service is not described anywhere, someone else has to perform it additionally. I think the window maker is better suited here. However, he could or should have pointed out that his box is too small.

Lol! I already had this topic today! When it comes to costs, these are so-called sunk costs, meaning costs that would have been incurred anyway. If the service is not described anywhere, someone else has to perform it additionally. I think the window installer is better suited here. However, he could/should definitely have pointed out that his box is too small.

At that time he only said: the plasterer then has to figure out how he wants to handle it.

The plasterer today just said: I only do plastering!

In retrospect, it sounded totally funny.

The window installer will surely solve the problem better.