Planning and execution are wrong. Norm ignored? New construction roller shutters!

Good day.
Please excuse me for describing my problem in this forum as well.
I hope to receive an answer from a planner/architect.

Problem:
Possibly non-compliance with the guideline "Connections to windows and roller shutters with plaster 2nd edition 10/2010".
Our aluminum roller shutter guides were mounted directly onto the plaster!
A two-part design (guide rail and wall compensation piece) was not used.
As a result, light now shines in due to uneven plaster!
In addition, the guide rail was not pulled down to the windowsill but stops about 2 cm before it! Light also shines in here!

The roller shutter installer (who installed these as part of a turnkey multi-family house)
tells me this is correct. Everything is according to standard!
Another roller shutter installer (also a specialist company) says this is not according to the above-mentioned standard.
A two-part guide rail construction must be used by the window manufacturer or especially by the roller shutter installer
(so that the guide rail can be easily removed in case of roller shutter defects). If screwed directly to the wall, it will no longer hold properly!
In addition, the guide rail must be pulled down to the windowsill. The argument of heavy rain has no influence here!

Now I am stuck between two opinions as a layperson! Who is right? Expert opinion?

How should I behave? All windows in this new building were executed this way....

Thank you very much
erika

Hello Erika, how many subforums do you still want to discuss the topic in? Everything has already been said in the other thread. If you are not satisfied with the work, you must write a complaint about defects and, if necessary, take the path through an expert and court. You could also respond to the questions asked there. (What does the general contractor say about it? Please post pictures from a greater distance.)

here is the main thread:



pointless to create multiple threads since the forum is not so big that anyone would overlook anything :)

we can open a separate account for Mrs. Bauer...........