ᐅ New Construction: Which System Should I Choose for the Roller Shutter Box? Any Tips?

What is advisable regarding future repairs and from the perspective of thermal insulation?

Shutters 😀

For repair work – add-on structure.

For soundproofing and thermal insulation – cantilevered extension.

I get the impression that you would like everything specially prepared just for you. Especially considering your other questions – how about first reading some information here and elsewhere, and then asking specific follow-up questions?

Other threads are partly outdated, which is why this current question is being raised. As is well known, new insights regularly emerge in the technical field.

No, not really... especially when it comes to roller shutters.