Thanks already for your answers.
Since my site manager played down the issues a bit to calm us down, I contacted the well-known Institut in Rosenheim. I actually wanted a site inspection, but they had no time at short notice, so I sent photos and used the paid telephone service. Of course, all the errors/deficiencies were confirmed there. (I can only recommend the service, precise and understandable.)
After I confronted our site manager with the facts and mentioned the abbreviation of the institute, things quickly started moving.
The errors will of course all be corrected and, of course, it was only misunderstandings and communication errors. What I liked was that the managing director of the window company personally got in touch and assured that everything would be fixed. Let's see how they manage that.
In detail:
- Minimum joint widths (we still have some leeway downwards) are realized by thinner frame extensions at the bottom. The affected elements will be lowered slightly. I'm curious how they will solve this with the existing drill holes.
- According to the telephone service, two narrower compressible tapes are not permitted for a 20 cm window element and the joint cavity must be almost completely "filled"; window foam is permissible. Two compressible tapes stuck on top of each other to fill a wide joint are not acceptable.
- Sealing tapes will be corrected or redone. Compressible tapes folded around corners are also not allowed.
- Basically, special compressible tapes are permitted (with exposed concrete walls sealing tapes also don't look very good).
Yesterday, installation of the upper windows began and two new issues came up.
As already mentioned, we have large aluminum window elements. According to the window company, there are no thin aluminum frame extensions (doubtful!!). They are now executing this with plastic extensions. These are not visible because they are under the screed and ETICS, so it wouldn't bother us, but we are also not happy with it. How about the load-bearing capacity here? Can they handle that?
And it was found that the rough floor outside the tolerance. It rises about 1.5 cm from the stairs (FIX) to the window, over a length of 5.4 meters. Our site manager wants to correct that via the screed, max 5 mm over this length. Is that okay?