I would be very interested regardless of the OP and I think others here would too.
Okay, I will gladly take a look at it during my vacation.
Really, who then? Who usually does it and who could do it?
It depends on the water demand. In my opinion, the window installer can only ensure resistance to driving rain. However, I believe more in properly "sealing" the window and connecting it to the base sealing (also in the case of ground moisture). This can be done with KSK, liquid plastic, or KMB and is usually done by a roofer. I know that this is often handled differently in single-family home construction, but on the other hand, it is also a weak point then. It could also be that the shell builder directly extends foil seals if the cladding comes in front of the window, but as I said, I am not a fan of that, although there are certainly other opinions.
Really? Why? I always hear the recommendation to do the painter first (completely), then the floor (completely), then the doors, or what do you mean by finish? Just the acrylic joints and corners that were forgotten?
True, I was a bit too quick while writing. The wallpaper should also go in beforehand, and then only the baseboard as a finish. Then the acrylic. You just have to make sure that the parquet installer does not cut inside the house; the dirt cannot be removed afterward. If the floor is well protected, wallpaper can of course be applied after the floor and then finished with the baseboard. Regarding acrylic joints: I would always budget enough money for joint work. In the end, there are many areas where cracks develop (drywall connection to solid wall), element ceiling to plaster with trowel cut, etc., where joints become necessary. (Brief aside)
And then interestingly: When does the staircase go in?
To be honest, I'm not the expert here because I come from multi-family residential construction, and we install massive staircases during the shell construction. If the staircase comes from the carpenter, in my opinion it should be installed pretty late. If it is a reinforced concrete staircase that receives the coverings, it typically belongs to the shell construction. Best regards, Jann