After WDVS, roller shutters rub against the box.

Anyone else got a tip?

If your service providers really turn the problem into your problem and cannot find a solution among themselves, shifting the problem back to the craftsmen will certainly help.
Write to each party involved that you do not agree with the defect and set a deadline for rectification. Announce to each party that you will withhold an amount otherwise. They can then dispute with you or among themselves or come to an agreement. I consider the latter to be likely.

Hello, it has already been 1.5 years with BenjaminJ, he has probably already responded... We are currently facing the problem. The window installer has already been fully paid, many defects are still present with the facade company, and they have not yet issued a final invoice. About one third of the contract amount is still outstanding here.

Good evening,
we were "lucky" enough to have a material defect occur in the reinforcing adhesive of our plaster system, which caused countless cracks in the house. The insurance of the plaster manufacturer took over the matter, and the entire plaster was removed down to the ETICS or, in uninsulated areas, down to the masonry. Since this allowed the problem to be resolved well, the plasterer showed great care during the re-plastering and wedged the roller shutter boxes before applying the plaster so that they would no longer deform toward the slats. As a result, 90% of the roller shutters were freed, and where it was still too tight, well, the roller shutter box was really adjusted again. Even though our plasterer is a good company and the boxes are unfortunately absolute junk (deformable with a little finger, impossible to plaster without deformation without wedges), I think it was ultimately his fault.
Also a good indication: After removing the plaster and the glued panels on the roller shutter box, the roller shutters were mostly free-running again without sanding.
I wish you a lot of patience, and my experience is unfortunately that a letter from a lawyer carries more weight than self-imposed deadlines :(

Best regards
Benjamin

Thank you for the reply! That was a lucky coincidence, if you can call it that with all the trouble. ;-)

Yes, we already have some construction experience and this is not the first point of dispute... I also suspect that the plasterer is to blame. The defect appeared on six roller shutters - if it had been like that from the start, surely not so many constructions would have left the workshop of the window company...

Dear BenjaminJ, can you please explain again what an Auskeiler is and what you mean by "und die Rollladenkasten vor dem Putzaufbringen ausgekeilt"? Presumably, this was not done in our case either...

I suspect the surface where the plaster and the [wdsv] rest would be reinforced during the plastering process to prevent it from bending.