Insurance case when help is provided by friends

Do we have a chance to get the damage reimbursed from the helper's liability insurance?

First of all, have the damage reported immediately.
By your friends. That's what liability insurance is for. Photographic documentation of the damage should be a matter of course.
The liability insurance will tell you what else it needs.
It's definitely worth it for expensive windows.
Or your friends pay cash ;)

Try using a so-called "magic eraser." They are applied damp. These things really work wonders in some cases. They only cost a few cents... so the try costs almost nothing.

they only cause additional scratches on glass.

they only cause additional scratches on glass.

On plastic, wood etc.. yes… but glass is hard enough. I have used it many times..

So this is not a clear-cut matter, because with these favors judges apparently assume a tacit exclusion of liability. Then there would have to be gross negligence or intent, which probably won't be the case.

Of course, you can check with the insurance to see what they say. If they cover the damage, then it's okay. But I don't want to rule out that the "question of fault" might still be raised there; the friend wouldn't just have sprayed for fun. Rather, he most likely had the "order" from you for it, whether he would then have had to make sure everything was properly masked off himself, I rather don't believe.

To some extent, you have to take some responsibility yourselves and should definitely be glad if the insurance pays. However, it is also not impossible that they argue with the tacit exclusion of liability, and in that case you yourselves would be responsible. It’s not a harsh accusation either, since this can certainly happen on construction sites, but in principle you should have made sure the windows were masked off. Or did he start spraying on his own initiative?

I just checked again, Clima Silikatgrund was used. Maybe someone still has a tip on how to get this stuff off.

With stuff like this, don't hesitate to simply call the manufacturer. I have personally experienced that they can be very helpful; in fact, a field representative once came by here due to a processing problem.

And what do you want to report there? Do you want new windows or new glass now? Is that really proportional?

Sorry that it turned out that way. I would also ask the manufacturer if they have any tips. I messed around here during the renovation with primer, it didn't come off from the window or the sill for 5 years (not even from the front door threshold). It’s not so bad for us because we’re replacing it anyway and that was always clear. For you, it’s all the more annoying, of course, when you know you’re going to be looking at it for 30 years otherwise.