Glue marks on parquet from parquet installers

The contracting party is initially certainly the publisher, but the warranty naturally transfers, so the end customer can also report defects. Your car example was good there... If you buy new in Munich, you can of course still claim a warranty in Rostock, you don't have to go to Munich.

The contracting party is initially certainly the publisher, but the warranty naturally also transfers, so the end customer can report a defect as well

Your car example was good... If you buy new in Munich, you can of course still report a warranty claim in Rostock, you don't have to go to Munich

That would mean for the parquet that I could also turn to another company, which would then assert the claims for me. I consider that unlikely.

For cars, this applies as long as it is a contract workshop. If I go to a mechanic on the corner in Rostock, he cannot assert a warranty claim against BMW or will have a very hard time doing so.

The contact person here, in my opinion, is therefore the parquet installer. Of course, you can also inquire with the manufacturer and hope for goodwill. But it can also happen that the parquet installer then completely refuses to cooperate since his expert has certified flawless work. No one likes to be challenged like that, I know from my own experience...
And please always keep that in mind. The craftsman is also a human, not a robot.

The easiest thing will be, as always, simply to do the intensive care according to the manufacturer's recommendations yourself. The parquet layer will not do more than that...

If you tell me you did flawless work and it doesn’t look like in the brochure, I assume a material defect and I have my claim against the manufacturer; the executing company acts here as an "intermediary" and not a decision-maker, or do you take over the manufacturer's warranty for the products you purchase and bear the costs completely yourself?

The publisher is already pissed off, he thinks everything is great... it’s just spotty if you don’t pass by drunk on the bike from 10 meters away.