Door frame not fitting / no sound insulation

Hello everyone,

the interior doors have been installed in our new house. The measurements were taken before the tiler came. The walls were then tiled halfway up, which meant the door frame no longer fit because it was too narrow. The installer then planed part of the door frame but could not go further due to stability.

We now have a large gap between the door frame and the wall. Acoustically a disaster, you couldn’t install a door with the same effect either. The company refuses a replacement, claiming the fault lies with us. Regardless of who is to blame, I will take care of it myself.

How can I improve the sound insulation? Install a joint filling profile and smooth it over with silicone (see pictures) plus foam it out fully with construction foam or something similar?

Oh, that is very annoying, we have the same issue with a door. However, I have no explanation for how that could have happened. I would stuff it with soundproofing mat and then spray it with acrylic. Afterwards, paint the acrylic. Then you also have a visually successful solution.

Sound-wise a disaster

What kind of room and what kind of soundproofing is it about? When I hear tiled, I think of the bathroom. Who really cares about soundproofing there? Do you feel disturbed on the toilet if someone loudly calls from a floor below? For the bathroom, I would simply use acrylic and that would be it.

Yes, it is the main bathroom, I forgot to mention that. It is not about the sound coming into the bathroom, but rather the sound going out. Currently, for example, the doors of the bedroom and children's room are open at night because of our child. When I am the first to shower in the morning, it can be heard accordingly in the bedroom. Listening to music will also be an issue later.

Interesting, we had the on-site appointment with the door manufacturer yesterday and he pointed out exactly this situation to me! He drew directly on the wall and made notes that tiling should not go all the way to the edge there.

Alternatively: Remove the tiles and shorten. Reattach the door frame to the wall.

In my opinion, the noise reduction from this will be rather minimal.
What about, for example, an (existing?) ventilation slot under the door (e.g. for [Kontrollierte-Wohnraumlüftung]?)