Condensation on door frame

Dear forum members

Since I didn't find anything through the search (it somehow doesn't work for me), I am creating my first post right away.

A bit about myself: I am almost 30 years old and live in the Luzern hinterland in a 3.5-room condominium for rent.

Now to my question:
Due to the utilization factor, the stairwell was designed to be open and the apartments were insulated against the stairwell. The problem now is the door frames: as soon as the temperature difference between outside and inside becomes too great, condensation forms on the solid metal door frames and a small accumulation of water forms on the floor day by day. The door itself is wooden and well sealed; the peephole and the lock themselves also form a bit of condensation, which I don’t really mind.
I assume there are different types of metal door frames, right? I believe that frames intended for heated living spaces were used during construction, but not those meant for open stairwells. The metal conducts the cold completely inside without interruption.

Can someone tell me what alternatives there are or what went wrong?
Unfortunately, I can’t provide more information about the installed parts since I’m not at all a professional. Just one more thing: various other botched jobs were caused by the workers (but also by the architect) during construction, so nothing surprises me anymore.

Thanks for your answers,
Greetings from the Luz. Hinterland
hunki

Hello hunki,

You are correct in suspecting that the wrong construction was chosen for the apartment doors. The door, in your case a front door - should have an insulated frame and not a door frame in the proper sense.
That condensate forms on the frame running from outside to inside is normal from a building physics perspective, but over time it can damage the door.

Describe the problem to your landlord, after all it is his door that is getting damaged; however, he alone cannot change anything, the landlord would have to clarify that with the owners' association.

Hello hertweck

Thank you very much for your response. That is exactly what I suspected and I will get together with the other condominium owners to discuss the issue.

Best regards
hunki