Interior doors screwing or foaming

Hello,

thank you very much. Then I am a bit wiser again :)

the ideas people come up with :) just take a 2 k frame foam and install it straight :)

After over 2 years, the door should probably already be installed :)

But since the thread is being revived, I also have a question,
we have an SSK 3 soundproof door, can it simply be foamed in or does more need to be considered?