When installing a wooden floor in any type of room there will be doors. At least one. Or seven in one hallway.
Doors are not a problem - tick layers of paint on the hinges, now that's a problem. In our (Dutch) eyes the door frames are most times a small problem - no existing high enough wooden thresholds to bud the new floor against (leaving the needed expansion gap of course!) and a whole layer of wooden (or MDF) strips in various designs as architraves.
But nothing proper tools can't handle to cut underneath or cut to the right new height required so the floor or flat beading slides underneath the door posts and a new solid threshold separates the room from others without the door scraping over it - or causing draft.
All part of the daily job of a floor fitter. Well, wooden floor fitter that is.
We stopped counting the times our clients ask us kindly to cut doors in completely different rooms or areas after a carpet fitter or tiler has finished his/her job without 'closing the door'.
Apparently that's only a wooden floor fitter's common courtesy, getting the doors back in and having them work properly without damaging the new thresholds, floor or causing draft.