I've heard contractors say to install doors first then flooring, and others suggest the opposite. I'm installing new 3/4" prefinished flooring and new doors/closets (prehung wood/ primed white). What are the advantages/disadvantages to installing the doors after the floors? What sequence would result in the best finish? Thanks
I like to put the flooring in first. If you're working on the last row against a wall with a door in it, and you have to cut a piece that's half strip against the wall for half its length, and a full strip in the doorway, it's easier to get it into place if the jamb isn't in the way. It also means you can get the fit better at the bottom of the door jambs, without needing to use a flush-cut saw to trim the jamb before you can fit a floorboard under it, or ending up with a gap between the jamb and the floorboards.
As far as cons, I guess putting the doors in first means less activity in the room once the floors are in place, and thus less risk for dropping a hammer and marring the floor, or tracking dirt across the finished surface.
Theres one good reason to install the doors first and that is if your floor is not level across the threshold (almost always off by some factor in my house). Before the floors go in you can easily shim one end of the jamb to get the door exactly plumb. After floors this would be a huge pain to do since you would need to pull the door out and saw the jamb. Also, maybe others are more careful but I found it's hard not to ding the floor a little bit when doing doors afterwards. I also like a very tiny gap between the floor and jamb to slide paper under when painting which saves a ton of time. The person who installed my floors used a proper tool (not a trim saw) and cut the jambs very precise