We recently bought a house and closed off upstairs was a bonus room which is over the family room on the main level below. The bonus room has a sub floor already in it, but it wasn't opened. So I cut the wall open at the end of the hall and put a door in. I now want to finish the room, but my question is, how is the best way to build up a floor.
When you go from the hallway into the unfinished room, there is about a 2" drop to the subfloor. I want to bring that floor up to level with the hallway.