I moved my business into a new building, and there is a doorway i want to put up a door in it. However the doorway is about 1/4" narrower at the bottom, than the top. Neither of the top corners are square. I am looking for the easiest way with the least amount of work and knowledge needed to hang this door. It is only a barrier, it is not for security. It will be closed most of the time, so i am not worried if it is going to naturally swing open or closed.
Also, the cuts for the hinges on the door and the frame do not line up. I am fine with buying a new door, but I would rather not replace the frame of i can avoid it.
Any suggestions?
If the door frame is not currently falling out of the opening there's enough meat in the opening to mount a new one. Fondots is right. Re mortising well for the hinges and modifying the door to fit will be more effort than getting a pre-hung.