I am attempting to put a new pre-hung back door in a 100+ yr old house that is not plumb, level, square, or anything else that would make remodeling easy... yesterday we set a new back door into the old rough opening. it fits pretty tightly on one bottom corner because the framing on the sides is like this: \\ / on the outside, the j-channel of the siding follows the same funny-shaped opening, and there is a couple inches of underlayment exposed for the brickmold to sit against. after we levelled and plumbed everything, we noticed that the door was not closed properly (large gap between weatherstripping and door on top of latch side jamb); in order to un-twist we had to kick the bottom corner on the latch side out away from the house by about an inch. over a couple feet (going up) the gap narrows until the brickmold is against the house again.
has anyone encountered this problem, and if so, what did you do about it? should i live with it and try to fill the gap between the brickmold and the house? or should i (groan) trim back the framing around the rest of the opening so i can push the whole unit in? thanks in advance for your advice!