Rough Openings

prehung exterior doors door height + 2" door width + 2" transom add height of transom + i-sidelight add width of sidelight + 2 sidelights add width of sidelight + 5 prehung interior doors door width + 2" door height + 2 1/2" double hung interior doors door width + 3" fullbound doors door widith + 2" bi-pass doors