In two previous articles, I described techniques for installing a single door and a sidelight-door-sidelight unit. In this video, I use the same techniques to install a pair of doors, because a pre-hung is a pre-hung is a pre-hung.
Regardless of what type of pre-hung unit I’m working with, it’s still a pre-hung unit and I’m not hanging the door. When I hang a door, I scribe it to fit the jamb, I plane it and cut it to the scribe lines, I mortise for the hinges, bore for the lockset, and hang the door on the jamb. In other words, I cut the door to fit the jamb.
But when I’m installing a pre-hung unit, the door is already hung—already cut, hinged, and hanging in the jamb. Which means the door can’t be adjusted to fit the jamb and the jamb must be adjusted to fit the door.
To adjust a jamb so that it fits a door, you have to make critical adjustments in the hinge jamb, especially right near the hinge locations. If you begin the installation by plumbing the hinge jamb, then nailing the jamb near the hinges, you will never be able to make those critical adjustments, especially with a pair of doors.
Follow the simple step-by-step process in this video and with very little effort, you’ll have a pair of doors that fits perfectly…
…both doors will be flush at the top, flush along the meeting stiles—from the top of the doors to the bottom, and all the hinge gaps will be uniform.