Door Threshold / September 16, 2018 / Marphisa Duffet
With the rough opening clean and prepped for the new door and jamb move the system into place as one with door hung on hinges. Temporarily shim the side jambs tight top and bottom ends in the rough opening. Temporary shims at the bottom hinge may also be required to straighten door sag. The top hinge will sag just be aware that you will compensate for it later with shims and a screw to snug it when the door is installed permanently. Use of a level isnt necessary just align the jambs flush with the interior plaster and shift shims to square the door in the jambs with even spacing reveal.
I would like to recommend something here for anyone who is thinking about installing a door that will have a high door threshold. Dont do it unless you have another reason that is protecting the area from water snow or something else that would create a bigger problem if you lower the door threshold. Heres what happens to most people. You walk through your home regularly travel about and even go to work without running into these high door thresholds. You come home and subconsciously youre not even thinking about the raised curb and you trip. One trip to the ground could cost you more in medical bills than it would have been to remove and lower the raised door threshold.
New jambs allow for air-tight vinyl weather stripping and adjustable thresholds with vinyl door bottom sweeps. Low maintenance fiberglass or metal doors are sandwiched with foam insulation. And doors with windows come with thermal glass. Installing a new door in an existing older home has become a highly desired remodeling upgrade. These days installing a pre-hung entry door system (including jambs) to new wood stick frame construction is generally pretty straight forward; you can just nail or preferably screw through the jambs to the framing studs behind. If adjustments are necessary just pull the nail or back out the screw re-align the jamb using builders shims and try again.