How to Install a Prehung Door
Learn how to install a prehung door. Learn what to look for before you start.
Learn what it takes to get the job done right.
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Hanging a door these days is easier than its ever been. In the days before prehung doors, it took more tools and knowledge to hang a door than it does now.
Imagine getting a door slab, an unassembled door jamb, hinges and door hardware and having to do all the mortising, drilling, rabbeting on site.
No longer do you need an array of tools such as a drill, a mortising jig for hinges, strikes, and bolt plate. No jig for drilling the backset for the doorknob and bolt.
Nowadays all you need is a hammer and hard trim nails or a finish nail gun and some shims.
The first thing you need to do is check the opening you'll be hanging the door in for the correct size. It should be 2" bigger than the door size. Even though it's a rough opening it should be reasonably plumb and square.
If the opening was framed by someone else, you may want to break out your level and framing square and check this also. Drywallers sometimes believe the rough opening was meant for them and will let the drywall run into the
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