How I Install A Prehung Interior Door

Here’s how I install a pre-hung interior door.

First, I measure the height of all three hinges.

Then I mark their locations on the hinge side of the rough opening.

I’m using 2 ½” long 15-gauge trim nails.

I put two shims at each mark.

These shims are wedged shaped, so as I slide them closer together they get thicker and further apart they get thinner.

With a 6-foot level I make sure the shims are perfectly in line with one another working from the bottom to the top, this gives me a plumb surface to mount the door to.

I also check that the floor is level in the opening- if it’s off I may need to raise one side of the jamb or the other to make the top of the door level.

Next, I center the hinge side of the jamb with the wall, and I nail it at the top shims. ‪@hausplans‬

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