While most builder-grade doors include jambs, this isn’t always the case for custom doors.
This is what will be used in this project.
This can be done quicklywith a routerfitted with a roundover bit.
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Door Jamb vs.
The door jamb and door aremounted inside the door frame, which is part of the building’s frame.
Find Door Jamb Measurements
Measure the height and width of the door and record the measurements.
To find the width of the jamb, add 1/4 inch to the width of the door.
For the height, add 5/8-inch, or slightly more if using a thicker flooring material like carpet.
Cut the Side Jambs to Length
Cut the side jambs to length using amiter saw.
This is especially helpful when working with side jambs that are different lengths.
Mock Up the Side Jambs
Place the side jambs on each side of the door.
Clamp the jambs in place.
Mark the Hinge Height Location
Mark the location of each hinge on the jamb with a pencil.
Mortise the Jamb
Carefully mortise the jamb inside the marked hinge locations using a router.
There are several hinge mortising jigs available that may be helpful.
However, these aren’t always applicable for custom jobs.
Mount the Door
Screw the hinges into the jamb, then slide the door side in place.
Hammer the pin into the hinges to tie the two sides together.
Once adjusted, mount the jamb within the frame.
Cut the top stop to match the inside width of the door jamb.
Repeat the cutting and mounting process on the side jambs.
