Things You'll Need:
- 8d Finishing Nails
- Hammer
- Level
- 3" Casing Screws
- Drill with Screwdriver Bit
- Shims
- Pin Nailer
- Air Compressor
- 1-1/4" Pin Nails
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Step 1
Set the base of the prehung door into the base of the rough opening. Tip the top into place.
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Step 2
Push the hinge side of the door tight against the wall framing. Install an 8d finishing nail into the top of the hinge side of the door frame.
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Step 3
Use a level to check plumb along the hinge side. If the door is not plumb, install shims to move the base of the door away from the framing until the level shows plumb. Install an 8d finishing nail through the door frame and shims into the framing.
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Step 4
Inspect the gap between the door and door frame, called the reveal. There should be a uniform gap along all sides. If the gap is not uniform, use a little pressure to adjust the frame with your hands.
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Step 5
Drive 8d finishing nails through the latch side of the frame to secure the door. Ensure a uniform reveal during this process.
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Step 6
Install shims on either side of the hinges and latch area. Drive 8d finishing nails through the frame and shims into the wall framing at each location.
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Step 7
Remove the center screw from the top hinge on the frame of the prehung door. Install a new 3" screw into this location. This will prevent the door from sagging.
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Step 8
Install the casing around the door. Use a pin nailer with 1-1/4" pins to secure the casing to the wall.
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Step 9
Test the door for proper functionality.
