Make sure you jot your measurements down.
How to make an exterior door frame smaller.
Pry off the door casing and the knob side and top jambs with a pry bar if you only need to fur out one side of the frame.
Cut the door header.
It s important to make improvements that fit harmoniously with the size of the home s front windows and porch components however.
To make the door header the top of the door frame cut two 2x4s to the same length as the width of the original opening and nail them securely together.
If you re narrowing the frame by more than an inch remove the hinge side.
If a door is not planned determine the size of the finished opening and add 5 8 of an inch for drywall at each side of the opening.
This is the actual thickness of a 2x4.
You will need to add 1 2 of plywood between the 2x4 s to get the right wall thickness of 3 1 2.
Mark the width of the smaller framed opening on the floor at the.
The larger door space should look as if its design is original to the home s construction.
Measure the doorway where you ll be installing your door.