How To Replace An Exterior Door Jamb. Be precise as it will be important to have a snug fit in this space. Remove any screws or nails from the damaged area of the doorjamb.
2 nail scrap pieces of 1 by 4 lumber around three sides of. To install a door jamb start by measuring the door frame and cutting the wood to size. Center the door and frame in the rough opening as a test fit.
Be precise as it will be important to have a snug fit in this space.
Then use a nail gun to secure the 2 pieces together before attaching the other side of the jamb in the same way. Remove the interior trim leg just like the brick molding was removed. Then swing the door open and lift it off. Measure your old door.