Temporarily insert the vertical doorjamb planks into the door frame and have a helper hold them in place.
Making an exterior door jamb.
Place the doorjamb into the door frame.
Use more shims if two are not enough.
Wedge thin wooden shims between the frame and the jamb so everything will be level.
Measure across the top of the door frame to the inside edges of the 2 doorjamb planks.
You now have a frame.
Screw the hinges onto the correct side of the jamb.
Measure the top of the door jamb.
Flip the hinges over and insert them into the cutouts.
Use shims to adjust the head and latch jambs so the reveal is consistent along the top and side edges of the door then nail the head and latch jambs in place.
Hang the door in the jamb.
Make sure that the shims are tight.
Trutrim 37 5939 in x 6 8359 ft pine primed finger joint exterior door jamb kit.
Drive all nails slightly below the surface of the jambs with a hammer and nail set.
This is where you ll hang the door.
Place the door in the jamb and fasten it to the hinges.
Using a mortising template route matching mortises for the hinges on the door and jamb.
Insert the shims at the top on both ends and along the sides at the top middle and bottom.
Nail this header top piece to the studs that you put on the side.
Make sure it s tight and opening in the right direction.
Insert shims between the doorjamb and the door frame.
Cut or break off any protruding wedges that extend beyond the door jamb.
It s much easier to do now before the hinges are screwed in and the whole thing is attached to the door.
Fasten the 3 sides of the exterior door jamb.
After your three door frame pieces are cut to the correct size prime and paint them.
Nail one door jamb to the wood frame you built on the hinge side.
Cut one stud to the width of the door and place it on top of the door opening.
Unless you are installing a prehung door you ll need to trace the outline of the hinges on the jamb and cut an indentation using a router or utility knife.
Overlap the shims by sliding one in from the outside and one in from the inside.
The door should be 90 degrees to the jamb.