Figure B shows an example of a cap molding for a head casing that we made by stacking two pieces of 3/4-in.
The final step for both the door and the window trim is building and installing the head casing assembly.
Finish the head casing by wrapping the front and sides of the 1x6 with crown molding.
If the miters are tight and everything fits, complete the head casing by nailing the crown molding to the 1x6 (Photo 8).
Hold a piece of crown molding against the 1x6 you'll be using for the head casing and mark it for cutting.
Always start by measuring the head casing and cutting it on your power miter saw.
File the tapers on the back edge and predrill holes as you did for the head casing. Nail this piece in place and set the nails.
Head Casing Taper each miter cut of the head casing with a file.
Head Casing Nail the head casing in place leaving a reveal along the jamb.
Use 6d finish nails to attach the side and head casing to the inside edges of the jamb, leaving a 3/16-in.
The upper part (lintel) of this style is an assembly of smaller pieces of trim applied to the main head casing: The 1/2-in.
First they snap a chalkline where the head casings
will line up.