With the interior jambs and stoop in place, install the casing. If using rosettes, install those first. We placed our 2 1/2-inch rosettes plumb with the interior side of the side jamb, at the end of the head jamb and about 1/4 inch from the top of both. Ensure that the rosette is plumb and square before securing it with 2-inch finishing nails. Adhesive can also be used to install the rosette.Install the casing. Measure the distance between the stool and the rosette for the sides and between both rosettes for the head. Cut each piece of casing to the specific length for each measurement. Typically, the casing is attached with a small part of the jamb visible. We placed our casing with 1/4 inch of the jamb visible. Make sure that each piece is plumb to the placement you have chosen and attach with 2-inch finishing nails.Use a nail set to countersink all the nails on the trim.

...trim3

Window trim

With the interior jambs and stoop in place, install the casing. If using rosettes, install those first. We placed our 2 1/2-inch rosettes plumb with the interior side of the side jamb, at the end of the head jamb and about 1/4 inch from the top of both. Ensure that the rosette is plumb and square before securing it with 2-inch finishing nails. Adhesive can also be used to install the rosette. Install the casing. Measure the distance between the stool and the rosette for the sides and between both rosettes for the head. Cut each piece of casing to the specific length for each measurement. Typically, the casing is attached with a small part of the jamb visible. We placed our casing with 1/4 inch of the jamb visible. Make sure that each piece is plumb to the placement you have chosen and attach with 2-inch finishing nails. Use a nail set to countersink all the nails on the trim.