After the window is trimmed, slide shims behind each nail location to hold out the trim while nailing, then cut off the shims. caulk the perimeter of the window casing trim to eliminate gaps before painting.. A close cousin of the finishing nail, the casing nail is slightly larger and has increased holding power. it is commonly used for attaching moldings such as window and door casings where added. - window casing, interior molding applied around the top and sides of window, and used to form the apron below - carpenter's glue, applied to mitered joints of window casings - rag, used for.
Attach top casing to wall: align the top casing evenly 1/8� above the opening and nail the casing in place, leaving a 1/8� reveal between the casing and drywall opening. cut side casings to length: measure from the window stool to the top of the top casing to find the length of each side casing.. Once the stool is cut to fit, secure it to the sill with finish nails. the side and head casings will be installed just like they were in the wrap-around style. step 4 � create the apron. once the side casings are in place, you can create the apron. measure across the window from the outside of the casings.. Measure and cut your window casing to meet the 1/8? reveal mark on top. secure the window casing with finish nails. measure and cut the backer band to the same height. secure with finish nails. the window should look like this: cut the 1? x 6? board to fit even with the outer edges of the casing and backer band..
