Set the stool in place, and make necessary adjustments to get the window sill tight to the window and flanking walls. attach the stool to the windowsill using 6d or 8d finishing nails. install the side window trim; nail window trim casings to the window’s side jambs using 6d finishing nails.. Trimming out a kitchen window with a deep sill is something that you have to do in a very particular way for the best possible results. how to install interior window trim building and. Sills are part of the window trim, which also includes the head casing, side jambs and the apron, the piece attached to the wall beneath the sill. each plays a part in keeping the window structurally sound and the elements out..
Tom silva's step-by-step instructions for one of his favorite jobs—installing window casings. place the stool face down on the sill with its back edge against the sill trim. mark where the top of the trim meets the stool's end. step eight // how to trim out a window. cut and install the apron.. A window sill is the bottom portion of the window, and usually- but not always- has a lip that overhangs the trim molding and over time these can get damaged or even rot. repairing window sills isn’t a hard diy and i try to share simple ways to make diy improvements to your home.. Remove window stool: if the existing window stool doesn’t extend past the drywall on each side by the width of the new wood casing plus 1/2”, remove it and the apron molding under it by cutting through the caulking with a utility knife, then using a pry bar and hammer to take it out..
