Framing Around Inside Windows
Hold a length of casing across the top of the window and mark where it meets the inside edge of each side casing.
Framing around inside windows. The style and material used to make the casing. Measure out the exact cut that you ll need for around the window cut that section out so it almost looks like a big hat and then lay it right down on the windows ledge like so. Over at pretty handy girl cristina from remodelando la casa has a thorough and detailed window casing tutorial to get your from start to finish how to remove a window sill install a new one and trim the window for a full makeover. The casing is the framing that goes around the top and side edges of the window.
With a miter saw make square crosscuts at those marks. There are several parts that make up the inside framing of a window.