Don�t forget your apron � window casing, sills, and more! case, you want your interior sill level, so you just use shims (small pieces of wood) to fill in the low side of the angle and nail through them. that is usually all that�s needed to level up an interior wood sill. here is a link to a post i did all about window casing. Mitered returns for window aprons (post #170033) mike_czapla on tue, 01/25/2000 - 21:43 . in . to make the return pieces, just cut a small piece of scrap trim with a 45
