Installing your new window shutters Installation overview. Historically, interior shutters attached directly to the window jamb or casing and f olded neatly into deep -set pockets next to the window. That's not an option with retro -f itted shutters, which remain in plain sight open or shut. For the best-looking installation, you'll want your shutters to rest parallel to the wall when open, not askew like a half -opened door. That means the f olding point of the hinges needs to protrude beyond the casing. The best way to accomplish this is by attaching the shutters to a f rame. The f rame that holds the shutters can be two simple hanging strips inside the window opening. Or, f or windows that are out of square, a three- or f our-sided f rame around the outside of the casing will work better. The trickiest part of the process is f iguring out how to position the hanging strips on the jamb. To align them, you must f asten the hinges to the shutters, then hold the shutters at the windows in an open position the hanging strips to the jamb. To align them, you must f asten the hinges to the shutters, then hold the shutters at the windows in an open position parallel to the wall and mark the wall where the hinges f all on the jamb. That provides a guideline f or the hanging strips. Once they're in the right place, setting the shutters in the window opening and mounting them on the strips is quick and simple.