Can I keep my existing window trim if I install shutters? Yes! There’s a reason to remove or do work on your old window trim when installing new plantation shutters. Natural Ovation wood shutters and patented Polywood shutters can be customized with a variety of frame styles to fit easily into your existing window trim. If your windows are trimless, we offer frame styles to install directly onto the drywall around your window to secure your gorgeous new shutters to your window opening.Your shutter installation crew will measure each of your house’s windows during your complimentary design consultation to make sure that your window trim is perfectly complemented by the frame of your new window treatment.