1. Install 18 x 36 window shutter kit 1 Cuta 18 3 8 x 35 3 4 opening in siding between the wall studs where you want the window to be located Caulk along the top edge of the window Secure window with screws provided Window Frame 2 Install wood shutters with 1 1 4 wood screws from the main building kit Screw through the backside of the siding into the shutters For vinyl shutters install shutters with fasteners provided