Abstract: Exterior windows on a structure are protected from storm damage by solid panels in pairs mounted in frame members of an attachment apparatus positioned above and below the window and on the exterior of a structure. U-shaped channels are disposed above and below the window and are of sufficient. width to hold the pair of solid panels either closely adjacent vertical edges of the window or in front of the window. The attachment mechanism is adapted so as to securely hold the panels while still permitting that the shutters can be slid sideways until touching each other to protect the window during severe storms such as hurricanes. During normal weather, the shutters can either be left adjacent the outer edges on the window frames, or removed to storage if desired. The shutters are designed to be attractive as well as protective. Methods of securing the panels. in the desired position and attaching the channels are provided.