Nystrom Security roof hatches provide safe, easy, and convenient personnel roof access for correctional facilities. Nystrom Security roof hatches are available in four different sizes, and are made with 11- or 14-gauge aluminum. Nystrom offers a variety of curb and flange styles to accommodate different roof types and preferred mounting methods, and users can choose from mortise or detention lock styles. Units feature a curb mounting style, with single wall, double wall, curb mount or double curb options. Interior/exterior access, view port windows and security glazing are optional. Pitch-corrected curbs and custom finishes, colors and curb heights are also available.