Residential or commercial building rooms have windows which are coverable or closable opening fixed on the wall of the rooms or on the door, roof or vehicle that allows the passage of fresh air, sunlight, and sound. The recent design of the windows is usually glazed or covered in some other transparent or translucent glass or plastic material, with a sash set in a frame. The combination of sash and frame are also referred to as a window. Many glazed windows may be opened, to
