A roof window is a type of window installed in a sloped roof, allowing natural light and ventilation into a space. Unlike traditional vertical windows, roof windows are designed to fit seamlessly into the roofline, making them ideal for attics or upper floors. They can be opened for fresh air and often come with features like blinds or shades for light control. These windows are commonly made of glass and can be fixed or operable, depending on the design. Roof windows are often associated with skylights, which are similar but typically installed flat on the roof. Both options enhance the aesthetic appeal and energy efficiency of a building.