found: An MSI Marketing presentation on : the future of the UK market for roof glazing and rooflights to 2006, 2002:p. i (there are three main types of rooflights. 1. Rooflights can be produced in a number of shapes including domes and pyramids. Such rooflights are typically installed in flat roofs. 2. In-plane rooflights, are used on sloping roofs with an incline of four degrees or more, and are fitted in ths same lane as the roof. Other rooflights are continuous barrel vaulted rooflights which are typically domed shaped and run the length of the roof.)
found: OED online, July 19, 2002(Roof light, also Roof-light, Rooflight: 2. A panel in or on the roof of a building or vehicle made of a material which admits light. Skylight: 2. A small opening in a roof, or in the ceiling of a room, filled in with glass, for admitting daylight; the framework and glass fitted to an opening of this kind)
found: Rooftop architecture, c2005:p. 177 (rooftop construction, building process that enhances buildings)