Describes recommendations on the design, construction and maintenance of windows and doors for safety in use and during cleaning. It includes recommendations on safe working practices to safeguard those who clean them, whether professional cleaners or householders, and recommendations on opening and on the operating heights of window controls to safeguard occupants and passers-by. The type and thickness of vertical glazing to be used in risk areas is recommended in BS 6262. Guidance on cleaning materials and methods is given.