Fits a roof pitch of 15&8211;90 degrees, Rain sensor closes the window automatically when it rains, Fully programmable remote control uses secure-radio-frequency technology, VELUX roof windows are best weatherproofed using VELUX window flashings, Ventilation flap can be operated with the window closed, Requires less maintenence than natural pine finish, High quality moulded polyurethane with white lacquer finish & timber core, Forest friendly timber frame, High quality timber core with mouled polyurethane finish