CFP is a fixed (non-opening) flat roof window with a double glazed unit and ISD dome top cover. The window is for installation into flat roofs between 0-15° with a Structural roof-opening measureing 80 x 80 cm. The base unit is made of white PVC while the dome is either acrylic or polycarbonate, therefore, giving a maintenance free finish. CFP flat roof window is as energy efficient as any VELUX roof windows and boasts excellent insulation values. The dome provides significant rain noise reduction and excellent sound insulation, whilst protecting the double glazed unit. It can be supplied as either clear or opaque.