Please note this is a manually operated acess hatch and emergency escape flat roof window base only (kerb or upstand). The VELUX flat roof access window CXP can be opened manually to an angle of 60 to allow easy roof access. The roof access window can easily be combined with a group of VELUX flat roof windows, CFP/CVP, without changing the outer appearance of the building. Manually operated flat roof window base for access or escape with double glazed insulating glass unit featuring laminated inner pane for safety. Compatible with clear or opaque polycarbonate dome top covers only. Please note this product is not compatible with VELUX flat roof blinds FMG, FMK and MSG. Excellent rain noise reduction All VELUX flat roof windows provide excellent rain noise reduction. The special structure of the dome deflects the noise, while the combination of an exterior dome, double-glazed low-energy pane and insulated kerb reduces noise considerably. Together, they provide protection from rain and hail noise as well as aircraft and traffic noise, and other disturbances. Properties Manually operated flat roof exit solution. Double glazed window with polycarbonate cover. Opening angle of approximately 60. Also avaliable in the following sizes: 900mm x 1200mm and 1200mm x 1200mm. Also avaliable with an opaque polycarbonate cover. Excellent insulating value and sound reduction. Dimensions External frame size including kerb - 118cm x 118cm. Structural opening size - 100cm x 100cm.