The Reflex Dome is the glazing-only option. It was specifically developed with wide 80mm and 100mm flanged polycarbonate glazing units for the refurbishment sector. This fits mechanically over existing kerbs or upstands of varying dimensions. Opening and ventilation options in the Access Building Products range include manual and powered hinges and automatic openers to help with smoke clearance. The latter open up to 90° to give maximum possible ventilation in the event of a fire. In addition to the standard domes, Access domes are also available in a pyramid profile that is safer in areas where there is a risk of people walking on the roof-light.