Keylite's fire escape roof windows are ideal for safety as they open to 45° complying with statutory regulations offering an easy means of escape in the event of an emergency. Part F building requirements for background ventilation are supported through Keylite’s cleverly designed top handle allowing for controlled trickled ventilation when the window is fully closed and securely locked. Our pre-fitted flick-fit brackets and spring loaded sash hinge finger springs enable a quick and smooth installation in under two minutes. Keylite has taken responsibility for thermally insulating around all of our roof windows with our unique integrated expanding thermal collar included as standard on every roof window we manufacture. The entire Keylite PVC range comes with a 20 year manufacturer's guarantee when serviced by a Keylite engineer in it's 9th year.