Lightweight Aluminium Roof Ladders - The roof ladder is a purpose built lightweight ladder with a roof hook at the one end. The roof hook is designed to go over the lip of the roof ridge, which then enables the user to lean on the ladder without it slipping off the roof. If you are unsure or wish to speak to one of our sales team for more advice, call today on 08450 647 647 Summit trade & commercial products have a 5-year warranty