Roof Ladders Lightweight Aluminium Roof Ladders - Roofing ladders or cat ladders have a built in hook at one end and are designed to be light and easy to use. To use the roof hook, simply push the roof ladder on its wheels along the roof and then over the ridge, then flip the ladder so that the roof hook locks the ladder in place. Our aluminium roof ladders are light so you can lift the ladder with one hand so that the other is still holding on to the access ladder. We sell single section ladders and extending roof ladders also section pieces for sale so you can buy up the roof ladder lengths needed. Our roof ladders all come with a 5 year warranty as standard.