Looking at the roof rack I would say that I would not want to put an extension ladder longer that 12' total length(6' collapsed) directly on there, Maybe even a 14 for short distances and slow speeds. Longer ladders may be too heavy and too long for sure. Looks like the spread between the bars is about 3 feet, so a 12" total length ladder would extend 1.5 foot over the ends of the rack. I can live with that. I know there is a Kayak carrier and kayaks are longer than 6' so maybe you can strap a ladder on to that carrier and transport it more securely...maybe. BTW I carried a 8' Werner class 1A step ladder in my 2010 insight with the hatch closed.