This isn’t a safe way to do this. The yellow hook is the right type of hook but putting two ladders together is a no no according to roofing experts. They say use a one piece ladder and have a backup system. Using a rope with a harness is your best bet in case you start to fall. Roofing jacks can be used as a backup also on shingles. You need a good harness tied to an anchor point for safety. Always have a backup system.
For a roof ladder there really isn’t much stress on the two ladders tied together. Most of the stress is being transferred to the hook and mostly the roof.
Crap design and crap demo. The wheel is too small so you are likely to wreck the roof 'tiles' and the hook is not even positioned centrally on the ladder rungs. So the ladder will tend to tilt to the left! The painter never explained to you how to use it, did he.
One of the flaws with that hook is you can't tighten them because the hook is to big-- this is what I read from other reviews I notice you couldn't tighten it--- am I right?
