Using a GriGri for roof work can be dangerous! Back up your GriGri with a Prusik/Klemmheist!

I am in no way a pro, but I am prepared to risk life and limb maintaining our own roof. Along the way I have learnt a few things the hard way. Here's a tip on how to secure your GriGri with a Prusik (a Klemmheist hitch works just as well) which is giving me a LOT more confidence.