We use an anchor point to run the lifeline through, much like the branch on a tree for tree climbers. The rope connects to the harness on one side and to a prussic line on the other side. This allows the climber to lengthen or shorten the rope as he walks safely around the roof for gutters cleaning. Using the pulley saves a lot of friction and wear on the rope.
Our guys are trained, equipped and insured to work safely at heights.
Watch how we secure our lifeline to a tiled roof on our youtube clip.