The property owner has the responsibility of performing inspections and taking measures so that functions and devices on the roof are maintained. If the roof or roof safety devices have serious defects, they must not be walked on/used; rather, more secure methods must be used.
When inspecting a roof and roof safety, for example, within a roof shovelling contract, the inspection protocol may be submitted and a sign posted at the access point. If this inspection is complete then other professional groups may be present on the roof during the period established.
Even the inspection work shall be performed on a roof in a safe manner by people with the appropriate training and equipment. Always check the equipment before using it. Ensure, for example, the strength of the anchoring devices before anchoring personal fall protection equipment.
You can find more information about maintenance and inspection under Risk analysis - survey and assessment