According to legislation accessible roofs that are at least 1m high from the ground surface, must be surrounded by a barrier of at least 1m high, whereas non-accessible roofs with a green roof installation should have a fall protection system installed for the maintenance worker.
DRS systems have prefabricated railings with built-in planting units for cases where the roof has no pre-existing railing.

DIASAFE systems are specialized worker securing systems, integrated into the layered build-up of the green roof infrastructure which protect against falls. They also act as lightning protection, once connected to the earth.