Yes, it is perfectly safe to walk on a metal roof. However, in the case where the pitch of the roof is very steep, we do not recommend doing it unless you are a professional with safety equipment. Regardless, before you do decide to walk on your roof, please ask for recommendations from your roofing contractor who can explain a safe way to do it and indicate where you should be stepping in order to eliminate any potential damage to your roof. Furthermore, you would need to make sure that your footwear doesn’t have small sharp stone stuck on the bottom or any sharp edges that might scratch the top coating on the metal surface of the roof.