I can walk on the metal building roof but I stay away from the edge about 3 to four feet. My biggest fear is slipping. I have gotten down on my knees to tighten a screw and have my keens start sliding. I really don't have to much problem with shoes sliding but worry about it. Can you tell what your experience is and what you did to remedy that worry or making it safer. It is a little worrisome when I am up there. I also found some caulking called novaflex that comes in white that is suppose to be very good to seal and work with by using your finger to smooth it out and get a good finish that seals any leak. thanks