As slate is a delicate material, it is generally advised not to walk on slate roofs unless it is absolutely necessary. When conducting repairs, home service pros usually use scaffolding or hook ladders to reach the tiles instead of walking directly on the roof.
Key was a pleasure to do business with. He acted promptly, arranged to be here on the first non-raining day as our roof was leaking. The crew was fast and exceptionally neat, I didn't have to do any cleaning afterward....
Key's team showed up on time, were polite and professional, did a great job, and cleaned up afterwards. I would definitely recommend this company and would hire them again.