I started my classes this past weekend. I didn’t think I would ever like school, but I am really enjoying the classes. Anyway, for homework I had to inspect a roof, so I did my neighbors.
I see black streaks on the roof. I think it is algae/mold? I did a search on google but the answers seem unreliable since many who have an answer are selling a product or service to clean your roof. So, I am turning to the professionals. Is it detrimental to the roof? How would you report or advise your client?