There isn't a lot of information, so I'll make some assumptions. First the black "spots" are on the inside of the roof sheating, the black spots are assumed to be mold and you live in a cold climate? ... read more
I'm no attorney-but this is how I understand things as a layman.
Risk is a broad term and I don't know if you are talking to the safety and health or the finanical well being of employees and buyers. ... read more