Hey guys have a quick question. I inspected a metal roof today that appeared to have a black substance dripping down. Have any of you seen this issue before? It was dried out, and appeared to have happened a while ago. Is this the underlaymen
t getting too hot? What might this be due to? Insulation or ventilation issues? There is no attic space, as it is a log home with log rafters and T&G.
Thanks and let me know.