I did a roof inspection last night and ran across one rafter that had several dark “patches”. I’ll be the first to admit, although I could design the roof structure, I am very weak in recognizing mold, which is why I do not offer mold inspections. The rafter in question tested at only a 5% moisture content which makes me think it is not mold. Also it was the only rafter in the attic that had these black patches. What are your thoughts?