Interior, 2nd floor ceiling is knotty pine boards/slats. 2 individual slat pieces in two different areas show visible black spots that look like mold. Insulation is above these areas, then a metal roof that is about 8 – 9 yrs old. Are these leaks? What else could be happening and what can I do to clean them? Thank you!

waterloop Changed status to publish April 8, 2024