Moss can lift shingles and trap moisture against the roof surface. Algae can contribute to dark streaking and gradual surface wear. Safe cleaning and routine inspections can help protect asphalt shingles. If you notice moss on your roof or black streaks on roof surfaces, it is more than a curb appeal issue. East Tennessee humidity creates conditions where organic growth can spread across asphalt shingles. Over time, moss and roof algae damage can contribute to moisture proble
