QI live in Florida. One problem here is mildew forming on asphalt shingles. Local companies that clean roofs claim that this mildew should be cleaned off because it can damage and shorten the life of ...

QDEAR TIM: My roof needs cleaning. It's a newer asphalt shingle roof, but parts of it are covered with moss, lichens and algae. Is a pressure washer a good tool for cleaning roof shingles? Will it ...

Q - Our roof has dark streaks in various places even though there are no trees directly around our home; our neighbor says it needs to be cleaned. How would we clean the roof? The guy with his ...