Part of my roof gets very little direct sun. Both moss and green and black algae grow on the shingles. Are these organisms damaging my roof? What is the best way to remove them? Is there a permanent ...

Most manufacturers will void the warranty on their shingles if they discover you used a pressure washer on your roof. They're afraid that if an untrained person gets the cleaning wand too close to the ...

Q. Many roofs in my neighborhood, mine included, are covered with black streaks. What's causing this to happen, and can the roofs be cleaned? I'm able to walk on my asphalt shingle roof with ease, but ...

Many roofs in my neighborhood, mine included, are covered with black streaks. What’s causing this to happen, and can the roofs be cleaned? I’m able to walk on my asphalt shingle roof with ease but am ...

My roof has skid marks. And lichens. Next thing you know, it could grow a mossy beard. What's going on here? And more important, what can I do about it? You might be wondering the same thing, if your ...

Question: The roof on my split-level house is "stained," says e-mailer "Bob from the Suburbs." Is it mold? My roof looks discolored and it looks like I'm ready for a new one. In my development, roofs ...

Q. I getmold or moss on my roof shingles. Is there a way it can be removed without harming the shingles? Jean Holden, Fontana, WI A. Mold, mildew and algae grow on roof shingles where there’s moisture ...

LACKAWANNA, N.Y., June 26, 2025 (GLOBE NEWSWIRE) -- What are those dark streaks appearing on your roof—and why shouldn't you ignore them? Alex Richards of Weather Resistors of WNY provides critical ...

Q: I have a 6-year-old asphalt shingle roof with a patch of moss on the north side. Is there a safe and effective way to remove it? A: It’s unlikely to be moss. That usually takes longer than six ...

DEAR TIM: Many roofs in my neighborhood, mine included, are covered with black streaks. What’s causing this to happen, and can the roofs be cleaned? I’m able to walk on my asphalt shingle roof with ...