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 ...

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 ...

Dear James: My house has a light-colored roof and it needs to be replaced. It has always had a problem with dark stains on it. What is causing the stains and how do I avoid them on the new roof? -- ...

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: Many of the homes in our subdivision are 12 to 15 years old. In the last couple of years, I have noticed that many roofs, including our own, have dark stains flowing down one side or another. The ...

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 ...