Reviews and recommendations are unbiased and products are independently selected. Postmedia may earn an affiliate commission from purchases made through links on this page. A: Yes, thin strips of ...

Zinc Strips on Mossy Roof, Four Years Later Starting in 2010 I began conducting fairly long-term experiment by installing zinc strips on a moss-covered garage roof, and showed before and after photos ...

Q: On many roofs with asphalt shingles I notice black streaks. New light-colored orange-red asphalt shingles were installed on our roof about six years ago, and now I notice the dark streaks forming.

Another thing you can do is trim back any tree branches or bushes that restrict air flow on the north side of your house. Air ...

Q: I have noticed an increasing growth of moss on the north side of my roof. Is this stuff harmful? How can I get rid of it without doing environmental damage? A: Moss, mold and mildew on roofs is a ...

Q. I have a white asphalt roof about eight years old. It has developed long vertical streaks on the north side. It looks like some kind of mold. I blamed the large, old black cherry tree on that side.