Q: I have a northern exposure to the front of my house. It does not get direct sun. … I have black streaks and a slight green color (moss?). I recall you talking about running a strip of copper under ...

As they say, individual results may vary. Zinc strips might not work for every application, but they're not terribly expensive, and they're not difficult for a roofer to install. If you have an ...

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 ...