Guide for Algae & Moss Removal on Your Roof

Roof with streaks of mold on it.

If you live in the South, Midwest, or another region with warm, humid summers, you may notice stains and streaks showing up on your asphalt shingles. These stains look a lot like mold—but in fact, much of this is actually blue-green algae (Gloeocapsa magma). And in some cases, what looks like mold might be moss, […]