Before-and-after roof cleaning in Pasadena, MD. The top shows a dirty roof covered in moss and debris, while the bottom shows a clean, dark gray shingle roof with no visible growth.

Black Streaks on Your Roof? What They Are and How We Clean Them Safely

I get some version of this call all the time: “My roof has these black stripes running down it. Do I need a new roof?” Usually the answer is no. What you’re looking at is almost always algae, and it can be cleaned off safely if it’s done the right way. I’m Frank, and I

Black Streaks on Your Roof? What They Are and How We Clean Them Safely Read More »