Softwash Roof Cleaning In Arroyo Grande, CA

The black streaks commonly seen on asphalt shingle roofs are caused by a type of algae called Gloeocapsa magma. This algae thrives in warm, humid environments and feeds on the limestone filler in asphalt shingles. As the algae grow, they form dark streaks that not only diminish the roof’s aesthetic appeal but can also retain moisture, potentially shortening the lifespan of the shingles. These streaks are more prevalent in shaded areas where sunlight cannot effectively dry out the roof.

Over time, the algae can spread across the roof, worsening the discoloration and leading to uneven staining. While the streaks themselves are not immediately harmful to the roof’s structure, their presence can lead to increased moisture retention, encouraging the growth of moss or mold. Regular cleaning with specialized roof-cleaning solutions or the installation of zinc or copper strips can help prevent or mitigate these streaks, keeping the roof looking clean and preserving its durability. If you live in Arroyo Grande, CA and have black streaks like this on your roof, please give us a call where we can provide quality roof cleaning with great prices.

Location: Arroyo Grande, CA