algae-resistant shingles

Understanding Algae Growth on Asphalt Shingles Algae growth on roofs, particularly on asphalt shingles, is a common issue that results in unsightly brown to black streaks. Often mistaken for soot, dirt, or tree droppings, this discoloration is caused primarily by the species Cyanobacteria Gloeocapsa Magma. This airborne algae tends to collect and proliferate on rooftops,…