What are those black streaks on your roof???? Algae commonly cause streaking and staining on roofs. The dark color that appears as a black stain is caused by a specific type of algae called gloeocapsa magma. This growth is a type of bacteria that forms when algae spores group together. To learn more click the link: myclearviewteam.com/roof-cleaning Let us save your roof! Call us today for a fast and free quote! 440-479-9789 #roofcleaning #lakecountyohio #northeastohio #supportlocalbuisness #roofwashing #CuyahogaCounty #tporoof #tporoofs