Black Algae (Gloeocapsa Magma) moss and lichen are eating your roof shingles and causing black stains and streaks.
That same Cyanobacteria Gloeocapsa Magma found on roofs will grow on wood, concrete, vinyl siding, aluminum, and other surfaces as well. The good news is that through soft washing, these stains/microorganisms can be safely removed! In regards to other possible culprits inhabiting a roof, many nitrogen fixing blue-green algae will grow in areas with little to no nutrients. They are able to sustain themselves because nitrogen fixing organisms have the ability to create nutrients solely through the nodules on their filament root systems. That is why here at SoftWash Systems, we believe that treatment of a roof or surface is more beneficial to rid the source of the staining rather than just blasting away at the surface!