Your Roof – It’s What’s for Dinner – 10 Steps to Algae, Moss, Lichen and Mold Growth on Asphalt Shingle Roofs! What every Homeowner Needs to Know!
The process of roof debris accumulation is a gradual one but a damaging one, nonetheless.
1. First, the roofing shingle manufacturer placed crushed limestone in the shingles used a filler, binder to the fiberglass and asphalt shingle matting which made the modern shingle, a natural snack food “pit stop” for the blue -green cyanobacteria GLOEOCAPSA MAGMA algae.
2. Then, Two, the algae was allowed by the homeowner to start growing and then remain on the roof until it was in “full bloom” and covering most of the Northern facing, roofs exposed areas, then later, as the roof continued not to be maintained and properly cleaned, the algae continued its growth as their was never any treatment or biocide or fungicide agent applied (ever) to stop its rapid growth, and soon it covered the entire roof surface.
3. Once the bed was made, i.e. the algae had propagated, sheathed itself by developing its dark colored husk and turning black to protect itself from the sun’s rays, it continued to grow and grow, until it built a thick bed of algae, holding in the accumulation of the overnight moisture, roof condensation and dew, which allowed the next phase to occur.
4. This next phase is when their is all the right ingredients for additional growth of OTHER organisms BESIDES the GM algae, such as , LICHEN, MOSS, etc.
5. Once the bed has been made by the HOMEOWNER, neglecting to safely use non pressure roof cleaning methods, like the methods and teaching, here on the ARCA and RCIA, the algae was given all the opportunity it needed to “INVITE” additional “roof dwelling friends” to the party up on the homeowners rooftop.






