 Millions of Years ago:
Cyano bacteria has existed on earth for millions of years.
It is a simple micro organism that grows in colonies.
Bacteria spores are carried by wind, birds, squirrels, etc.
These colonies of algae need three things to grow: Heat, moisture, and nutrients.
Typically, they are seen on fences, and close to the ground bricks where nutrients can be found.
1890 - 1948
Asphalt was soaked onto a mat made from felts containing cotton or wool fibers.
1949 - 1978
Cellulose fibers derived from recycled paper or wood chips were used to make the asphalt shingle mat.
1978 - today
An Inorganic fiberglass mat is coated with asphalt that is then covered with a protective layer of U.V. resistant, colored ceramic granules. Limestone is used as a void filler between individual mats and also provides resistance to fire and weather.
Unfortunately, limestone is a favorite food for "cyano bacteria gloeocapsa".
Prior to 1978, cyano bacteria would starve to death when it landed on your roof - now it thrives on your roof.
As the algae grows, it holds moisture allowing the growth to accelerate.
Replacing your roof is the fastest way to elimate the algae, but its also the most expensive!
Roof Cleaning has become a necessity in many parts of the country,
and saves thousands of dollars, and wasted landfill space
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