We're sharing this information from The Metal Roof Outlet because everyone with an asphalt roof needs to know this.

"The "black streaks" or "stains" that appear on your roof are living organisms that are feeding off of your asphalt roof!"

WHO: Homes across America 

WHAT: Gloeocapsa magma (a type of blue-green algae)-eats the limestone filler that asphalt shingles are made with Mold / (fungi)- eat the algae 

WHERE: Climates with warm, humid summers like ROCHESTER!! The spores on the northern exposure of the roof stand a better chance of survival because that portion of the roof is the last part to dry after rain or morning dew. This raises the humidity on the surface of the shingle, thus creating a perfect breeding and feeding ground. 

WHEN: The algae spores are carried to our roofs from water sources by the wind and birds, and then from roof to roof where it grows and feeds on the limestone filler in asphalt shingles 

WHY: Shingle manufactures changed from all asphalt to fiberglass shingles. The limestone in the fiberglass shingles which, is added for weight, attracts the bacteria and begins to spread. 

 

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1513 Empire Blvd 
Webster, NY, 14580 
585-703-4982