Why are there dark patches and stains on my roof and what is causing them?

By: Michael on 04/10/2016 - 22:09
The main cause for black streaking and dark patches on roofs is Gloeocapse Magma. This algae can infest a roof and leads to the why the roof looks so dirty. Warm, humid environments are a perfect incubator for this particular strain of algae. South West Florida is one of those "perfect environments". The chlorophyll-containing algae makes the black streaks and stains standout by covering the roof shingles or concrete tiles. 
 
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