Ugly black stains on roof shingles are frequently mistaken for fungus, mildew, dirt or oil, but are in fact caused by a resilient type of algae. This common problem has Increased during the past 20 years and it is showing
Ugly black stains on roof shingles are frequently mistaken for fungus, mildew, dirt or oil, but are in fact caused by a resilient type of algae. This common problem has Increased during the past 20 years and it is showing