Some people have had success with a bleach and TSP solution. The algae will typically form on the north side of the house. Most (all) shingles installed in the Southeast US have copper laced granules. The copper will prevent algae growth. It appears from my previous home that the copper wears away after about 10 years and then you may see some algae growth. I assume your roof is at least 10 years old? You can contact a roofer and have a copper strip installed near the ridge line. When it rains, the trace amounts of copper will prevent algae growth.
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Originally Posted by dblwyr
Wondering if anyone has had algae growth on their roof shingles and what, if anything, they did about it?
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