Algae Growing On Roof Shingles

Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad.

Algae growing on roof shingles.

Often algae that is identified as green when studied microscopically also looks black or quite dark on a roof surface. Algae is not a plant but an organism spread by spores. Algae growth won t cause any structural problems to your roof but it looks ugly and it can damage the shingles over time. It can be brown gray blue or green.

The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma. Living in a humid area of the country like florida you ve probably seen your asphalt shingle roofs with unsightly dark streaks on them. It appears on the shingles in streaks that head down the roof pitch vertically. Black streaks green or white spots round lichens mosses green moss that spreads across your roof.

Although mold can grow in your roofing materials if water gets trapped somewhere if you see any of the following on top of your roof algae are more likely your problem. A blue green algae known as gloeocapsa magma could be the reason you have the algae which is spread by airborne spores. If you have noticed black spots or streaks on your roof you ve got algae on your roof.