Algae Growing On Roof Shingles

Black streaks green or white spots round lichens mosses green moss that spreads across your roof.

Algae growing on roof shingles.

Algae is not a plant but an organism spread by spores. Living in a humid area of the country like florida you ve probably seen your asphalt shingle roofs with unsightly dark streaks on them. Often algae that is identified as green when studied microscopically also looks black or quite dark on a roof surface. The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma.

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. If you have noticed black spots or streaks on your roof you ve got algae on your roof. Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad. A blue green algae known as gloeocapsa magma could be the reason you have the algae which is spread by airborne spores.

Algae growth won t cause any structural problems to your roof but it looks ugly and it can damage the shingles over time. Algae will grow flush against the shingles and fixtures on your roof. Algae growth is common on roof surfaces of several materials including asphalt shingles concrete and clay roof tiles and even slate.