Blue Green Algae On Roof Shingles

Typically it will appear as dark black stains or streaks.

Blue green algae on roof shingles.

Products with stainguard plus algae protection are covered by a 25 year limited warranty against blue green algae discoloration. In addition to moisture from rainwater blue green algae also eats the limestone filler that s used to make the asphalt shingle granules. Stainguard plus algae protection is available only on shingles sold in packages bearing the stainguard plus logo. If a new roof is in order then suggest gaf shingles with stainguard protection to help ensure the beauty of a roof against unsightly blue green algae.

However algae is commonly found on roofs across the usa and canada. A roof may develop different types of algae lichens and fungi as bacteria take over. Algae can cause unsightly stains and growths on your new roof. If you ve noticed it on your roof you may have mistaken this common algae for mold or mildew.

Living in a humid area of the country like florida you ve probably seen your asphalt shingle roofs with unsightly dark streaks on them. The most common culprit is actually a blue green algae known as gloeocapsa magma that is spread by airborne spores. Many homeowners mistake algae for roof mold in most cases however it is really a blue green type of algae and when it dies it leaves dark streaks on your roof. While it doesn t cause substantial damage to the roofing surface the black streaks can certainly make it ugly.

If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma. As primordial photosynthesizers they were the originators. See gaf shingle accessory limited warranty for complete coverage and restrictions.

A blue green algae known as gloeocapsa magma could be the reason you have the algae which is spread by airborne spores sometimes it can also be caused by an accumulation of mildew mold dirt or defective shingles. According to algae expert michael guiry algae base at references some of these black algae are as identified in the lab blue green or even lichenized algae while others are a diverse group of coccoid algae like our microscope photo of more green algae from a roof sample below that are turning out be be very diverse. Though often attributed to an accumulation of dirt defective shingles mold or mildew. Algae can grow in moist shaded areas so if a homeowner has trees hanging over their roof tell them to trim them back to let the sunshine warm and dry the roof.