Black Streaks On Slate Roof

Roof experts say black streaks are caused by an algae known as gloeocapsa magma.

Black streaks on slate roof.

Here s why algae grows on roofs. The black roof stains are caused by a form of algae that has been around for. The photo above shows a slate roof during a cleaning. Airborne spores deposit it on your roof where it soaks up plenty of sunlight for photosynthesis and munches on the limestone filler in your shingles.

Over time this algae accumulates developing a black outer coating which causes stains on roof shingles. The slates are 9 years old and had a build up of moss algae compounded by tree sap. The black streaks are also known as black algae or roof mold. Black streaks on shingled roofs are a common though mysterious sight.

The streaks are caused by a type of algae known as gloeocapsa magma. While the streaks do not cause a great deal of damage they can cause the shingle to age prematurely. I think i would try copper this time cause the zinc flashing i see on other roofs seem to work better. The black streaks running down roofs are actually a hardy algae called gloeocapsa magma.

Detecting any problems that result in black streaks early can save you hundreds or thousands in roof repair costs. While not immediately damaging they can prematurely age shingles. Black streaking on roofs is a common problem. In short those black streaks are called gloeocapsa magma.

Should i add a second roll of copper about 1 2 way down roof to totally prevent this problem as black streaks are starting to develop also. Have questions about those ugly black streaks on your roof. If it s more costly it will be worth it to get rid of problem once and for all. It s actually a form of algae that feeds on the limestone filler used in the creation of asphalt shingles.

Thank you jim mc. We utilize specifically blended cleaning solutions designed to clean your roofing material asphalt slate tile etc will extend the lifespan of your roof by killing. Technically the black streaks on roofs are a form of algae known as gloeocapsa magma. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.

What are the black streaks on my roof. Our customer used a basic solution of simple green dish soap water. Here s what they are and what to do about them. As the blue green algae.

Many home owners are surprised to discover that the once clean asphalt roof shingles have been slowly covered with a form of roof mold or mildew that appears as a light discoloration and spreads down the roof toward the gutters. Sometimes streaks are caused by mold or mildew growth on shingles but most of the time that s not the issue. Black streaks are a common sight on asphalt roofs especially when you live in a humid climate like virginia. Roof algae can be unsightly but it s easy to get rid of and there are several methods you can do to keep those black streaks on your roof from coming back.