Black Mold On Roof Shingles

Here s why algae grows on roofs.

Black mold on roof shingles.

Roof shingles become dirty over time. You can successfully clean shingles by using oxygen bleach. Mold stains can form on roof shingles that are in permanent shade. I covered our asphalt shingle roof about five years ago with white 50 year guaranteed shingles that had algae prevention treatment but now the entire north side of our roof is black with algae i bought the shingles from lowe s in marianna florida.

The most common type is known as gloeocapsa magma also known as blue green algae. Black mold stains streaks and clumps of moss growing on the roof look unsightly. Stained shingles take away from the overall neat appearance of the exterior of the home. The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma.

In hot and humid climates like tampa algae growth on asphalt shingles can be a real problem. The black streaks are also known as black algae or roof mold. They are exposed to wind rain and other weather elements that not only cause dirt to form on the shingles but also mold and mildew. You clean it and it returns year after year.

The black roof stains are caused by a form of algae that has been around for years typically found in the woods on. Black mold on asphalt shingles is ugly. These stains will discolor your roof and damage the shingles over a period of time if left alone. Granted some of it could be mold but what is spreading like wildfire is gleocapsa magma.

Extensive mold growth can also expose the interior of your attic or crawlspace to mold spores carrying the problem over to the inside not to worry though because you can clean the mold off with basic household bleach and save. 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. Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad. What are those ugly black streaks on my roof.

You may also worry that mold growth will harm your asphalt shingles and reduce the roof s lifespan. In reality what you are seeing is not black mold but a bacteria that is called gloeocapsa magma. No one likes having to buy a new roof much sooner than anticipated. I am really disappointed the treated shingles didn t work.