What Causes Black Streaks?
Rather than dirt or mold, black streaks on asphalt shingle roofs are caused by the cyanobacteria Gloeocapsa magma, also called roof algae. Each streak is a colony of countless microorganisms that will grow as they feed on the limestone filler in your asphalt shingles.
Algae spores are spread by wind and animals, so it’s almost impossible to give your roof foolproof protection. They prefer dark and moist environments, so you are most likely to find black streaks on the north side of your house.
Why You Should Remove Streaks from Your Roof
While the effects of algae on your roof are only cosmetic at first, that’s reason enough to do something about the problem. Ugly black streaks will reduce your home’s curb appeal and, consequently, its value. A dirty roof can make potential buyers worry about needing to repair the roof in the future due to neglect.
If you leave the algae alone for long enough, they will start to cause structural damage to your roof. The dark layer that protects the algae from the sun makes your insulation less effective. It also holds in large amounts of moisture that will damage your shingles and make your roof a more hospitable climate for other molds and mosses.
Algae also eat away at the limestone in your asphalt shingles. In addition to wearing down their granules until your shingles break, the algae push their roots under and through roof tiles to loosen them.
How We Can Remove Black Streaks on Your Roof
When you want those black streaks cleaned quickly and thoroughly, call Bishoff Home Services. We use professional equipment that lets us work on your roof safely and effectively. With a soft washing technique and commercial cleansers, we will completely remove the algae, along with any lichens or mosses, without damaging your shingles.
Instead of attempting dangerous roof work yourself, turn to the professionals to ensure the job gets done right the first time, 100% satisfaction guarantee. Call 704-349-6008 today to schedule your roof cleaning or a free consultation.