If you’ve spent any time driving through Harford County neighborhoods like Bel Air or Jarrettsville, you’ve likely noticed them: those unsightly, dark, vertical streaks staining otherwise beautiful roofs.
At Mid Atlantic Gutters and Roofing, LLC, we get asked all the time: “Is my roof burning? Is it soot? Do I need a whole new roof?”
The truth is, those streaks aren’t dirt or fire damage—they are alive. Here is the “why” behind those stains and how our status as a CertainTeed ShingleMaster™ contractor allows us to provide a permanent solution.
What Are Those Black Streaks?
The culprit is a hardy type of blue-green algae called Gloeocapsa magma. Maryland’s humid climate is the perfect breeding ground for it. The algae feed on the limestone filler used in many standard asphalt shingles.
As the algae colony grows and spreads down the slope of your roof, it leaves behind a dark, protective pigment that creates those “tiger stripes.” Not only does this ruin your home’s curb appeal, but over time, it can lead to increased heat absorption, raising your cooling costs in the summer.
The Solution: CertainTeed’s StreakFighter® Technology
We don’t believe Maryland homeowners should have to power-wash their roofs (which can actually damage your shingles and void warranties). Instead, we install CertainTeed shingles equipped with StreakFighter® technology.
How It Works: The Power of Copper
The “secret sauce” is in the granules. CertainTeed embeds copper-infused granules into the surface of the shingles.
- Natural Protection: Copper is naturally toxic to algae.
- Time-Released Defense: As it rains, the shingles slowly release copper ions over the entire roof surface.
- Algae Prevention: These ions create an environment where Gloeocapsa magma simply cannot survive or take root.
Why Choose a ShingleMaster™ Contractor?
As a CertainTeed ShingleMaster, Mid Atlantic Gutters and Roofing, LLC is trained to install the full Integrity Roof System. When we use products like the Landmark® Series, you aren’t just getting a roof that stays clean—you’re getting a professional installation backed by one of the best warranties in the industry.
Pro Tip: While you’re upgrading your roof’s defense, don’t forget the gutters! Pairing a StreakFighter roof with our K Guard Leaf-Free Gutter System ensures that your home stays beautiful and water-tight from the ridge cap to the downspout.
Ready to Protect Your Curb Appeal?
Don’t let algae streaks devalue your home. Whether you are in Bel Air, Jarrettsville, or Pylesville, we are here to help you choose a roof that stays as bright as the day it was installed.
Contact Mid Atlantic Gutters and Roofing today for a free estimate!