If you’ve ever looked up at your roof and noticed black streaks running down the shingles, you’re not alone. Homeowners across the country see these unsightly stains and wonder what they are—and whether they’re a big deal.
Spoiler alert: they are. But the good news? PowerSoft can help.
What Are the Black Streaks?
Those streaks are likely caused by a type of algae called Gloeocapsa magma. It thrives in warm, humid environments and feeds on the limestone filler commonly used in asphalt shingles. Over time, this algae spreads and darkens, forming the black stains you see.
These streaks often start on the north-facing part of your roof or areas that get less sun. If left untreated, they can take over your entire roof surface.
Why Should You Care?
Why Should You Care?
Black streaks aren’t just ugly—they can lead to real problems:
🛑 Reduced Curb Appeal
First impressions matter, especially if you’re planning to sell your home. Stained, streaky roofs make your property look older and neglected.
🧊 Shortened Roof Lifespan
Algae holds moisture against your shingles, which can lead to premature wear, granule loss, and eventually leaks or deterioration.
💸 Higher Energy Bills
Dark streaks absorb more heat, which can increase the temperature inside your home and strain your cooling system—especially during summer.
🦠 Potential Mold Growth
In humid climates, the algae can promote mold or lichen growth, which may eventually damage your roof’s structure.
How PowerSoft Can Help
How PowerSoft Can Help
We use a low-pressure, soft wash system that safely removes algae, mold, mildew, and other contaminants without damaging your shingles.
Our roof cleaning process:
Soft washing is recommended by shingle manufacturers and complies with industry standards for roof care.
Don’t Replace—Restore
Many homeowners think they need a new roof when all they really need is a professional cleaning. Let PowerSoft evaluate your roof and recommend the best solution before you commit to costly repairs or replacement.
Don’t Replace—Restore
Many homeowners think they need a new roof when all they really need is a professional cleaning. Let PowerSoft evaluate your roof and recommend the best solution before you commit to costly repairs or replacement.
Schedule Your Roof Cleaning Today
If you're tired of those black streaks and want your roof looking like new again, contact PowerSoft today for a free estimate. Your home deserves to look its best—from the ground to the roof.
