Those black streaks aren't dirt. They're bacteria. We kill them at the root.
If your Foley AL roof has dark streaks running down it, you're seeing Gloeocapsa magma — a hardy bacteria that thrives in Gulf Coast humidity and feeds on the limestone in asphalt shingles. Pressure washing won't fix it; it'll grow back in months. And high-pressure water on shingles voids most manufacturer warranties.
Roof soft washing is the only correct answer. Baldwin Preaux Wash applies a low-pressure cleaning solution that kills the bacteria at the root. The streaks dissolve and rinse away with normal rain over the next few weeks — and they stay gone for 4–7 years.
High-pressure water on asphalt shingles strips the granular surface that protects the shingle from UV. Once those granules are gone, the shingle dries out, cracks, and fails years early. That's why every major shingle manufacturer (GAF, Owens Corning, CertainTeed) explicitly warns against pressure washing.
Baldwin Preaux Wash uses a soft-washing pump that delivers cleaning solution at the same pressure as a garden hose. It's manufacturer-approved, won't void your warranty, and won't reduce your roof's lifespan by a single year.
Soft-washed roofs typically stay clean for 4–7 years. Roofs in heavy shade or under heavy tree canopy may need re-treatment sooner. Most Baldwin County customers re-treat every 5 years as part of an annual exterior maintenance routine.
For a small additional charge, we can also apply a preventative algae-resistant treatment that further extends the time between cleanings.
Get your free, no-obligation quote today. Most quotes returned within 1 business hour.