The Hidden Dangers of a Dirty Roof (And How to Clean It Safely)

by | Jul 24, 2025 | Blogs

A dirty roof doesn’t just look bad—it can cause serious damage if left untreated.

The Problem with Black Streaks and Algae:

  • Caused by Gloeocapsa magma, a black algae that thrives in humid climates like Sanford’s.

  • Traps moisture on shingles leading to rot and shortened lifespan.

  • Can void shingle manufacturer warranties if ignored.

Risks of Moss and Mold:

  • Moss retains moisture and can lift shingles, causing leaks.

  • Mold can spread to soffits and fascia, damaging your home’s exterior.

Safe Cleaning Methods:

  • Soft washing uses low pressure with eco-friendly detergents to kill algae at the root.

  • Avoid harsh pressure washing that damages shingles and voids warranties.

Cost vs. Replacement:

Regular roof cleaning costs a fraction of the price of roof replacement—saving thousands over time.

Testimonials from Sanford Homeowners:

“Straight Streamin brought my roof back to life without any damage or mess. I’ll never try DIY again!” – Jason T.