Those black streaks on roofs aren’t dirt — they’re caused by algae growth. Airborne algae spores land on shingles and feed on the limestone filler used in asphalt roofing.
Once algae takes hold, it spreads slowly across the roof, creating dark streaks that trap moisture and heat. Left untreated, this growth shortens the lifespan of shingles.
Professional roof washing removes algae safely without damaging roofing materials.
Roof discoloration is usually caused by a combination of factors, including:
These conditions allow algae to thrive and spread over time.
Roof staining isn’t only a cosmetic issue. Algae holds moisture against shingles, which accelerates deterioration.
Dirty roofs can lead to:
Roof washing protects both appearance and function.
Roofs should never be cleaned with high pressure. Pressure washing can:
Professional roof washing uses soft washing, not pressure.
Professional roof washing uses low-pressure application of specialized cleaning solutions that safely kill algae, moss, and lichen at the root.
The process includes:
This method removes growth without damaging shingles.
Soft washing relies on chemistry instead of force. It eliminates algae completely instead of just loosening surface stains.
This prevents:
Soft washing delivers longer-lasting results with zero surface harm.
Professional roof washing is safe for:
Each roof type is treated with surface-appropriate methods.
Most roofs benefit from professional washing every 2–3 years. Homes with heavy shade or moisture exposure may require more frequent service.
Routine washing prevents algae from becoming deeply embedded.
DIY roof cleaning often involves climbing on steep surfaces and using improper chemicals or pressure. This increases the risk of:
Professional services eliminate these risks.
Roofs make up a large portion of a home’s visible exterior. When they’re clean, the entire house looks newer and better maintained.
Clean roofs:
It’s one of the most impactful exterior improvements.
Professional roof treatments kill algae at the root rather than spreading it. Proper application prevents quick regrowth and preserves shingle integrity.
This keeps roofs cleaner for years, not months.
Replacing a roof is one of the most expensive home repairs. Routine washing protects shingles and delays replacement for years.
It’s preventative maintenance that saves money long-term.
If your roof has dark streaks or green growth, professional roof washing can restore appearance and protect your shingles safely.
Schedule a free consultation today and keep your roof clean, protected, and performing the way it should.
Give your home or business the care it deserves. Request a free quote now and let Dirt Defense provide spotless results with unmatched reliability.
