Those black streaks on your roof aren’t dirt. In most cases, they’re caused by algae growth that feeds on roofing materials.
Left untreated, algae spreads quickly and traps moisture against shingles. Professional roof washing removes this growth before it leads to premature wear and costly repairs.
Roof staining is usually caused by airborne algae spores that settle and grow over time. Common contributors include:
Once algae establishes itself, it spreads across large sections of the roof.
One of the biggest roofing mistakes is using high pressure. Pressure washing can:
Roof washing should never rely on high pressure.
Professional roof washing uses a low-pressure, treatment-based method often called soft washing.
This process:
The roof is cleaned without damage.
Algae feeds on limestone filler in shingles, slowly breaking them down. As this happens, shingles lose granules and protective coating.
Routine roof washing:
Cleaning is preventative maintenance.
The longer algae remains, the deeper it embeds itself. Older staining requires stronger treatment and increases the risk of permanent discoloration.
Early roof washing is gentler and more effective.
Most roofs benefit from professional roof washing every 2–3 years, depending on shade, climate, and exposure.
Homes with heavy tree cover may require more frequent service.
DIY roof cleaning puts homeowners at risk of:
Professional roof washing ensures safety, proper treatment, and lasting results.
A stained roof darkens the entire home. Once cleaned, siding, trim, and landscaping all appear brighter.
Many homeowners are surprised by how much younger their home looks after roof washing.
Professional treatments neutralize algae spores instead of masking stains. This significantly slows regrowth.
Correct technique also prevents shingle damage that accelerates future staining.
Replacing a roof is expensive. Roof washing costs a fraction of replacement and helps delay that cost for years.
It’s one of the smartest ways to protect your home’s exterior investment.
If your roof has dark streaks or uneven discoloration, professional roof washing can restore its appearance and protect your shingles.
Schedule a free consultation today and keep your roof clean, protected, and built to last.
Give your home or business the care it deserves. Request a free quote now and let Dirt Defense provide spotless results with unmatched reliability.
