Those Black Streaks Aren't Dirt
The dark streaks running down shingles all over Collin County are Gloeocapsa magma — an airborne algae that feeds on the limestone filler in asphalt shingles. Left alone, it spreads, holds moisture, degrades shingles years ahead of schedule, and can even void manufacturer warranties. Pressure washing a roof strips granules and destroys it; that's why we never put pressure on a roof.
Our soft wash process
- Roof inspection and photo documentation
- Application of a soft-wash solution (the same chemistry shingle manufacturers recommend)
- Algae, moss and lichen killed at the root — streaks fade immediately and rinse away with the next rains
- Landscaping protected and rinsed throughout
Sell-ready and insurance-ready
A streaked roof is one of the first things buyers and insurance inspectors flag. If you're listing your Princeton home or facing a policy renewal inspection, a roof wash is one of the cheapest ways to take years off your home's apparent age.
Frequently Asked Questions
Is soft washing safe for asphalt shingles?
Yes — it's the method recommended by the Asphalt Roofing Manufacturers Association. No pressure touches the roof; the solution does the work.
How long does a roof cleaning last?
Typically 3–5 years before streaks begin returning, depending on shade and humidity on your lot.
How much does roof washing cost in Princeton?
Most homes run $350–$650 depending on roof size and pitch. Call or text for a same-day quote from a satellite measurement.
Will it get rid of moss and lichen too?
Yes. Moss and lichen die within days of treatment and release from the shingles over the following weeks with normal weather.
Get Your Free Quote Today
Call or text (469) 555-0123 — or request a quote online and we'll respond the same day.