Algae, moss, and lichen removed from asphalt shingle roofs in Mountain View. Soft wash — low pressure, no granule damage. Zinc strips installed at the ridge to prevent regrowth. Free estimates.
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The black streaks on Mountain View asphalt shingle roofs are Gloeocapsa Magma — a cyanobacteria that feeds on the limestone filler in shingles. Mountain View's coastal-influenced climate, morning marine layer, and mature street tree canopy create ideal conditions for algae to spread quickly from property to property. Left untreated, it retains moisture against the shingle surface and accelerates granule loss and premature aging.
High-pressure washing destroys granules and voids most asphalt shingle warranties. We use soft wash — typically under 100 psi at the nozzle with a biodegradable algaecide solution that kills algae, moss, and lichen at the root. The ARMA-recommended method. The roof is treated, not blasted.
After cleaning, we install zinc strips at the ridge line. Zinc oxide leeches down the roof surface with every rain in a thin invisible layer that prevents new biological growth from establishing. It's the most effective long-term preventative — extending the clean window significantly compared to a wash alone.
Ready for a free estimate in Mountain View? Call or text — same-day response.
Assess algae coverage, moss depth, lichen patches, and overall shingle condition. Note any damaged or missing shingles before starting.
Low-pressure rinse to remove loose debris from roof surface, valleys, and gutters before applying treatment solution.
Apply biodegradable algaecide solution at low pressure across the entire roof surface. Solution penetrates and kills algae, moss, and lichen at the root level.
Rinse treated surface to remove dead biological matter and residual solution. Gutters cleared of debris.
Install zinc strips along the ridge line. Zinc oxide leeches down with every rain, continuously inhibiting new algae and moss growth for years.
Soft washed clean. Zinc protection installed. Call or text for a free Mountain View estimate.
Mountain View asphalt shingle roof — algae streaking and moss removed with soft wash, zinc strips installed at the ridge.
Same result on your Mountain View roof. Call or text for a free estimate.
Straight answers for Mountain View homeowners. Don't see yours? Call or text (408) 598-1857.
The black streaks are Gloeocapsa Magma — a cyanobacteria that feeds on the limestone filler in shingles. Mountain View's coastal climate and tree canopy create ideal spread conditions. Left untreated, it retains moisture and accelerates granule loss.
Yes. Soft wash uses low pressure (under 100 psi) with biodegradable algaecide that kills growth at the root. High-pressure washing destroys granules and voids warranties — soft wash is the ARMA-recommended method.
Zinc strips at the ridge leech zinc oxide down the roof surface with every rain — a thin invisible layer that prevents new algae and moss from taking hold. It's the most effective long-term preventative available for asphalt shingles.
Most roofs stay clean 2–5 years after treatment. North-facing planes under tree canopy recolonize faster. Zinc strip treatment at the ridge extends that window significantly by continuously inhibiting regrowth every time it rains.
Yes. Bull Run Exterior Wash LLC is fully licensed and carries general liability insurance on every job.
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