real_work // shingle_roof_wash_zinc_san_ramon
SAN RAMON SHINGLE ROOF
BEFORE & AFTER.
// before
// after
Same result for your San Ramon shingle roof. Call or text for a free estimate.
Asphalt shingle roof soft wash and zinc strip installation in San Ramon. Moss, algae, and black streaks removed — zinc treatment slows regrowth after cleaning. Owner-operated. Free estimates.
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San Ramon's Tri-Valley location gives it dry, hot summers — but winter rainfall and spring fog still provide enough biological pressure for moss and algae to establish on asphalt shingles, particularly on north-facing roof slopes and sections shaded by mature trees. The black streaks that appear on shingles across the Tri-Valley are Gloeocapsa magma, a cyanobacteria that feeds on the limestone filler in asphalt shingles. The streaks are not cosmetic — the organism accelerates granule loss and shortens shingle lifespan if left untreated.
After a professional soft wash removes biological growth, zinc strip installation at the ridgeline creates a long-term slow-release biocide that delays regrowth significantly. Every time it rains, dilute zinc ions wash down the roof slope. Zinc is toxic to moss, algae, and lichen at low concentrations — it doesn't prevent regrowth indefinitely, but it meaningfully extends the interval between cleanings. For San Ramon homeowners, zinc treatment turns a 3-year cleaning cycle into a 5 to 7 year one.
High-pressure washing strips protective granules from asphalt shingles, accelerating wear and voiding most manufacturer warranties. Soft wash — biodegradable solution at low pressure — kills biological growth without mechanical damage to the shingle surface.
Ready for a free San Ramon shingle roof wash and zinc treatment estimate? Call or text — same-day response.
Roof walked before any treatment. Shingle condition assessed — curling tabs, granule loss areas, and open valleys noted. Moss density and distribution mapped. Any damaged flashing or visible leak entry points reported to homeowner.
All plants, lawn areas, and landscaping below the roofline pre-wetted before treatment. Treatment solution is biodegradable, but pre-wetting the landscaping is standard practice — particularly for Tri-Valley properties with established gardens.
Biodegradable treatment solution applied to the full roof surface at low pressure. Solution penetrates and kills moss, algae, lichen, and Gloeocapsa magma at the root. Dwell time held until penetration is complete.
Roof rinsed at low pressure — no granule-stripping high-pressure wand work. Rinse confirms treatment has covered the full roof surface and washes loosened material off the shingles.
Zinc strips installed at the ridgeline beneath the top course of shingles. Strips exposed to allow rain to wash zinc ions down the slope. Installation does not disturb shingle overlap or create new penetrations when done correctly.
Roof and gutters checked post-rinse. Shingle condition and zinc placement confirmed. Landscaping below rinsed to clear residue. Any findings from the inspection communicated before we leave.
San Ramon asphalt shingle roof wash and zinc treatment — moss, algae, and black streaks removed. Free estimates.
Same result for your San Ramon shingle roof. Call or text for a free estimate.
Straight answers for San Ramon 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 asphalt shingles. Its dark UV-protective pigment creates the characteristic black streaking. Left untreated, it accelerates granule loss and shortens shingle lifespan.
No. High-pressure washing strips protective granules and can lift shingle tabs. The correct method is soft wash — biodegradable solution at low pressure — which kills biological growth without damaging the shingle surface.
Zinc strips at the ridgeline release zinc ions with every rain event. Zinc is toxic to moss and algae at low concentrations, significantly slowing regrowth after cleaning. Extends a 3-year cleaning cycle to 5–7 years on most San Ramon properties.
Typically 3 to 5 years without zinc. With zinc treatment, many properties go 5 to 7 years before regrowth returns to the point where cleaning is needed again.
No. Biodegradable solution is safe for asphalt shingles. Landscaping is pre-wetted before treatment and rinsed after.
Yes. Bull Run Exterior Wash LLC is fully licensed and carries general liability insurance on every job.
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