Moss, lichen, and algae removed from Burlingame Spanish terracotta tile roofs with low-pressure soft wash — no cracked tiles, no water forced under ridgeline caps. Free estimates.
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Burlingame's coastal fog and consistent marine moisture make it one of the highest biological-growth environments in San Mateo County. Spanish terracotta tile roofs are especially vulnerable — the curved, porous surface traps moisture and organic debris, and north and west-facing slopes that stay shaded through the morning can remain damp enough to sustain moss and lichen growth year-round. Left untreated, biological growth works into tile joints and mortar lines, accelerating deterioration and shortening roof life significantly.
Terracotta tile is hollow and relatively brittle. High-pressure washing cracks tiles, dislodges ridge and hip mortar, and forces water under cap tiles — all of which create leak paths. We use a low-pressure soft wash method: a cleaning solution is applied at low pressure, allowed to dwell, and rinsed off at low pressure. The chemistry kills the biological growth; the water just rinses the residue away.
Soft wash removes active moss colonies, lichen patches, black algae streaks, and general organic staining from terracotta tile surfaces. It also neutralizes spore material, which slows regrowth compared to a water-only rinse that leaves biological residue in place.
Ready for a free Spanish tile roof wash estimate in Burlingame? Call or text — same-day response.
Roof walked before any water is applied. Cracked or broken tiles noted, ridge mortar condition checked, valley flashing inspected. Any structural concerns are flagged before cleaning begins.
Plants and landscaping below the roofline pre-wetted with water before solution application. This protects established vegetation from runoff during the cleaning process.
Loose debris blown from valleys, gutters, and tile surfaces before solution is applied — accumulated debris traps moisture and can interfere with even solution distribution.
Soft wash solution applied to tile surface at low pressure. Solution contacts moss, lichen, and algae and begins breaking down biological material. Dwell time matched to growth density.
Roof rinsed at low pressure to remove solution and loosened biological material. No water forced under ridge caps or hip tiles — rinse pressure stays well below tile-safe thresholds.
Roof inspected after rinse. Valleys and gutters checked for debris accumulation from the wash. Any cracked or displaced tiles found during the process reported to the homeowner before leaving.
Burlingame Spanish tile roof washed safely — low pressure, no cracked tiles. Free estimates.
Burlingame Spanish terracotta tile roof soft wash — moss, lichen, and algae removed with low-pressure application. No cracked tiles.
Same result on your Burlingame tile roof. Call or text for a free estimate.
Straight answers for Burlingame homeowners. Don't see yours? Call or text (408) 598-1857.
The curved, porous surface traps moisture and organic debris — ideal conditions for biological growth. Burlingame's coastal fog and marine moisture accelerate growth significantly compared to drier inland climates. North and west-facing slopes that stay shaded and damp are typically the worst affected.
High pressure is not appropriate for terracotta tile. The tiles are hollow and brittle — high pressure cracks them and forces water under ridgeline caps, creating leak paths. We use a soft wash method: low-pressure solution application followed by a low-pressure rinse. The chemistry does the work, not the pressure.
Every 3 to 5 years is typical for Burlingame's coastal climate. North-facing or heavily shaded roofs may need attention sooner. The goal is removing active biological growth before it works into tile joints and causes damage.
Pre-wetting and thorough rinsing of vegetation below the roofline protects plants during the wash. We pre-wet before applying solution and rinse thoroughly — runoff is diluted enough by that point that established plants are not at risk. Sensitive plantings are flagged before we start.
We identify and report cracked tiles during the job. Tile replacement is not part of our scope — we flag them before leaving so you can schedule a roofer if needed.
Yes. Bull Run Exterior Wash LLC is fully licensed and carries general liability insurance on every job.
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