Moss & Lichen Removal — Bay Area Peninsula & East Bay
Protect Your Roof, Siding, & Hardscapes from Destructive Growth
Get Your Free Estimate ☎ (650) 248-0727The Bay Area’s coastal fog, mild temperatures, and wet winters create the perfect environment for moss, lichen, and algae to take over your roof, siding, walkways, and fences. What starts as a thin green film quickly becomes thick, root-like growth that traps moisture, breaks down surfaces, and causes thousands of dollars in damage. Miller’s Pressure Washing provides professional moss and lichen treatment that kills growth at the root — not just on the surface.
⚠ Moss & Lichen Are Now Costing Bay Area Homeowners Their Insurance
Insurance companies across California are canceling homeowners policies based on visible moss, algae, and lichen on roofs — using drone and satellite imagery to inspect properties remotely. Over 2.8 million policies have been non-renewed in recent years. Professional treatment removes these red flags and provides documentation that can prevent or reverse insurance cancellations.
Why Moss & Lichen Are Dangerous
- ✓ Roof damage — Moss roots (rhizoids) pry up shingles and tiles, allowing water underneath. Lichen produces acids that eat through roofing materials.
- ✓ Trapped moisture — Moss acts like a sponge, holding water against your roof and promoting rot, mold, and leaks.
- ✓ Shortened roof life — Untreated moss can reduce your roof’s lifespan by 10-15 years.
- ✓ Clogged gutters — Moss and lichen debris fills gutters, causing water overflow and foundation damage.
- ✓ Slippery surfaces — Moss on walkways, patios, and stairs creates a serious slip-and-fall hazard.
- ✓ Curb appeal — Green and black growth makes your home look neglected and reduces property value.
- ✓ Insurance risk — Visible roof moss is now one of the top reasons insurers cancel California homeowners policies.
Surfaces We Treat
Roofs →
Asphalt shingles, clay tile, slate, composite — soft wash kills moss and lichen at the root without damage.
Siding & Walls →
Wood, stucco, brick, stone — we remove green growth and black staining from all exterior surfaces.
Driveways & Walkways →
Concrete, pavers, flagstone — eliminate slippery moss and restore safe, clean walking surfaces.
Decks & Stairs →
Wood, composite, Trex — moss makes decks dangerously slippery. We clean and restore safely.
Patios →
Concrete, pavers, brick — remove years of moss and lichen buildup from your outdoor living spaces.
Fences & Retaining Walls
Wood, stone, masonry — restore privacy fences and retaining walls covered in green growth.
Our Soft Wash Method vs. High-Pressure Blasting
✓ Our Soft Wash Method
- ✓ Kills moss and lichen at the root
- ✓ Results last 2-3 years
- ✓ Safe for all surfaces
- ✓ No damage to shingles, tiles, or paint
- ✓ Eco-friendly, biodegradable solutions
- ✓ Prevents regrowth
✗ High-Pressure Blasting
- ✗ Only removes surface growth
- ✗ Moss returns within weeks
- ✗ Strips shingle granules
- ✗ Cracks tile and mortar
- ✗ Forces water behind walls
- ✗ Can void roof warranties
Why Choose Miller’s Pressure Washing
★★★★★ 5.0 Stars — 152+ Google Reviews
- ✓ 9+ years treating moss and lichen across the Bay Area
- ✓ Safe soft wash methods that protect your surfaces
- ✓ Results that last 2-3 years, not weeks
- ✓ $1M/$2M general liability insurance
- ✓ BBB A+ rated • Nextdoor Neighborhood Fave 2023, 2024, 2025
Areas Most Prone to Moss & Lichen
The Bay Area’s fog belt and tree-covered neighborhoods are especially susceptible:
Half Moon Bay • Pacifica • Woodside • Portola Valley • Menlo Park • Atherton • Hillsborough • Burlingame • Redwood City • Daly City • San Leandro • Hayward
Moss Taking Over? We’ll Kill It at the Root.
Free, no-obligation estimate. We’ll assess the growth and recommend the right treatment for every surface.
Get Your Free Estimate ☎ (650) 248-0727