Roof cleaning and moss removal in San Mateo.
From Baywood's shaded shingle roofs to tile in San Mateo Park, roof growth here follows the trees — and San Mateo has plenty. Our soft wash kills moss and algae at the root instead of blasting the surface, which is why the results hold 2–3 years instead of one season.
Get your San Mateo roof cleaning quote
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Call or text (628) 219-3491
Real before & afters from this service across the Peninsula.
Roof Cleaning, the right way.
We soft wash exclusively on roofing — low pressure, biodegradable detergent, and dwell time that kills moss, algae, and lichen at the root instead of blasting it off the surface. High pressure strips shingle granules and cracks tile, which is why we never use it up there.
Every roof job includes clearing valleys and ridge lines of debris, checking flashing and visible penetrations, and photographing the finished work. Results typically last 2–3 years.
San Mateo specifics: San Mateo runs the full range — downtown bungalows, Baywood and Aragon's tree-lined streets, Hillsdale ranches — and the mix of stucco, wood siding, and older brick keeps every job a little different. We work Baywood, Aragon, San Mateo Park, Hillsdale, and Shoreview regularly.
Four services.
Obsessively executed.
Common Burlingame service calls: moss removal from shaded roofs, brick walkway restoration in Burlingame Park, driveway cleaning in Easton Addition, and gutter clearing across the whole city after the rainy season.
Roof Cleaning & Moss Removal
Moss, algae, lichen and the black streaks on shingle, tile and cedar roofs — removed at the root with low-pressure soft washing. Never a pressure washer on a roof.
- Moss, algae & black streak removal
- Tile, shingle, cedar & slate
- Insurance roof notices
House Washing
Exterior house washing for stucco, wood, Hardie and painted siding. Green algae, black mildew and roofline grime gone — the result of a power wash without the damage.
- Stucco & siding cleaning
- Mildew, algae & cobweb removal
- Add exterior windows
Driveway & Patio Pressure Washing
Hot-water pressure washing that lifts oil, algae, moss and years of grime from concrete, brick, pavers, exposed aggregate and stone — without stripping the surface.
- Driveways & walkways
- Patios, decks & pool decks
- Brick & paver restoration
Gutter Cleaning
Gutters cleared by hand, every downspout flushed until it runs clear, and a look at the hardware for sagging, pulled spikes or separated seams. Book before the rains.
- Full debris removal
- Clogged downspouts cleared
- Damage inspection report
Our roof had moss so thick you couldn't see the tile. Nick's crew treated it, explained everything, and it still looks clean two years on.
A simple, respectful process.
We keep the back-and-forth to a minimum and the communication clear. Here's what working with us looks like.
Request an estimate
Call, text, or fill out our form. We respond within 24 hours with a clear, itemized quote.
On-site assessment
For larger jobs, we walk the property with you to confirm scope, materials, and the best method.
We do the work
On time, in uniform, with professional gear. Landscaping protected, neighbors respected.
Walkthrough & guarantee
We walk the finished job with you. If anything's not right, we fix it then and there.
Asked constantly.
How much does roof cleaning cost in San Mateo?
Most San Mateo roofs run from a few hundred dollars for a single-story to over a thousand for large, steep, or estate roofs. Size, pitch, material, and moss coverage set the price. Quotes are free and back within 24 hours.
Is soft washing safe for my roof?
Yes — it's the manufacturer-recommended method for shingle and tile alike. Low pressure plus the right detergent kills growth at the root without stripping granules or cracking tile.
How long will my roof stay clean?
Typically 2–3 years. Heavily shaded San Mateo roofs under tree canopy trend toward the shorter end.
Can roof moss affect my insurance?
Increasingly yes — California insurers review aerial imagery, and visible moss can trigger non-renewal. A soft wash returns the roof to insurable condition.
My insurance company flagged my roof in San Mateo. Can you help?
Yes, and it’s one of our most common San Mateo calls. We clean the roof with a method matched to the material, photograph it before and after, and give you a written service record for your agent. Details on our insurance roof notice page. Your carrier decides what satisfies its requirements.
What are the black streaks on my roof?
A roof algae called Gloeocapsa magma. It feeds on the limestone in asphalt shingles and spreads downhill with rain, which is why it starts on the shaded side. Soft washing kills it at the root. A pressure washer smears it and strips granules, so we never use one on a roof.
Everything we do here.
Let's handle your San Mateo roof work.
Free estimate within 24 hours. No pressure, no upsell, just a straight answer on what it'll cost and when we can start.
Questions? Email us anytime: pressurewashbynick@gmail.com