Soft Washing in San Diego, CA

Not every surface can handle 3,000 PSI of water pressure. Stucco walls crack. Painted siding peels. Asphalt shingles lose granules. Soft washing solves the cleaning problem that pressure washing creates — using low pressure (under 500 PSI) and biodegradable cleaning solutions that kill the organic growth at the root, not just blast it off the surface.

Top Tier Exterior Service provides professional soft washing throughout San Diego County. We treat algae, mold, mildew, lichen, and bacterial buildup on stucco, painted siding, asphalt shingle roofs, fences, decks, and outdoor furniture — without the surface damage that high-pressure cleaning causes.

When Soft Washing Beats Pressure Washing

Pressure washing works for hard surfaces — concrete, brick, unsealed pavers. Soft washing is the correct method for everything else:

• Stucco exteriors — San Diego is heavy stucco country. High pressure forces water into hairline cracks and causes long-term moisture damage. Soft wash removes the algae and mildew without driving water into the wall.
• Asphalt shingle roofs — High pressure strips granules off shingles and voids most roofing warranties. Soft washing kills the algae (those black streaks are Gloeocapsa magma cyanobacteria) at the spore level and adds years to your roof's life.
• Painted wood and siding — High pressure peels paint and gouges wood grain. Soft wash cleans without damaging the finish.
• Pool screens and enclosures — Aluminum framing and screen mesh damage easily. Soft wash is the only safe option.
• Vinyl siding — High pressure can force water behind the vinyl. Soft wash cleans the surface safely.

What We Soft Wash

• Stucco walls and trim
• Asphalt shingle, tile, and metal roofs
• Painted wood siding and trim
• Vinyl and fiber cement siding
• Fences (wood, vinyl, composite)
• Outdoor furniture and umbrellas
• Pool enclosures and screens
• Awnings and canopies
• Composite decking

The San Diego Algae and Mildew Problem

San Diego's coastal climate — morning marine layer, ocean humidity, mild winter temperatures — creates ideal growing conditions for algae, mildew, and lichen on exterior surfaces. Coastal neighborhoods like La Jolla, Del Mar, Solana Beach, and Coronado see the worst of it, but inland properties in Poway, Rancho Santa Fe, and Carlsbad aren't immune.

The black streaks on north-facing roofs, the green tint on stucco walls under shade, the pink stain on rooflines — those are living organisms feeding on the surface itself. Pressure washing knocks them off temporarily. Soft washing kills them, so they don't return in weeks.

Our Soft Washing Process

1. Surface assessment — We identify the surface material, growth type, and the appropriate cleaning solution. Stucco gets a different mix than roof shingles.

2. Plant and landscape protection — We pre-wet and cover landscaping. Our solutions are biodegradable, but plants don't like surfactants regardless.

3. Application — Low-pressure application of our cleaning solution. Dwell time varies by surface and severity — typically 10-30 minutes.

4. Rinse — Low-pressure rinse with fresh water. No high-pressure blasting that damages the surface.

5. Walkthrough — We check the work in direct light before we leave. Anything missed gets re-treated on the spot.

Service Areas

La Jolla, Del Mar, Rancho Santa Fe, Solana Beach, Poway, Encinitas, Carlsbad, Coronado, Point Loma, Chula Vista, La Mesa, El Cajon, Santee, and all of San Diego County.

Frequently Asked Questions

How is soft washing different from pressure washing?
Soft washing uses low pressure (under 500 PSI — about the pressure of a garden hose) combined with cleaning solutions that kill organic growth. Pressure washing uses high pressure (1,500-4,000 PSI) and relies on water force alone. Soft wash is for delicate surfaces; pressure wash is for hard surfaces.

Will soft washing damage my plants?
No. We pre-wet landscaping, cover sensitive plants, and use biodegradable solutions. We also rinse foliage after the job to neutralize any solution that lands on plants.

How long does soft washing last?
Most properties stay clean for 18-24 months because we kill the organism at the root rather than just blasting the surface. Pressure-washed surfaces typically need re-cleaning in 6-12 months.

Is soft washing safe for my roof?
Yes — when done correctly. Asphalt shingle manufacturers recommend soft washing and most warranties require it instead of pressure washing. We follow ARMA (Asphalt Roofing Manufacturers Association) guidelines.

Will the smell from the cleaning solution stick around?
No. Any solution residue rinses off and dissipates within a few hours. There's no lingering chemical smell after the job.

Get a Free Soft Washing Quote

San Diego's climate is hard on exterior surfaces — and the wrong cleaning method makes the damage worse. Soft washing is the right approach for stucco, roofs, siding, and any painted or delicate surface.

Call or text: (619) 890-8888

Top Tier Exterior Service — Veteran-owned. San Diego standard for exterior cleaning.