House & Siding Washing — Soft Wash Only, Zero Damage
Low-pressure soft washing under 500 PSI for every siding type. Stucco, vinyl, HardiePlank, wood. Never pressure washed.
Your Siding Protected — Not Damaged
Your home's siding is the largest surface area on your property — and the most expensive to repair if damaged. Bay Area fog, coastal humidity, and the microclimate variations from the Peninsula to the South Bay create the perfect environment for algae, mildew, mold, and mineral staining on every siding type. Willow Wash exclusively uses low-pressure soft washing (under 500 PSI) with biodegradable solutions for all house and siding cleaning. High pressure on siding forces water behind panels, cracks stucco, strips HardiePlank paint, and creates moisture intrusion that leads to rot. We never do that.
Siding Types We Clean
Vinyl Siding
Soft wash removes algae, mildew streaks, and oxidation from vinyl without warping panels or forcing water behind the surface.
Stucco Exterior
Biodegradable solutions applied at under 200 PSI — safe for stucco's porous surface without creating hairline cracks.
HardiePlank / Fiber Cement
Paint-safe soft washing that removes biological growth and atmospheric staining without stripping the factory finish.
Wood Siding
Low-pressure treatment that cleans without raising grain or splintering. Safe for painted and stained wood.
Aluminum Siding
Removes chalk oxidation and dark algae streaks that develop on aluminum over time.
Brick Exterior
Efflorescence removal and algae treatment for brick surfaces, at PSI calibrated to protect mortar joints.
Our House Washing Process
Surface Inspection
We assess each siding type, note any problem areas, cracks, or failing caulk before applying any product.
Plant and Surface Protection
All landscaping, windows, and sensitive surfaces are protected or pre-watered before cleaning begins.
Solution Application and Dwell Time
Biodegradable cleaning solutions are applied at low pressure and allowed to dwell — breaking down algae and mildew chemically.
Low-Pressure Rinse
Final rinse under 500 PSI carries away all residue. Clean, streak-free results on every surface.
What Sets Us Apart
Soft Wash Only — Always
We never use high pressure on house siding. Not on vinyl, not on stucco, not on any painted surface. Period.
Biodegradable Chemistry
All solutions are plant-safe and stormwater compliant. We pre-water landscaping and rinse completely after every job.
No Moisture Intrusion
Our low-pressure technique keeps water from being forced behind panels — the primary cause of mold inside walls after improper washing.
Licensed, Insured, Guaranteed
Fully licensed and insured in California. 100% satisfaction guarantee on every job.
Get Your Free Estimate
Most Bay Area quotes within 24 hours
Common Questions
Everything you need to know about our exterior cleaning services across the Bay Area.
Related Services
Roof Cleaning
Soft wash removal of moss, algae, and lichen from tile, shingle, and metal roofs without voiding manufacturer warranties.
Learn More →Pressure Washing
Professional pressure washing for driveways, walkways, patios, and concrete surfaces. Removes oil stains, tire marks, and embedded grime.
Learn More →Window Cleaning
Streak-free residential window cleaning for single and multi-story Bay Area homes. Interior and exterior service available.
Learn More →Solar Panel Cleaning
Restore lost efficiency from dust, pollen, and bird droppings. Dirty panels lose up to 25% output — professional cleaning recovers it.
Learn More →Gutter Cleaning
Complete gutter cleaning, flushing, and inspection for Bay Area homes. Prevents water damage, foundation issues, and landscaping erosion.
Learn More →Proudly Serving 36+ Bay Area Communities
Professional exterior cleaning for homes and businesses across the San Francisco Bay Area.
Your Property Deserves the Best Care
Free estimates. Eco-friendly methods. 100% satisfaction guaranteed. Residential and commercial. Let's talk about your project.