When we handle soft washing for fiber cement siding in California, it comes down to three things: protecting your plants and property, cleaning with the right method, and walking the job with you at the end. On fiber cement siding, the method we use is soft wash.
The right method for the job
Cleaning solution: A mild detergent or diluted house-wash solution, rinsed with low-pressure water.
What to know about cleaning fiber cement siding
Fiber cement siding is durable and holds paint well, but its factory finish can be marked by high pressure, and manufacturers' care guides generally recommend low-pressure cleaning. Check your siding's care instructions if it is still under warranty.
Avoid: High pressure and close-range spraying, which can damage the finish and void the finish warranty.
How often: Every 1-2 years.
When to book soft washing for fiber cement siding
- Green, black or gray film on siding, especially on the north side
- Black streaks running down the roof
- Moss or lichen on shingles or tile
- A musty smell around shaded walls
- Pressure washing would damage the surface
Why it gets dirty
- Algae, mold and mildew that grow in shade and humidity
- Roof algae that feeds on the limestone filler in shingles
- Pollen and dust that give growth something to hold on to
- Sprinklers and gutters that keep walls damp
What you can do yourself
- Trim back branches and shrubs that touch the house so walls can dry
- Keep gutters clear so water doesn't overflow down the siding
- Spot-clean small areas with a soft brush and mild detergent
- Aim sprinklers away from the house
Not sure what you're looking at? The free stain identifier and safe pressure guide explain each stain and surface.
Why more pressure isn’t better
- Using too strong a mix, which can burn plants and fade surfaces
- Using too weak a mix, which leaves growth alive and it returns quickly
- Climbing ladders with a spray wand and chemicals
- Mistaking soft washing for 'pressure washing on low'
How we handle soft washing for fiber cement siding
- Identify the surfaces and the type of growth
- Pre-wet plants, cover sensitive fixtures and close windows
- Apply a solution mixed for the surface and let it dwell
- Rinse at low pressure from the top down
- Rinse plants again and check every side with you
How much does soft washing for fiber cement siding cost?
What moves the price:
- Size: square footage of siding, roof or flatwork
- Condition: heavy growth, old stains and peeling finishes take longer
- Access: number of stories, roof pitch, slopes and how close we can park
- Add-ons: sealing, gutter brightening and other services done in the same trip
These are typical U.S. ranges, not a quote. You get an exact price before any work starts. For a quick estimate, try the pressure washing cost calculator.
Other services for fiber cement siding
- House Washing for Fiber Cement Siding
- Exterior Mold & Mildew Removal for Fiber Cement Siding
- Pre-Paint Washing for Fiber Cement Siding
Local soft washing for fiber cement siding for California
In California, stucco and siding mostly collect dust, cobwebs and sprinkler spots, while shaded walls can grow mildew after winter rains. A soft wash handles both without etching stucco.
Near the coast, salt air leaves a film on siding, windows, screens and railings that dulls finishes and speeds up corrosion on metal. Regular rinsing and washing help protect them.
Much of California has hard water. Sprinklers and misters leave white mineral spots on walls, windows, fences and pool tile, and those spots need a mineral-safe cleaner, not more pressure.
Some cities in California limit outdoor water use, including washing hard surfaces with a hose, especially during drought declarations. Pressure washers use far less water than an open garden hose, but rules vary, so it's worth checking your city's current restrictions. Wash water should also be kept out of storm drains.
We cover 841 cities and towns across California. Find soft washing for fiber cement siding in your city:
- Los Angeles
- San Diego
- San Jose
- San Francisco
- Fresno
- Sacramento
- Long Beach
- Oakland
- Bakersfield
- Anaheim
- Riverside
- Santa Ana
Soft Washing for Fiber Cement Siding: frequently asked questions
How much does soft washing for fiber cement siding cost in California?
Soft Washing for Fiber Cement Siding typically costs $300-$800 for a typical single-family home exterior, and usually takes 2-4 hours. The exact price depends on the size and condition, and you get it before any work starts. Call (555) 010-0000 for a free quote.
Do you use high pressure for soft washing for fiber cement siding?
For fiber cement siding: soft wash, typically under 500 PSI; most manufacturers advise against high-pressure washing. What we avoid: high pressure and close-range spraying, which can damage the finish and void the finish warranty. The cleaning solution does most of the work, followed by a gentle rinse.
Is soft washing for fiber cement siding safe for my plants and pets?
We pre-wet plants and lawns, keep cleaning solutions diluted to what the surface needs, and rinse landscaping again when we finish. Keep pets and children inside until surfaces are rinsed and dry.
How often should I schedule soft washing for fiber cement siding?
Every 1-2 years. Shade, nearby trees, humidity and heavy traffic mean more frequent cleaning; sunny, dry spots can go longer. Our free cleaning frequency tool gives a recommendation for your climate.
What if it rains on the day?
Light rain doesn't stop most washing, but heavy rain, high wind, lightning and freezing temperatures do. If the weather isn't right, we reschedule at no charge. Our work is backed by a satisfaction guarantee.