The secret to soft washing for stucco is using the right method, not the most pressure. In Arnold, MO, we match the cleaner and pressure to the surface so it comes out clean without damage. On stucco, the method we use is soft wash.
How we clean it
Cleaning solution: A diluted house-wash solution with surfactant, given time to dwell, then a gentle rinse.
Caring for stucco
Traditional stucco is porous and holds moisture, which is why it streaks green and black in humid and shaded spots. Hairline cracks are common, and high pressure can force water into them or break off the finish coat.
Avoid: High pressure, which can etch the texture, blow out patches and push water behind the wall.
How often: Every 1-2 years.
Signs you need soft washing for stucco
- 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
Where the grime comes from
- 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
Safe steps for homeowners
- 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.
What can go wrong with DIY pressure washing
- 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 stucco
- 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 stucco 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 stucco
- House Washing for Stucco
- Rust Stain Removal for Stucco
- Graffiti Removal for Stucco
- Exterior Mold & Mildew Removal for Stucco
- Pre-Paint Washing for Stucco
- Commercial Pressure Washing for Stucco
- HOA & Apartment Pressure Washing for Stucco
Local soft washing for stucco for Arnold, MO
Humid summers in Missouri grow green algae and black mildew on the shaded sides of homes, especially on vinyl and painted wood. A soft wash kills the growth rather than just knocking it off, so the siding stays clean longer.
Crews serve all of Arnold (ZIP code 63010), plus Imperial (4.4 mi), Oakville (4.7 mi), Mehlville (6 mi) and Barnhart (6.2 mi). Call (877) 658-5887 for a free quote in Arnold.
Soft Washing for Stucco: frequently asked questions
How much does soft washing for stucco cost in Arnold, MO?
Soft Washing for Stucco 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 (877) 658-5887 for a free quote.
Do you use high pressure for soft washing for stucco?
For stucco: soft wash only, typically under 500 PSI. What we avoid: high pressure, which can etch the texture, blow out patches and push water behind the wall. The cleaning solution does most of the work, followed by a gentle rinse.
Is soft washing for stucco 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 stucco?
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.