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Exterior Mold & Mildew Removal for Concrete in Your Area

Pressure wash with a surface cleaner for concrete. Killing and removing mold, mildew and algae from siding, decks, walkways and fences, with treatment that slows regrowth. Typical cost $250-$700.

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Exterior Mold & Mildew Removal for Concrete is one of the jobs we do most often in your area. Typical jobs cost $250-$700, and you approve the price before we begin. For concrete, that means pressure wash with a surface cleaner.

How we clean it

Pressure wash with a surface cleanerCleaning method
Usually 2,500-3,500 PSI with a rotary surface cleaner for even resultsPressure

Cleaning solution: A degreaser for oil spots and a pre-treatment for organic growth; post-treatment slows regrowth.

What to know about cleaning concrete

Plain broom-finish concrete is the surface pressure washing is made for. A rotary surface cleaner gives an even finish without the stripes a wand leaves, and hot water helps with grease and oil.

Avoid: Holding a narrow tip close to the surface, which etches lines into the cream layer of the concrete.

How often: Every year, or every 6 months in shaded, damp spots.

Signs you need exterior mold & mildew removal for concrete

  • Black, green or gray spots and film
  • Slippery walkways and decks
  • Musty smell near shaded walls
  • Growth that returns soon after rinsing

Where the grime comes from

  • Shade, humidity and poor air flow
  • Organic debris and pollen
  • Surfaces that stay damp after rain or sprinklers

Safe steps for homeowners

  • Improve sun and air flow by trimming plants
  • Keep gutters and sprinklers from soaking walls
  • Clean small areas with an outdoor mildew cleaner, following the label

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

  • Blasting growth off without killing it, so it grows back fast
  • Mixing cleaning chemicals, which can release toxic gas
  • Damaging plants with runoff

What happens on the day

  1. Identify surfaces and growth
  2. Protect plants and fixtures
  3. Apply a solution that kills the growth
  4. Rinse at low pressure
  5. Post-treat where helpful to slow regrowth

This service is for outdoor surfaces. Mold inside the home, in attics or in wall cavities needs a mold remediation specialist, not a pressure washing company.

Exterior Mold & Mildew Removal for Concrete cost in your area

$250-$700Typical range for typical exterior growth on a home
2-4 hoursTypical time on site
Every 1-2 years in humid or shaded areasRecommended frequency

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 concrete

Exterior Mold & Mildew Removal for Concrete in your area

We provide exterior mold & mildew removal for concrete across all 50 states, Washington, DC and Puerto Rico. Pick your state to see local details:

Exterior Mold & Mildew Removal for Concrete: frequently asked questions

How much does exterior mold & mildew removal for concrete cost?

Exterior Mold & Mildew Removal for Concrete typically costs $250-$700 for typical exterior growth on a home, 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 exterior mold & mildew removal for concrete?

For concrete: usually 2,500-3,500 PSI with a rotary surface cleaner for even results. What we avoid: holding a narrow tip close to the surface, which etches lines into the cream layer of the concrete. We keep the pressure even and controlled, with the right tools for the surface.

Is exterior mold & mildew removal for concrete 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 exterior mold & mildew removal for concrete?

Every year, or every 6 months in shaded, damp spots. 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.

More services

Popular Exterior Cleaning Services in Your Area

Pressure Washing for Stamped Concrete

Moderate-pressure wash. Stamped and colored concrete is usually protected by a sealer.

Typical $150-$600

Rust Stain Removal for Brick

Low-pressure wash. Brick is tough, but the mortar joints are softer than the brick itself, and older soft-fired brick can pit.

Typical $150-$500

Deck Cleaning for Cedar

Low-pressure wash. Cedar decks and fences turn silver-gray as the surface weathers.

Typical $250-$600

Sidewalk & Walkway Cleaning for Exposed Aggregate

Moderate-pressure wash. Exposed aggregate concrete has stones showing at the surface.

Typical $100-$250

Pre-Paint Washing for Wood Siding

Soft wash. Painted and stained wood siding grows mildew and loses its finish faster on the shaded and weather-facing sides.

Typical $250-$600

Commercial Pressure Washing

Building washing and flatwork cleaning for offices, retail, restaurants, warehouses and other commercial properties, scheduled around your hours.

Typical $400-$2,000

Pressure Washing

High-pressure cleaning for driveways, walkways, patios, pool decks and other hard surfaces, with the pressure matched to each surface.

Typical $150-$600

Concrete Sealing

Concrete cleaning and sealing that helps resist stains, water and freeze-thaw damage on driveways, patios and stamped concrete.

Typical $400-$1,200

Paver Cleaning & Sealing for Brick

Low-pressure wash. Brick is tough, but the mortar joints are softer than the brick itself, and older soft-fired brick can pit.

Typical $600-$1,800

Pressure Washing for Flagstone

Low-to-moderate pressure wash. Flagstone covers several stones, including sandstone, slate, bluestone and limestone, and they react differently to pressure and chemicals.

Typical $150-$600

Fence Cleaning for Cedar

Low-pressure wash. Cedar decks and fences turn silver-gray as the surface weathers.

Typical $200-$600

Pool Deck Cleaning for Stamped Concrete

Moderate-pressure wash. Stamped and colored concrete is usually protected by a sealer.

Typical $200-$500

Ready for a cleaner home or business?

Get a free pressure washing quote near you. Tell us what needs cleaning and we'll give you a price and the next available date.

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