When we handle exterior mold & mildew removal for composite decking in Kimberly, WI, 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. With composite decking, the right approach is low-pressure wash.
Method and pressure
Cleaning solution: A composite deck cleaner recommended by the decking maker.
What to know about cleaning composite decking
Composite decking doesn't need staining, but it does grow mold and mildew, especially in shade and between boards. Most manufacturers recommend gentle cleaning, and some limit the pressure that can be used without affecting the warranty.
Avoid: High pressure and narrow tips, which can scar the surface and may void the warranty.
How often: Every year, more often in shade.
When to book exterior mold & mildew removal for composite decking
- 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.
Why more pressure isn’t better
- 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
- Identify surfaces and growth
- Protect plants and fixtures
- Apply a solution that kills the growth
- Rinse at low pressure
- 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.
How much does exterior mold & mildew removal for composite decking 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 composite decking
Serving Kimberly, WI and nearby towns
In Wisconsin, snow and slush that sit against the house leave a band of grime and mildew along the lower siding, and shaded north walls stay damp long after the thaw. A spring soft wash removes winter grime before it bakes on over the summer.
Much of Wisconsin 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.
Crews serve all of Kimberly (ZIP code 54136), plus Little Chute (1.2 mi), Combined Locks (1.3 mi), Harrison (3.1 mi) and Kaukauna (3.3 mi). Call (555) 010-0000 for a free quote in Kimberly.
Exterior Mold & Mildew Removal for Composite Decking: frequently asked questions
How much does exterior mold & mildew removal for composite decking cost in Kimberly, WI?
Exterior Mold & Mildew Removal for Composite Decking 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 composite decking?
For composite decking: low pressure, often under 1,500 PSI with a wide fan tip, held well back; check your decking brand's care guide. What we avoid: high pressure and narrow tips, which can scar the surface and may void the warranty. The cleaning solution does most of the work, followed by a gentle rinse.
Is exterior mold & mildew removal for composite decking 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 composite decking?
Every year, more often in shade. 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.