Exterior Mold & Mildew Removal for Pressure-Treated Wood is one of the jobs we do most often in Huntsville, AL. Typical jobs cost $250-$700, and you approve the price before we begin. With pressure-treated wood, the right approach is low-pressure wash.
How we clean it
Cleaning solution: An oxygen-based or sodium percarbonate wood cleaner, then an oxalic acid brightener.
What to know about cleaning pressure-treated wood
Pressure-treated pine is the most common deck and fence wood. It grays, mildews and gets slippery when wet. A wood cleaner does most of the work, and a brightener afterward restores the wood's color and helps new stain soak in.
Avoid: High pressure and narrow tips, which leave furry, gouged boards and lap marks.
How often: Clean yearly; restain every 2-3 years.
Signs you need exterior mold & mildew removal for pressure-treated wood
- 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.
Common mistakes to avoid
- Blasting growth off without killing it, so it grows back fast
- Mixing cleaning chemicals, which can release toxic gas
- Damaging plants with runoff
Our process for exterior mold & mildew removal for pressure-treated wood
- 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.
Typical exterior mold & mildew removal for pressure-treated wood prices
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 pressure-treated wood
- Pressure Washing for Pressure-Treated Wood
- Deck Cleaning for Pressure-Treated Wood
- Deck Restoration & Staining for Pressure-Treated Wood
- Fence Cleaning for Pressure-Treated Wood
Serving Huntsville, AL and nearby towns
Mildew and algae are the main reason Alabama homeowners wash their siding. Shaded walls can turn green within months, and pressure alone doesn't kill the growth, so we use a soft wash solution that does.
Parts of Alabama are exposed to hurricanes and tropical storms. After a storm, washing removes mud, debris and salt spray from siding, screens and walkways. Check for damage first: loose siding, broken screens and roof damage need repair before anyone washes them.
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.
Spring pollen season in Alabama coats houses, cars, screens and patios in a yellow-green film, and pollen gives mildew something to feed on. Many homeowners book their wash after pollen season ends so the house stays clean longer.
Red clay soil is common in parts of Alabama. Rain splashes it onto the bottom of the siding, walls and walkways, and its iron-rich color can stain light surfaces. It usually needs a dedicated clay or rust cleaner rather than pressure alone.
We provide exterior mold & mildew removal for pressure-treated wood across Huntsville (ZIP codes 35801, 35802, 35803, 35804, 35805 and more) and nearby towns including Meridianville (8.4 mi), Moores Mill (8.7 mi), Madison (9.5 mi) and Harvest (12.7 mi). Call (555) 010-0000 for a free quote in Huntsville.
Exterior Mold & Mildew Removal for Pressure-Treated Wood: frequently asked questions
How much does exterior mold & mildew removal for pressure-treated wood cost in Huntsville, AL?
Exterior Mold & Mildew Removal for Pressure-Treated Wood 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 pressure-treated wood?
For pressure-treated wood: usually 500-1,200 PSI with a wide fan tip. What we avoid: high pressure and narrow tips, which leave furry, gouged boards and lap marks. The cleaning solution does most of the work, followed by a gentle rinse.
Is exterior mold & mildew removal for pressure-treated wood 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 pressure-treated wood?
Clean yearly; restain every 2-3 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.