The secret to exterior mold & mildew removal for pressure-treated wood is using the right method, not the most pressure. In New Mexico, we match the cleaner and pressure to the surface so it comes out clean without damage. On pressure-treated wood, the method we use is low-pressure wash.
The right method for the job
Cleaning solution: An oxygen-based or sodium percarbonate wood cleaner, then an oxalic acid brightener.
Caring for 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.
When to book 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
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.
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 New Mexico and nearby towns
In New Mexico, siding and stucco get dull from dust and spotted from sprinkler overspray more than from mildew. Hard-water spots need a different treatment than dirt, so we identify the stain before choosing the cleaner.
Much of New Mexico 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 New Mexico 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 82 cities and towns across New Mexico. Find exterior mold & mildew removal for pressure-treated wood in your city:
- Albuquerque
- Las Cruces
- Enchanted Hills
- Rio Rancho
- Santa Fe
- Roswell
- Farmington
- South Valley
- Clovis
- Hobbs
- Alamogordo
- Carlsbad
Exterior Mold & Mildew Removal for Pressure-Treated Wood: frequently asked questions
How much does exterior mold & mildew removal for pressure-treated wood cost in New Mexico?
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.