The secret to pre-paint washing for wood siding is using the right method, not the most pressure. In Colorado, we match the cleaner and pressure to the surface so it comes out clean without damage. With wood siding, the right approach is soft wash.
The right method for the job
Cleaning solution: A mild house-wash mix; an oxygen-based cleaner when the wood will be stained.
Caring for wood siding
Painted and stained wood siding grows mildew and loses its finish faster on the shaded and weather-facing sides. A soft wash cleans it without raising the grain, and is the usual first step before repainting or restaining.
Avoid: High pressure that raises fibers, gouges the wood or strips sound paint unevenly.
How often: Every 1-2 years, and before every repaint.
Is it time for pre-paint washing for wood siding?
- You're about to paint or stain the house
- Chalky residue comes off on your hand
- Mildew or dirt under the old paint
Where the grime comes from
- Paint chalking as it ages
- Mildew that will grow through new paint if not killed
- Dirt that weakens adhesion
What you can do yourself
- Ask your painter what prep they need
- Allow siding to dry for the time the paint maker recommends before painting
Not sure what you're looking at? The free stain identifier and safe pressure guide explain each stain and surface.
Common mistakes to avoid
- Painting over mildew, which bleeds through
- Too much pressure that damages wood or drives water into the wall
- Painting before the wood is dry
How we handle pre-paint washing for wood siding
- Coordinate with your painter
- Protect plants and fixtures
- Kill mildew and wash the surface
- Remove loose chalk and dirt
- Leave the house to dry before painting
How much does pre-paint washing for wood siding 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 wood siding
- Soft Washing for Wood Siding
- House Washing for Wood Siding
- Exterior Mold & Mildew Removal for Wood Siding
Pre-Paint Washing for Wood Siding in Colorado
In Colorado, strong sun fades siding and paint, and winter grime builds up along the bottom of walls. A gentle spring wash removes it without stripping a finish that the sun has already weakened.
Much of Colorado 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 Colorado 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 159 cities and towns across Colorado. Find pre-paint washing for wood siding in your city:
- Denver
- Colorado Springs
- Aurora
- Fort Collins
- Lakewood
- Thornton
- Westminster
- Arvada
- Centennial
- Pueblo
- Greeley
- Boulder
Pre-Paint Washing for Wood Siding: frequently asked questions
How much does pre-paint washing for wood siding cost in Colorado?
Pre-Paint Washing for Wood Siding typically costs $250-$600 for a typical home exterior, and usually takes 2-4 hours plus dry time. 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 pre-paint washing for wood siding?
For wood siding: soft wash, typically under 500 PSI; up to about 1,000 PSI with a wide tip for bare wood prep. What we avoid: high pressure that raises fibers, gouges the wood or strips sound paint unevenly. The cleaning solution does most of the work, followed by a gentle rinse.
Is pre-paint washing for wood siding 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 pre-paint washing for wood siding?
Every 1-2 years, and before every repaint. 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.