The secret to pre-paint washing for fiber cement siding is using the right method, not the most pressure. In Illinois, we match the cleaner and pressure to the surface so it comes out clean without damage. For fiber cement siding, that means soft wash.
How we clean it
Cleaning solution: A mild detergent or diluted house-wash solution, rinsed with low-pressure water.
What to know about cleaning fiber cement siding
Fiber cement siding is durable and holds paint well, but its factory finish can be marked by high pressure, and manufacturers' care guides generally recommend low-pressure cleaning. Check your siding's care instructions if it is still under warranty.
Avoid: High pressure and close-range spraying, which can damage the finish and void the finish warranty.
How often: Every 1-2 years.
Is it time for pre-paint washing for fiber cement siding?
- You're about to paint or stain the house
- Chalky residue comes off on your hand
- Mildew or dirt under the old paint
What causes the dirt and stains
- 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.
Why more pressure isn’t better
- Painting over mildew, which bleeds through
- Too much pressure that damages wood or drives water into the wall
- Painting before the wood is dry
Our process for pre-paint washing for fiber cement 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
Typical pre-paint washing for fiber cement siding 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 fiber cement siding
- Soft Washing for Fiber Cement Siding
- House Washing for Fiber Cement Siding
- Exterior Mold & Mildew Removal for Fiber Cement Siding
Serving Illinois and nearby towns
Humid summers in Illinois grow green algae and black mildew on the shaded sides of homes, especially on vinyl and painted wood. A soft wash kills the growth rather than just knocking it off, so the siding stays clean longer.
We cover 507 cities and towns across Illinois. Find pre-paint washing for fiber cement siding in your city:
Pre-Paint Washing for Fiber Cement Siding: frequently asked questions
How much does pre-paint washing for fiber cement siding cost in Illinois?
Pre-Paint Washing for Fiber Cement 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 fiber cement siding?
For fiber cement siding: soft wash, typically under 500 PSI; most manufacturers advise against high-pressure washing. What we avoid: high pressure and close-range spraying, which can damage the finish and void the finish warranty. The cleaning solution does most of the work, followed by a gentle rinse.
Is pre-paint washing for fiber cement 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 fiber cement siding?
Every 1-2 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.