Hardie · Fiber Cement · Texture-Safe Soft-Wash
Hardie Board Soft-Wash, Without Damaging The Texture.
The Gold Standard, Every Time.
James Hardie's published care guide is unambiguous: low-pressure cleaning only, sodium hypochlorite chemistry approved, never high-pressure. We follow that guide to the letter — texture, paint adhesion, and the warranty stay intact.
Why Hardie Needs Its Own Protocol
Texture is the value. Texture is also fragile.
James Hardie's fiber-cement plank derives its premium look from a baked-in, factory-applied texture — woodgrain, stucco, or smooth — paired with a ColorPlus or post-installation paint system. That texture is what separates a Hardie home from a vinyl-sided build. The texture is also what high-pressure washing destroys. A 3,000 PSI tip held too close, even for a second, lifts paint, gouges grain, and leaves visible "stripes" that no re-paint perfectly hides. We see those stripes on Northeast Florida homes whose owners hired the cheapest pressure-washer in the area.
James Hardie's published Care & Maintenance guide directs cleaning by garden hose with mild detergent, or low-pressure soft-wash with sodium hypochlorite. That is the protocol our trained exterior discipline uses on every Hardie home — pressure capped at 200 PSI, hypo at 0.5–1.5% solution depending on bloom severity, and a fresh-water neutral rinse at close.
FCPE Hardie Soft-Wash Protocol
- Pressure capped at 200 PSI — manufacturer-approved range
- Sodium hypochlorite at 0.5–1.5% with surfactant for dwell
- 5–8 minute dwell — chemistry kills the bloom, not the rinse
- Neutral fresh-water rinse, never high-pressure
- Texture preserved, paint adhesion preserved, warranty intact
- Re-treat interval typically 18–24 months
High-Pressure on Hardie (Common Damage)
- 3,000+ PSI lifts ColorPlus paint and bare cement underneath
- Gouge marks parallel to the wand stroke — "zebra stripes"
- Texture flattening visible under raking light
- Caulk lines blown out at corners and J-channel
- Water forced behind plank into rain-screen cavity
- Warranty claim denied by James Hardie on inspection
What We Treat
Common Hardie issues across Northeast Florida.
Mildew Bloom on North Walls
Shaded north and east-facing Hardie walls under oak canopy bloom green-black within 12 months. Hypo chemistry kills it at the cellular level — far longer-lasting than a pressure rinse.
Salt-Air Haze (Coastal)
Coastal Hardie homes from Vilano Beach to Atlantic Beach pick up sodium chloride film that dulls the ColorPlus finish. We rinse to chloride-neutral on every coastal job.
Sprinkler Mineral Spotting
Irrigation overspray hits ground-level Hardie courses with hard-water minerals. Calcium spots that pressure-wash can't lift come off with a controlled descaling pass.
Pricing
A Hardie soft-wash is a house soft-wash.
Hardie soft-wash is priced under our House Soft-Wash bracket — exterior square-footage based, $295–$725 a-la-carte for most Northeast Florida homes, ~15% less on the annual exterior plan. The substrate (Hardie vs. stucco vs. vinyl) doesn't change the price; the chemistry, dwell, and rinse are calibrated to substrate but the labor and equipment are the same.
Common Questions
What Hardie homeowners ask first.
Will this void my James Hardie warranty?
No. Soft-wash with sodium hypochlorite at low pressure is the method James Hardie's Care & Maintenance guide directs. We document the chemistry and pressure on the job ticket. Warranty stays intact.
My Hardie was painted after install — is it different?
Slightly. Field-painted Hardie has thinner, less-baked paint than factory ColorPlus, so we drop hypo concentration toward the lower end of the range and shorten dwell. Same protocol, calibrated for the paint.
How often does Hardie need cleaning?
Most Northeast Florida Hardie homes do well with one wash per year — March, before the summer bloom. Heavily-shaded or coastal homes trend toward twice-yearly. Annual exterior plan handles the cadence automatically.
Can pressure-washing ever damage Hardie?
Yes — and it's the most common Hardie complaint we see. Texture loss is permanent. If your Hardie was previously pressure-washed and shows stripe marks under raking light, we can soft-wash to restore the surface, but the texture itself doesn't grow back.
Ready When You Are
Keep your Hardie warranty, your texture, and your color.
The Gold Standard, Every Time.