Safe & Professional
Expert House Washing Near Me
Soft-wash cleaning that revives curb appeal in a single afternoon

Soft-wash cleaning that revives curb appeal in a single afternoon
Ever catch yourself squinting at your siding because it used to be three shades brighter? You’re not alone. The Kelso–Longview area’s damp winters and pollen‑heavy springs are kind to moss, mildew, and road film—but not to paint and vinyl. Prep Pros is a professional house washing company in Kelso WA, that will restore that eye‑catching curb appeal with a house washing service that’s as gentle on surfaces as tough on grime.
Why Homeowners All Over Cowlitz County Trust Prep Pros
Soft‑Wash Specialists – We skip the blast-and-pray approach. Our low-pressure soft-wash applies a specialized house-wash solution that breaks down mold, mildew, and grime on contact—without driving water behind your siding—and then becomes neutralized as it rinses away.
Local, Owner‑Operated – Prep Pros is a Kelso/Longview small business, and you’ll see my name—Phillip Garcia—on every quote and work order.
Eco‑Smart Practice – Rinsed runoff is neutralized before it leaves your flowerbeds, keeping the Columbia and Kalama Rivers free of unnecessary chemicals.
Transparent Pricing – Upfront, written estimates, and no surprise add‑ons at invoice time.
What We Remove
Green algae film
Slimy siding, dark vertical streaks
Black mildew dots
Blotchy, peppered look on paint or vinyl
Cobwebs & insect nests
Hard‑to‑reach soffits and eaves
Urban fallout
Gray haze from highway & mill traffic

Our Proven 4-Step House-Washing Process
Give your home the curb-appeal boost it deserves. Prep Pros’ low-pressure soft-wash safely removes mold, mildew, and grime with a professional-grade house wash cleaning blend, restoring your siding’s original color in a single visit—no streaks, no damage, just a house that looks freshly painted.
The process
01
Pre-Wash Inspection & Prep
We walk the property with you, note problem areas (mold, algae, oxidation), and gently cover or move items like plants, decor, furniture, and electric fixtures.
02
Targeted House Wash Application
Using low-pressure equipment, we apply a precise mix of professional-grade house wash and surfactant to siding, soffits, and trim.
03
Controlled Soft-Rinse
After the dwell time, we rinse with low pressure—just enough to flush away dead growth and detergent without driving water where it shouldn’t go.
04
Final Walk-Through & Spot Treatment
We do a joint inspection, re-treat any stubborn spots, and tidy up hoses and tarps before we leave.
The entire visit for an average 2,000‑sq‑ft rambler runs roughly 90 minutes, so your evening routine stays on schedule.
Optional Add‑Ons
Gutter whitening
Exterior window cleaning
Driveway or patio surface wash
Deck soft wash & brightening
Bundle two or more and save 10%—ask for our multi‑service discount when you call.
House-Washing FAQ
Straight answers to the most common questions about Prep Pros’ gentle, low-pressure soft-wash service.
Still have questions?
Drop us a note or call, and the Prep Pros team will be happy to help.
Read more here – The Ultimate Guide to House Washing
Soft washing uses very low pressure (typically 150-300 PSI) plus a cleaning blend to break down organics; pressure washing relies on 1,300 PSI + to blast soils away. Soft wash is safe for siding, trim, and other delicate surfaces, while high pressure is best reserved for hardscape.
Plan on a thorough exterior wash about once a year. Homes under trees, near the ocean, or in humid climates may need a touch-up every 6–12 months to keep algae and mold from staining.
Not when applied correctly. We pre-wet and, if needed, cover landscaping, keep pets indoors, and rinse everything down after the job. Industry guidance shows that professional soft washing is plant-safe when those precautions are followed.
No—low pressure prevents water from being forced behind panels, and the solution lifts grime instead of scouring it. In contrast, misused high-pressure spray can dent aluminum or strip paint and caulk.
No. Just close windows, clear the driveway, and ensure an outdoor water spigot is on—we’ll handle the rest and text you before we leave.
A standard 2-story home usually takes 2–4 hours, depending on square footage and soil level. Extra-large homes or heavy buildup can extend the visit.
Light rain is no problem; the cloud cover can actually help the solution dwell longer. We only reschedule for downpours, high winds, or lightning.
Expect that “just-washed” look to hold six months to a year—or longer—because the cleaning blend leaves a micro-residue that slows algae regrowth. Heavy shade, pollen, or coastal salt can shorten that cycle.