Most pressure washing operators are honest, careful, and know what they're doing. The minority that aren't can do real damage — stripped paint, cracked siding, killed landscaping, vehicles damaged by overspray. Here are the 11 red flags that say "find someone else."
1. Quote much below market
National range for a 2-car driveway: $150–$300. House siding: $300–$600. If someone's quoting $50 for a full house wash, the math doesn't work — they're either uninsured, using illegal labor, or both. The risk shifts to you when something breaks.
2. No insurance certificate available
Real operators carry $1M general liability. Cost: $500–$1,200/year — built into normal pricing. If they can't email you a certificate, they don't have one. Walk away.
3. Cash-only / cash up front
A demand for cash before starting work is a fraud signal. Reputable operators take cards, ACH, Venmo, or check — and either don't take a deposit on small residential jobs OR clearly state the deposit is "for materials, balance due on completion." Cash up front + start tomorrow = scam pattern.
4. No business name or LLC
"Just text me at this number" with no business name, no website, no LLC = no legal recourse if something goes wrong. Find someone with a real business presence.
5. Won't give you a written quote
Verbal "around 300" with no follow-up text/email is a warning. Quotes should be in writing — text or email — with the scope, the price, and what's included.
6. Pressure washes vinyl siding with high pressure
Vinyl siding ALWAYS gets soft wash (low pressure + chemical). High pressure on vinyl strips paint, forces water behind panels (mold), and dents the panels. If an operator says they'll "just blast it," they don't know what they're doing — siding damage is permanent and expensive.
7. Doesn't pre-wet plants before chemical work
Sodium hypochlorite (the active in soft wash) kills landscaping if not pre-soaked + rinsed. A pro saturates plants with fresh water before, during, and after. If they skip this, expect dead shrubs in 1–2 weeks.
8. Vague service area
"I service all of New England" from a single-truck operator is suspicious. Pros have tight service zones (their town + adjacent towns) because driving 90 minutes one-way isn't profitable. A wide service area means they're chasing every job, not running a real business.
9. No photos of recent work
Every working pro has a phone full of before/after pictures. If they can't text you 3-5 examples, they either don't have the experience they claim or they don't care about their portfolio. Either way: pass.
10. Too-good-to-be-true reviews
10 reviews all posted within 2 days, all 5-star, all using similar language = bought reviews. Real reviews trickle in over months and include occasional 4-star "good but..." mixed with the 5-stars. Dig past the average rating into the review timeline.
11. High-pressure sales tactics
"This price is only good if you book today." "I've got an opening tomorrow if you commit now." Real pros are booked 1–2 weeks out in peak season and don't need to pressure customers. Urgency selling = inexperience or scam.
One soft red flag (not always disqualifying)
Brand new business with no reviews: not automatic disqualifier. Everyone starts somewhere. But pair "new business + no reviews + insurance cert + clear written quote" — that's a viable new operator. "New business + no insurance + cash only + verbal quote" is a different story.
The walk-away script
If a red flag comes up: "Thanks, I appreciate the quote — I'm going to think it over and get back to you." That's it. Don't argue, don't negotiate, don't try to fix the issue. Move to the next operator.
The bottom line
11 red flags, 5 minutes on the phone to check them. The 95% of pressure washing operators who pass these are great to hire. The 5% who fail are the source of every horror story. Self-protect upfront and the trade is one of the best home-services experiences you'll have.
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