Quick answer: how to vet a Houston pressure washing company
- Confirm two kinds of insurance before anyone touches your home: general liability (covers damage to your property) and workers’ compensation (covers injury to their crew). In Texas, workers’ comp is optional for private employers, so do not assume it is in place.
- Get three written estimates that list the surfaces, the method (soft wash or high pressure), the cleaning solution, and a completion date. The lowest bid is rarely the safest choice.
- Ask whether they soft wash siding and roofs. High pressure on Hardie board, wood, or shingles is the fastest way to cause damage you will pay to repair.
- Check that they capture or direct wash water properly. Soapy runoff down a storm drain is a pollution problem in Houston, and a careless crew is a sign of how they treat the rest of the job.
- Read reviews with a skeptical eye, and search the company name alongside words like “complaint” or “damage.” For a sense of what a proper pressure washing job involves, look at how the work is described rather than the star rating alone.
Houston homeowner snapshot
Heat and humidity make this a hard market to clean in. Gulf Coast moisture feeds black-green algae (Gloeocapsa magma) on north-facing siding and roofs, and mildew returns on concrete within months. Hurricane season brings a second problem: storm-chasing crews who knock on doors after bad weather, quote a price on the spot, and pressure you to decide fast. Both situations push homeowners toward whoever is cheapest and available, which is exactly when vetting matters most.
What hiring the wrong company actually costs you
A pressure washer is a powerful tool, and a careless operator turns it into an expensive one. Too much pressure strips paint, splinters cedar, forces water behind siding, and etches soft brick and limestone. Fiber cement siding (the Hardie board common on newer Houston homes) and asphalt shingle roofs are both meant to be cleaned with low pressure and detergent, not a 3,000 PSI blast. Once water gets behind a wall or under a shingle, the repair bill dwarfs the cost of the cleaning.
The other hidden cost is liability. Most exterior cleaning involves ladders and two-story rooflines. Falls are not rare in this kind of work. OSHA estimates that slip, trip, and fall hazards on walking and working surfaces cause roughly 202,066 serious injuries and 345 worker deaths every year across the industries its rule covers, a group that explicitly includes window washers [7]. If a worker is hurt on your property and the company carries no workers’ compensation coverage, you can end up named in a claim.
What good looks like is simple to describe and harder to find: a company that matches the method to the surface, protects your plants and your neighbor’s property, carries real insurance, and puts the whole scope in writing before starting.
How to vet a pressure washing company step by step
Work through these checks in order. Each one screens out a category of bad operator.
Verify insurance, and verify it directly. Ask for a Certificate of Insurance (COI) that names both general liability and workers’ compensation. General liability pays if the crew damages your home. Workers’ comp pays if a worker is injured, which keeps that injury from becoming your problem. Here is the Texas wrinkle most homeowners miss: Texas is the only state that lets private employers opt out of workers’ compensation entirely [3]. A company with no coverage is called a non-subscriber, and it is perfectly legal. You can confirm a company’s status yourself through the state’s TXCOMP system, or by emailing the Texas Department of Insurance, which responds with coverage information within one business day [2].
Check the business itself. Texas does not issue a statewide license for pressure washing or exterior cleaning. The Texas Department of Licensing and Regulation licenses trades such as electricians and air conditioning contractors, but house washing is not on that list [8]. That absence of a license is the reason your own vetting carries more weight here. Look for a registered business name, a physical local presence, and a track record longer than one storm season.
Ask how they will clean each surface. This is the question that separates skilled crews from people who own a machine. A good answer distinguishes soft washing (low pressure plus a cleaning solution that kills algae and mildew at the root) from high-pressure washing (reserved for concrete and other hard, non-porous surfaces). Siding, painted wood, and roofs should be soft washed. Driveways and walkways can take real pressure. If someone wants to put a high-pressure tip on your roof or your house washing job, keep looking.
Get the scope in writing. A written estimate should name the areas, the method, the cleaning products, the price, and the completion date. Do not let anyone start work on a verbal quote, and do not pay the full amount up front. The Federal Trade Commission’s advice on home repair is blunt on this point: get it in writing, and do not pay by cash or wire transfer [1].
When is DIY fine? Renting a machine to clean a small concrete patio or a fence is reasonable for a confident homeowner. Anything involving a ladder, a second story, a roof, or detergents on siding is worth hiring out. The injury risk and the cost of a mistake both climb fast above ground level.
What pressure washing costs in Houston and how to compare quotes
Prices vary with the size of the surface, the method, and how badly the buildup has set in. Rather than chase a single number, compare like for like. Ask each company to quote the same scope so the estimates are actually comparable, and treat a bid far below the others as a warning rather than a win. A rock-bottom price usually means one of three things: no insurance, no experience, or corners cut on prep and cleanup.
Time is the other variable. A standard single-story house wash is often a half-day job; a full exterior with driveway, fence, and gutters can run a full day or more. A company that promises to do everything in an hour is either skipping steps or padding the crew in a way that shows up in the price.
A proper soft wash kills algae at the root, so it stays clean longer than a high-pressure rinse that only knocks off the surface growth. That means you clean less often, which is the real value behind the price.
Common hiring mistakes Houston homeowners make
- Choosing on price alone. The cheapest quote often hides missing insurance or a plan to use too much pressure. Fix: weigh the written scope and insurance, rather than the dollar figure alone.
- Skipping the insurance check. Homeowners assume every company carries workers’ comp. In Texas, many do not. Fix: ask for the COI and verify it.
- Saying yes to a door knocker after a storm. High-pressure, decide-now sales pitches are a classic home-repair red flag. Fix: get other quotes first [1].
- Letting a crew put high pressure on siding or the roof. This causes the exact damage you were trying to prevent. Fix: confirm they soft wash these surfaces.
- Ignoring where the water goes. Soapy wash water that runs into a storm drain heads straight to Houston’s bayous and Galveston Bay untreated. A crew that does not manage runoff is cutting corners you cannot see.
How professional crews approach the job
Experienced operators think in terms of surface, solution, and pressure, in that order. They identify what they are cleaning, choose a detergent matched to the stain, and use the least pressure that will do the work. For algae and mildew on siding and roofs, that means a soft wash: the cleaning agent does the job, and water at house-pressure rinses it away. High pressure comes out for concrete driveway cleaning and other hard surfaces, often with a flat surface cleaner that gives an even finish without the wand stripes left by amateurs.
Professionals also plan for the water after it hits the ground. University environmental health and safety guidance is consistent on this: wash water from outdoor cleaning, especially when detergents are involved, should not flow freely into the storm sewer, because that system carries it untreated to local waterways [6]. The University of Kentucky’s guidance recommends water-only methods outdoors where possible and directing wash water to a sanitary sewer or an approved control rather than a storm drain [5]. The EPA’s stormwater guidance gives the same instruction: do not discharge wash water to a storm drain or surface water [4]. A careful crew protects landscaping, pre-wets and covers plants, and keeps cleaning solution out of the gutter. How a company handles the invisible part of the job tells you how it handles the rest.
Key takeaways
- Insurance is the single most important check, and in Texas you cannot assume workers’ comp exists. Verify both liability and workers’ comp before work starts.
- Match the method to the surface. Soft washing protects siding and roofs; high pressure belongs on concrete.
- A written scope with method, products, price, and date is your protection against a job that goes sideways.
- Storm-season door knockers and rock-bottom prices are the two most reliable warning signs in this market.
- How a crew manages wash-water runoff is a quiet but telling measure of how carefully it works [4][6].
FAQ
Should a pressure washing company be licensed and insured in Texas?
Texas does not require a state license specifically for pressure washing, so “licensed” means less here than in some trades [8]. Insurance is the real test. Ask for proof of general liability and workers’ compensation, since workers’ comp is optional for private Texas employers and many companies skip it [3].
How do I check whether a pressure washing company has workers’ comp?
Ask for a Certificate of Insurance, then verify it independently. The Texas Department of Insurance lets you confirm coverage through its TXCOMP system, or you can email the department with the company name and address and get an answer within one business day [2].
Is soft washing better than pressure washing for my home?
For siding, painted wood, and roofs, yes. Soft washing uses low pressure and a cleaning solution that kills algae and mildew, which avoids the water intrusion and surface damage that high pressure can cause on these materials. High pressure is appropriate for concrete and other hard surfaces.
Can a pressure washing company damage my house?
Yes. Too much pressure can strip paint, gouge wood, crack older mortar, and drive water behind siding or under shingles. This is why the method matters and why a company that carries liability insurance protects you if something goes wrong.
Who is liable if a worker is injured cleaning my home?
If the company carries workers’ compensation, that coverage handles the injury. If it is a non-subscriber with no coverage, an injured worker may have grounds to pursue the homeowner, which is why verifying workers’ comp is worth the few minutes it takes.
What are the biggest red flags when hiring?
A pitch right after a storm with pressure to decide now, a quote far below everyone else, no written scope, a refusal to show insurance, and a plan to use high pressure on siding or roofs.
References
- Federal Trade Commission, Home Repair Scams. https://consumer.ftc.gov/features/pass-it-on/home-repair-scams
- Texas Department of Insurance, Workers’ compensation insurance coverage verification. https://www.tdi.texas.gov/wc/employer/coverage.html
- Texas Department of Insurance, Are employers required to have workers’ compensation insurance in Texas? https://www.tdi.texas.gov/news/2023/dwc03202023.html
- U.S. Environmental Protection Agency, Industrial Stormwater Fact Sheet Series (Sector K). https://www.epa.gov/sites/default/files/2015-10/documents/sector_k_hazwaste.pdf
- University of Kentucky, Department of Environmental Health and Safety, Pressure Washers (Fact Sheet 8.8). https://ehs.uky.edu/docs/pdf/env_eph_08.08%20Pressure%20Washers.pdf
- University of Michigan, Environment, Health & Safety, Exterior Cleaning and Powerwashing. https://ehs.umich.edu/wp-content/uploads/2016/08/EP-W-PW-Exter-Cleaning-Power-Wash.pdf
- U.S. Occupational Safety and Health Administration, Walking-Working Surfaces and Personal Fall Protection Systems (Fact Sheet). https://www.osha.gov/sites/default/files/publications/OSHA3903.pdf
- Texas Department of Licensing and Regulation, regulated industries and programs. https://www.tdlr.texas.gov/
