You walk outside after a wash and see stones showing in the driveway, fuzzy deck boards or a fogged window. The crew says it was already like that. To avoid problems in the first place, see our guide to pressure washing mistakes homeowners make.

Start with the pattern, not the surface

Ask two questions first. When did it appear? Damage you saw within hours of the wash is a stronger case than something you noticed a month later. What shape is it? A wand moves in strokes, so it is worth checking whether the damage lines up with them: stripes, arcs or a patch where someone may have lingered. In one community thread about a torn screen panel, the homeowner pointed to a back-and-forth pattern in the tear as the giveaway.

Older damage tends to be even across a whole surface, worst on the sunniest or wettest side, and present where the crew never sprayed. Oxidized, chalky vinyl is a common case: see why a wash can make oxidation look worse.

A quick guide by surface

What you see Could point to the wash Could have been there already Who says so
Driveway stones showing Lines or patches matching the spray Scaling from salt and de-icers; some finishes expose stones on purpose Tarion construction guide
Fuzzy, splintered or etched deck wood Narrow tip or too much pressure Older, softer wood damages more easily Treatedwood.com (Deck Medic); Sherwin-Williams; Simpson
Blotchy, chalky vinyl siding Chalk washed off unevenly Chalking and oxidation from normal weathering CertainTeed warranty and care text
Peeling paint Spray knocked off weak paint Moisture under the paint film loosened it first Sherwin-Williams
Fog between window panes Not among the causes that maker lists for fogging Seal failure from age, wear and temperature swings Centra Windows
New water stains inside a wall Spray aimed up behind siding An older leak, if stains predate the wash Ply Gem care guide

Concrete. A new-home warranty program’s construction guide says scaling of outdoor concrete most often comes from salts and de-icers. It also notes that some finishes deliberately expose the stones, which is not damage at all. In one community thread, a homeowner asked whether a professional wash stripped the top layer of a driveway or whether the surface was poor from the start. If the wear is the same at the edges, age and weather are the likelier story.

Wood decks. A deck professional’s guidance warns that too much pressure can cause etching, splintering and fuzzing, and suggests fan tips of at least 30 degrees and no more than 800 psi. A deck stain maker gives 1,200 to 1,400 psi with a 45-degree tip, sprayed with the grain. A pressure washer maker, describing an older deck, notes the wood is much softer and needs a wider nozzle. So on an old deck, the answer is often a bit of both.

Vinyl siding. One vinyl siding maker’s warranty excludes “normal weathering, fading, chalking or oxidation”. Its care text says chalk comes off with a garden hose and soapy water. That’s why a wash can make chalky siding look worse: it removes chalk unevenly and reveals the faded color underneath. For more on chalky paint, see our guide to Louisiana heat and humidity and house exteriors.

Paint. A paint maker explains that peeling happens when a wet surface swells and the paint film loosens and cracks. Worn caulk and clogged gutters are common ways water gets in. If paint came off only in bands where the wand passed, the wash played a part. If the bare spots sit near joints, gutters or other wet areas, the paint was likely already failing.

Windows and water inside. A window maker says moisture between the panes typically means the seal has failed, and lists age, wear and temperature swings among the causes. A siding maker warns that aiming a washer upward can push water behind the siding and cause leaks, streaks and decay.

Photos to take before any wash

Before photos settle most of these arguments, so take them before the crew arrives:

  • Each side of the house, close enough to see the surface.
  • The driveway, deck boards and any painted trim, including problem spots.
  • Every window, plus screens and outdoor lights.
  • Inside walls under windows on the sides being washed.

Our list of questions to ask a house washing company covers what to settle before the job starts.

How to raise it fairly

Start with the company. The FTC says to try to resolve a home improvement problem with the contractor first, follow phone calls with a letter sent by certified mail, and keep notes and copies. Send your photos and ask the company to look in person.

If that doesn’t work, the FTC lists your state attorney general, a local consumer protection office and dispute resolution programs. In Arizona, for example, the attorney general’s complaint unit offers an informal process to help consumers and businesses resolve disputes. If you paid by credit card, the FTC explains that you may be able to take a quality problem to your card issuer. One condition is that you tried to settle it with the seller first, and rights can differ by state. For anything beyond that, talk to a qualified professional about your state’s rules.

For what a fair job should cost, see our house washing cost guide. For how we check our facts, see our methodology.

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