Parking Lot Pressure Washing
In North Dallas, TX

What Parking Lot Pressure Washing Removes

A commercial lot collects things that a broom will not touch. Oil and transmission drips under every stall. Tire rubber and skid marks at the turns. Grease trails behind restaurants and dumpster pads that have been leaking for a season. Gum, bird droppings, algae on the shaded north side, red clay tracked in off a construction entrance, and the gray film that settles on everything between rains. We clean all of it. The point is not only appearance — oil and algae are the two things that make a lot slippery, and a stained entrance drive is the first thing a customer sees and the last thing a property manager gets asked about.

Parking Garage and Multi-Level Structure Cleaning

Structures are their own job. A parking garage is enclosed, it drains to a designed system, and grass is not an option, and the deck above someone’s car is not a place to be casual with water. Multi-level parking structures also collect what an open lot does not: exhaust film on the ceilings and walls, tire rubber ground into the ramps, and standing residue in the drive lanes where the sun never reaches. We work structures deck by deck so half the building stays open, control where the water goes at each level, and coordinate with property management on which bays close when. Stairwells, entry ramps, and elevator lobbies get cleaned as part of the same visit, because those are the surfaces people actually touch.

Pressure Washing vs Power Washing

The two terms get used interchangeably, and there is a real difference underneath them. Power washing heats the water; pressure washing does not. Heat helps on grease, oil, and anything organic that has bonded to the surface, which is why it earns its place behind a restaurant or on a dumpster pad. Unheated pressure at the right setting handles most of what an open parking lot accumulates, and it is gentler on older asphalt. We carry both and pick per surface and never per marketing term. If someone quotes you one word or the other as though it were a different service, it is worth asking what they are actually bringing.

Surfaces: Asphalt, Concrete, and Sealed Decks

Surface	What it takes	What to watch
Asphalt	Moderate pressure, wide fan	Too much pressure lifts the binder and leaves a scoured patch that never matches
Concrete	Higher pressure, surface cleaner attachment	Stains sit deeper; oil often needs a pre-treatment dwell rather than more pressure
Sealed or coated decks	Low pressure, coating-safe method	The coating is the asset; stripping it costs far more than the cleaning saved
Painted markings	Reduced pressure, angled away from the line edge	Fresh paint and thermoplastic edges lift if hit square on

The judgment is in the pressure and the angle, never the machine. We set both for the pavement in front of us and never crank them to maximum.

Wash-Water Capture and TCEQ Stormwater Rules

This is the part most quotes never mention, and it is the reason a cheap wash can become a property manager’s problem.

Rainwater running off a lot into a storm drain is what the system is designed for. Wash water carrying oil, grease, and detergent is not — it is a non-stormwater discharge, and the federal framework for that is the National Pollutant Discharge Elimination System, which in Texas is administered by the Texas Commission on Environmental Quality as the Texas Pollutant Discharge Elimination System. The practical consequence for a commercial lot is straightforward: contaminated wash water should be contained and disposed of properly and never pushed into the nearest storm inlet, and the municipal separate storm sewer system operator for your city sets the local expectations on top of that.

So we block and berm inlets where the work warrants it, recover water, and dispose of it properly. On a garage deck that means working with the structure’s drainage instead of against it. If your property sits under a specific municipal stormwater requirement, tell us and we will work to it.

Sources: TCEQ Texas Pollutant Discharge Elimination System; EPA NPDES — National Pollutant Discharge Elimination System.

Cleaning Before Striping or Sealcoating

Paint bonds to the surface. It does not bond to what is sitting on top of it. Striping over an oily, dusty, or algae-covered lot is the single most common reason lines fail early — they look fine on the day and lift within a season. Where we are striping or sealcoating a lot that has not been cleaned in years, washing first is not an upsell, it is what makes the rest last. Oil spots in particular want a dedicated pre-treatment before any coating goes down, because a spot that has soaked into asphalt will bleed back through fresh sealer.

How Often Commercial Lots and Garages Need Cleaning

It depends on what the property does. Restaurants, grocery anchors, and anything with a dumpster pad or a drive-through generate grease continuously and are usually on an annual or twice-yearly cycle. Office and medical lots go longer. Parking garages tend to need more frequent attention than the open lot beside them, because nothing rinses them. The honest test is not a calendar: look at your entrance drive and your dumpster pad, and if either is visibly darker than the rest of the lot, it is due.

Our Cleaning Process

1. Walk and quote. We look at surfaces, stains, drainage, and access, and put a scope on paper.
2. Protect and prepare. Inlets protected, vehicles cleared, pre-treatments applied where oil warrants it.
3. Clean by surface. Pressure and method set per surface, working in sections so the property keeps operating.
4. Recover and dispose. Wash water controlled, recovered, and disposed of properly.
5. Final walk. Call (940) 298-0200 for a free estimate.