Best pressure washer for concrete

Concrete is the one surface in the yard that rewards everything a pressure washer can deliver. There is no risk of furring the grain, no coating to lift, and no soft fibers to raise — so the specification that matters is simply output, and one of these two machines has considerably more of it.

The short answer

Why flow matters as much as pressure

Generac describes PSI and GPM as figures that must be read together: pressure lifts the dirt, flow carries it away. On flatwork, where you are moving a film of grime across a large area rather than blasting a spot, the flow half does more work than people expect.

For a deck, that ratio is a hazard rather than a feature — see pressure washers for decks and fences. For a driveway it is simply fewer passes.

The two, on published figures

1. Greenworks 60V — the most output per pass

Six thousand cleaning units is the highest figure in our registry, and on a driveway that converts directly into fewer passes for the same result. Cordless also removes the extension cord from a job done on a wet, open surface.

The published Eco mode (2200 PSI / 1.0 GPM) is a bonus rather than the point here — it exists for the soft materials this page is not about.

The limit is runtime: up to 30 minutes. A two-car driveway is realistically a two-battery job, and Greenworks publishes no nozzle count or hose length for this model.

#ad Check the Greenworks 60V 3000 PSI Cordless Pressure Washer price on Amazon — how we're funded.

2. Sun Joe SPX3000 — lower output, no clock

About 2,436 cleaning units, five quick-connect nozzles including the 25 degree tip that is the right one for concrete, two 0.9 L detergent tanks, a 20 ft hose and a 35 ft cord.

Corded is the argument on a big slab. A driveway is a long job, and mains power does not stop at 30 minutes. Two detergent tanks also let you carry a concrete cleaner and a rinse without swapping bottles mid-job.

It will take roughly two and a half times as many passes as the Greenworks to shift the same film. On a small path that is irrelevant; on a 600 sq ft driveway it is the afternoon.

#ad Check the Sun Joe SPX3000 Electric Pressure Washer price on Amazon — how we're funded.

The attachment that changes the job

Washing a driveway without striping it

1. Sweep first. Grit under pressure scours the surface and blocks the drain you are about to send it to.
2. Use the 25 degree nozzle, never the zero degree. A narrow tip on old concrete pits it.
3. Keep the wand at a constant height and angle, and overlap each pass by about a third. Height changes are what create the stripes.
4. Work in one direction, with the slope, so the lifted dirt runs off the clean surface rather than back across it.
5. Watch where the runoff goes. Detergent and oil film heading into a storm drain is the part of this job with consequences beyond your driveway.

The full technique page is how to pressure wash a driveway.

The warning that still applies

The U.S. Consumer Product Safety Commission has warned that pressure washer streams can cause serious injury, including driving material under the skin. Concrete does not change that: the stream that lifts tire marks will open a hand. Eye protection, closed boots, and never a zero degree tip near a foot.

What we cannot tell you

We have not washed concrete with either machine. Neither publishes a coverage rate in square feet per hour, a surface-cleaner compatibility list, or a nozzle-by-nozzle force figure. Greenworks publishes no nozzle count, hose length or detergent capacity. And nobody publishes a safe standoff distance for old or spalling concrete, which is the one case where flatwork can be damaged.