Most homeowners need a pressure washer in the 1,300 to 2,000 PSI range for cars, patio furniture, siding, and wood decks, and 2,500 to 3,000 PSI or more for concrete driveways and sidewalks. PSI is only half the story, though. Flow (GPM), the nozzle you pick, and the surface itself decide whether you get a clean finish or etched concrete and splintered wood. Use the chart below to match the pressure to the job.
Pressure Washer PSI Chart by Job
| Job | Recommended PSI | Nozzle | Notes |
|---|---|---|---|
| Cars and trucks | 1,200–1,900 | 25° (green) or 40° (white) | Keep the tip well back from paint, trim, and seals. |
| Patio furniture | 1,300–1,800 | 40° (white) | Light-duty job; a small electric washer is enough. |
| Wood decks and fences | 500–1,500 | 25° (green) or 40° (white) | Soft woods like pine and cedar splinter easily. Work with the grain. |
| Composite decking | 1,500–2,000 | 25° (green) or 40° (white) | Check the decking maker’s care guide first. |
| Vinyl siding | 1,300–2,000 | 40° (white) or soap tip | Never spray upward under the laps. Mildew and algae need a cleaner, not more pressure. |
| Concrete driveways and sidewalks | 2,500–4,000 | 15° (yellow) or 25° (green), or a surface cleaner | Higher flow (GPM) speeds the job up and avoids stripes. |
| Asphalt shingle roofs | Do not pressure wash | — | Roofs are soft washed with a low-pressure cleaning solution. |
Sources do not always agree. BLACK+DECKER, for example, puts decks and siding at 1,800 to 2,500 PSI and driveways at 2,500 to 2,800 PSI. When ranges differ, start at the low end with a wide nozzle and only move closer or switch tips if the dirt is not coming off.
Light, Medium, or Heavy Duty: Which Class Fits Your Home?
Retailers group pressure washers into three classes. The Home Depot lists them like this:
- Light duty (300–1,999 PSI, up to 1.5 GPM): cars, patio furniture, grills, and small patios.
- Medium duty (2,000–3,299 PSI, up to 2.8 GPM): decks, fences, siding, and driveways.
- Heavy duty (3,300–4,600+ PSI, up to 4.0 GPM): large concrete areas, stains, and commercial work.
For a typical North Texas home with a driveway, sidewalk, and back patio, a medium-duty machine around 2,500 to 3,000 PSI covers most jobs. Pair it with a wide nozzle for anything softer than concrete.
Why GPM Matters as Much as PSI
PSI is how hard the water hits. GPM (gallons per minute) is how much water moves the dirt away. Multiply the two and you get “cleaning units.” Dultmeier’s example compares two 3,000 PSI machines: one at 2.5 GPM (7,500 cleaning units) and one at 4.0 GPM (12,000 cleaning units). The higher-flow machine rinses debris away faster and finishes the job sooner, without needing more pressure. On a large driveway, extra flow saves more time than extra PSI. For a deeper look, read our PSI vs GPM pressure washer guide.
Pressure Washer Nozzle Guide
- 0° (red): a pinpoint jet for stuck-on debris and expansion joints. It can damage surfaces quickly, so most homeowners should leave it in the box.
- 15° (yellow): stripping, grease, gum, and tough stains on concrete.
- 25° (green): the all-purpose tip for decks, fences, vehicles, and general cleaning.
- 40° (white): wide spray for siding, windows, patios, and rinsing.
- Soap tip (black, about 65°): low pressure for applying detergent and gentle rinsing.
Surfaces That Should Not Get High Pressure
Some surfaces need a cleaner, not more PSI. The Asphalt Roofing Manufacturers Association says not to use a power washer to clean algae from shingles and warns that high-pressure washing is likely to damage asphalt roofing. The same logic applies to painted wood, older siding, stucco, and window screens. These surfaces are cleaned with a soft wash: a low-pressure spray of cleaning solution that kills mildew and algae, followed by a gentle rinse. If you want to clean a deck by hand instead, see our guide on how to clean a deck without a pressure washer.
Buy, Rent, or Hire a Pro?
A small electric washer is a good buy for cars, furniture, and quick patio rinses (see gas vs. electric pressure washers). Big concrete jobs are a different story. A clean, stripe-free driveway takes a high-flow machine, a surface cleaner, and pre-treatment for oil and rust stains. Houses and roofs need soft wash equipment and the right cleaning solution.
In Arlington and the Dallas-Fort Worth area, Stegmeier Pressure Washing cleans driveways for $150 to $300, depending mostly on square footage and stains. See our driveway washing service, our low-pressure house washing and roof washing, or the full list of pressure washing prices.
Frequently Asked Questions
Is 2,000 PSI enough to clean a driveway?
It can clean light dirt off a driveway, but it will be slow. Dultmeier recommends 2,500 to 4,000 PSI for concrete. At 2,000 PSI, use a 15° or 25° nozzle, pre-treat stains, and expect to make more passes.
Is 3,000 PSI too much for a house?
For siding, yes, if you use a narrow nozzle or stand close. Vinyl siding cleans at about 1,300 to 2,000 PSI. Water forced up under the laps can get behind the siding. Mildew and algae come off with a cleaning solution applied at low pressure, which is how professional house washing is done.
Is 1,000 PSI enough to wash a house?
It is enough to rinse dust and pollen off siding. It will not remove green or black growth on its own. For that, apply a house wash cleaner first, let it work, and then rinse.
Is 3,000 PSI too much to wash a car?
It is above the 1,200 to 1,900 PSI range recommended for cars. If 3,000 PSI is all you have, use the 40° nozzle, keep the tip well back from the paint, and avoid aiming at trim, seals, and chips.
What PSI do I need for a wood deck?
Start at 500 to 1,500 PSI for wood decks and fences, and 1,500 to 2,000 PSI for composite decking. Use a 25° or 40° nozzle and keep the spray moving with the grain.
Sources: Dultmeier, “Pressure Washers: What PSI Do I Need?”; BLACK+DECKER, “What PSI pressure washer is best for home use?”; The Home Depot, “Pressure Washer Buying Guide”; Alkota, “What Do Different Nozzles for Pressure Washers Do?”; Asphalt Roofing Manufacturers Association, “Algae Discoloration”. Driveway prices are Stegmeier Pressure Washing’s published rates as of October 2026.
