Pressure Washing
What PSI to Pressure Wash Pavers (1,500 to 2,500 PSI)
Quick answer
Pavers take 1,500 to 2,500 PSI and at least 2.0 GPM with a 25 degree tip or a surface cleaner held about 12 inches away. Pressure washing strips joint sand, so plan to re-sand. At 2.5 GPM a 400 square foot patio takes about 64 minutes with a wand, 16 with a surface cleaner.
The paver itself is concrete and takes pressure well. The joints are the catch: the sand between pavers is what locks the field together, and a pressure washer removes it whether you meant to or not. Cleaning a paver patio is really a two-part job, wash and re-sand, and skipping the second part is how patios start shifting.
Work out your patio area and time in the pressure washer PSI calculator, and size replacement sand with the paver calculator.
On this page
What PSI do I need to clean pavers?
| Setting | Pavers |
|---|---|
| Pressure | 1,500 to 2,500 PSI |
| Minimum flow | 2.0 GPM |
| Nozzle | 25 degree, or a surface cleaner |
| Distance from the surface | 12 in |
| Cleaning rate | About 2.5 sq ft per minute for each 1 GPM with a wand |
| Surface cleaner | Yes, roughly four times the wand rate |
| After washing | Re-sand the joints with polymeric sand once the pavers are fully dry |
| Watch for | Blasting joint sand out, and undercutting the bedding layer at paver edges |
Pressure washing strips joint sand. Plan to re-sand joints with polymeric sand after the pavers dry completely, or the field will start to shift and weeds will return quickly.
Which nozzle should I use on a paver patio?
| Tip | Color | Use on pavers |
|---|---|---|
| 25 degree | Green | The standard wand tip for paver faces, steps and edge courses. |
| 40 degree | White | Gentler first pass, and the tip to use right along joints you want to disturb less. |
| 65 degree or soap | Black | Applies cleaner for moss, algae and efflorescence before any pressure. |
| Surface cleaner | n/a | Even results across the field, no striping, and far less joint blowout than a narrow wand. |
The 15 degree tip strips joints aggressively and the 0 degree tip can chip paver faces. Neither belongs on a patio.
How long does it take to clean a paver patio?
| Patio size | 1.4 GPM | 2.0 GPM | 2.5 GPM | 2.5 GPM with a surface cleaner |
|---|---|---|---|---|
| 200 sq ft | 57 min | 40 min | 32 min | 8 min |
| 400 sq ft | 114 min | 80 min | 64 min | 16 min |
| 600 sq ft | 171 min | 120 min | 96 min | 24 min |
| 800 sq ft | 229 min | 160 min | 128 min | 32 min |
Minutes = area divided by (GPM x 2.5 square feet per minute per GPM), the same formula the pressure washer PSI calculator uses. A rotary surface cleaner is estimated at four times the wand rate. Heavy staining, mildew and detergent dwell time add to every figure, and a pass with detergent plus a rinse pass doubles the wand time.
How do I clean and re-sand pavers step by step?
- Pull weeds and sweep. Remove weeds and moss from the joints by hand first. Blasting them out leaves roots and throws grit at windows and doors.
- Apply a paver cleaner. Use a cleaner rated for concrete pavers on moss, algae and efflorescence, and let it dwell per the label before rinsing.
- Wash with a surface cleaner if you can. A rotary cleaner keeps a fixed height, so it lifts less joint sand than a wand and leaves no striping across a visible patio.
- Let the patio dry completely. Polymeric sand needs dry joints. Give the pavers at least a full dry day, longer in shade, before sanding.
- Sweep in polymeric sand. Fill joints to within about an eighth of an inch of the surface, sweep the excess off the faces, then compact or tamp so the sand settles.
- Activate the sand with water. Mist per the sand label, in the amounts and pauses it specifies. Too much water washes the binder out and leaves a haze.
Do I have to re-sand pavers after pressure washing?
Yes, if you used a pressure washer at all. Joint sand does structural work: it transfers load between pavers so the field behaves as one surface rather than as loose blocks. Joints that are left empty let pavers rock, edges creep outward and weeds seed straight into the gap.
Polymeric sand is the usual replacement because the binder hardens and resists washout. Alliance Gator Supersand G2 Polymeric Sand (50 lb) covers standard concrete paver joints and DOMINATOR Polymeric Sand (40 lb) is rated for wider flagstone joints, from an eighth of an inch up to 4 inches at a minimum one inch depth. Work out how much you need with the paver calculator. The same wash-and-refill logic does not apply to the driveway, which is covered in what PSI a concrete driveway takes.
Which pressure washers suit pavers?
Flow and a surface cleaner matter more than raw PSI here. Compare classes in electric vs gas pressure washers.
Champion 2800 PSI 2.1 GPM Low Profile Gas Pressure Washer
$499.992,800 PSI and 2.1 GPM in a low frame that rolls over lawn and steps. The flow is enough to keep a surface cleaner spinning at full speed across an open field of pavers.
Best for: patios of 300 square feet and up
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Greenworks 3000 PSI 2.0 GPM Brushless Electric Pressure Washer
$349.992.0 GPM meets the paver minimum exactly, with no engine, no fuel and a 25 foot kink-resistant hose. Use the 25 degree tip at 12 inches to keep pressure at the surface in range.
Best for: smaller patios and walkways near an outlet
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Simpson Clean Machine 3400 PSI 2.5 GPM Gas Pressure Washer
$329.992.5 GPM cuts a 600 square foot patio to roughly 96 minutes with a wand or about 24 with a surface cleaner, and the same machine handles the driveway afterward.
Best for: households with both a patio and a long driveway
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Westinghouse 15 in. Pressure Washer Surface Cleaner
$39.99A 15 inch rotary cleaner rated to 3,400 PSI that holds a fixed height, so it lifts far less joint sand than a wand while cutting the time to about a quarter.
Best for: anyone cleaning more than about 200 square feet of pavers
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Alliance Gator Supersand G2 Polymeric Sand (50 lb)
$79.98Polymeric sand for joints up to 2 inches that the maker lists as rainfast in 15 minutes. Re-sanding is what keeps the patio from shifting after a wash.
Best for: standard concrete paver patios and walkways
Check price on AmazonHow we chose
We did not test these products in person. Picks are researched from manufacturer specifications and owner manuals, engine and safety certifications where they apply, warranty terms, public recall records, and the recurring themes in verified owner reviews. We favor established brands with large review counts and parts support, match each pick to a real yard size or task, and place it in the tier where its price and capability actually belong.
Frequently asked questions
Will pressure washing ruin my pavers?
The pavers themselves usually survive fine at 1,500 to 2,500 PSI with a 25 degree tip. What suffers is the joint sand, which washes out and leaves the field loose, and the bedding layer at open edges, which can be undercut if you point the wand into a gap. Wash at a steady 12 inches, prefer a surface cleaner, then re-sand once everything is dry.
What kind of sand goes back in paver joints?
Polymeric sand is the common choice for residential patios because the binder hardens after watering and resists washout and weed seeding. Match the product to your joint width: standard concrete paver joints and wide flagstone joints use different products and different minimum depths. Joints must be dry when you sweep it in, and watering follows the label exactly.
How often should a paver patio be pressure washed?
Every two to three years is plenty for most patios, and shaded patios under trees may want it more often. Because each wash strips joint sand, more frequent washing means more re-sanding. Sweeping regularly, keeping leaf litter off the surface and treating moss with a cleaner rather than pressure stretches the interval considerably.
Can I use a surface cleaner on pavers?
Yes, and it is usually the better tool. The rotary bar holds a fixed height so it delivers even dwell, which both prevents striping and disturbs less joint sand than a wand swinging at varying distances. It also cuts the time to roughly a quarter: a 600 square foot patio drops from about 96 minutes to about 24 at 2.5 GPM.
Researched, not professional advice. This page is compiled from published specifications, manuals, labels and owner-review consensus, not hands-on testing. Follow the manufacturer's instructions and product label, and consult a qualified professional where safety, chemicals, fuel or structures are involved. As an Amazon Associate we earn from qualifying purchases.