Short answer: Maybe — but don’t start there. The best approach is to begin with the gentlest cleaning method possible. Sweep, use a leaf blower, rinse with a garden hose. If you don’t see visible staining, you can often soak the pavers with an eco-friendly cleaning solution, give them a light scrub with a brush, and rinse with the hose.

Only when stains are stubborn or widespread should you consider pulling out the pressure washer — and in those cases, the best solution might be calling in a pro.

Here’s everything you need to know before you decide.

The Benefits of Pressure Washing Pavers

• Restores original appearance by removing dirt, algae, moss, and mildew.
• Prevents long-term damage by removing moisture-trapping buildup.
• Prepares the surface for sealing by ensuring it’s clean and open.

Done wrong, though, pressure washing can do more harm than good.

Risks of Improper Pressure Washing

• Surface damage from high pressure or incorrect nozzle use.
• Loss of joint sand, leading to shifting and instability.
• Streaks or uneven cleaning that permanently affect the look of your patio.

Choosing the Right Pressure Washer & Nozzle

PSI Recommendation: Stick with 1,200–1,800 PSI for pavers. Any higher and you risk surface damage.

Nozzles to Avoid:

• Red Tip (0°): Too powerful and concentrated — never use this on pavers.
• Yellow Tip (15°): Still aggressive and likely to erode joint sand.

Preferred Nozzles:

• White Tip (40°): Start here. Best for rinsing and safe for most surfaces.
• Green Tip (25°): Only use if the 40° tip isn’t cutting it. Use with caution.

You’ll find the spray degree listed on the nozzle itself, typically engraved near the base. Most manufacturers use standard color-coding, but always verify.

Surface Cleaners: A circular surface cleaner attachment distributes water evenly and helps avoid disturbing the joint sand.

Using Eco-Friendly Cleaners

Avoid harsh chemicals when you can. These options are effective and safe around landscaping:

• Vinegar and water (1:1) is great for moss and mildew.
• Baking soda, dish soap, and warm water works well on grime.
• Commercial biodegradable cleaners (like Simple Green) are safe and effective.

Many pressure washers include a detergent tank that allows you to apply cleaning solutions with the black soap nozzle. Remember, that nozzle is for application only — not rinsing or blasting.

Aftercare: Don’t Forget to Re-Sand

If pressure washing dislodges joint sand, reapply polymeric sand properly:

1. Make sure paver joints are completely clean and dry.
2. Pour polymeric sand gently across the surface and sweep it into the joints using a stiff broom.
3. Do not leave excess sand on top of the pavers — it will harden wherever it lands.
4. Once joints are full and the surface is clean, lightly mist the patio with water to activate the sand’s binding agents. Avoid overwatering.

This locks the pavers in place and helps prevent weeds, ants, and erosion.

Genstar’s Final Word

Pressure washing your pavers can be a smart move — but start with the basics. A broom, a brush, and a hose go a long way. Only reach for the pressure washer if you need it.

Use the right pressure. Pick the right tip. Protect your joints. And if it feels like a lot, call someone who knows what they’re doing.

At Genstar, we’ve been building and maintaining paver patios across Long Island for years. If you need help, we’ve got your back.

Need advice? Want a professional clean and reseal?
Call us at 516-902-0869.
Built solid. Built right. Built by Genstar.