How to pressure wash driveway

July 18, 2023

Elerein Yanki

Hi, I am Yanki, the founder of bisonclean.com. I have been in the cleaning equipment field for more than 5 years now, and the purpose of this article is to share with you the knowledge related to cleaning equipment from a Chinese supplier's perspective.

Pressure washing is an effective, efficient, and environmentally friendly method of cleaning various surfaces, particularly driveways. If you’re a pressure-washing distributor or a pressure washer dealer, understanding the process in depth can help you provide better service to your customers and sell the right equipment.

How to pressure wash driveway? This comprehensive guide will walk you through all the steps and precautions you need to know.

Why pressure wash your driveway?

Driveways are frequently exposed to various elements, including dirt, oil, grime, and even algae. Over time, these contaminants can stain and damage the driveway, affecting its aesthetics and durability. Regular pressure washing not only keeps driveways looking fresh and clean but also extends their lifespan by preventing the buildup of harmful substances.

A well-maintained driveway can significantly enhance a property’s curb appeal, increasing its value. Therefore, pressure washing services are in high demand among homeowners, making them a profitable offering for pressure washing companies.

Recognizing the early signs of a dirty driveway helps prevent longer-term damage: watch for visual cues such as green patches, oil or tire marks, dull patches, and slippery surfaces, alongside safety cues like reduced grip and an increased slip risk in wet weather. Reappearing dark oil or tire marks and green patches in shaded areas are reliable signals that it’s time to re-clean a driveway, while reduced surface grip and increased slipping risk after rain should be treated as safety-based indicators for re-cleaning rather than purely cosmetic ones.

Safety first: The importance of precautions

Following key precautions protects you and your driveway before you begin pressure washing. Here’s an expanded list of safety measures to adhere to:

Protective gear: Always wear safety glasses and gloves. Consider wearing sturdy footwear and long pants to protect your legs and feet from any flying debris. A waterproof jacket can also keep you dry during the process.
Avoid direct contact: Never point the nozzle at people or animals. The water stream from a pressure washer is powerful enough to cause serious injuries.
Control the pressure: Be careful not to over-pressurize the surface. Too much pressure can damage the driveway, causing cracks or dislodging pieces of concrete or asphalt. Improper pressure washing can also cause pitting, surface etching, aggregate exposure, and expansion joint damage on concrete driveways, and older, weakened concrete is especially vulnerable to damage when high pressure is concentrated too closely to the surface.
Secure the surroundings: Make sure the area around the driveway is clear. Secure loose objects that could potentially be moved or damaged by the pressure washer.
Avoid unstable footing: Never use a ladder while pressure washing, since the recoil force of the spray can destabilize you and cause falls.
Handle chemicals with care: If you’re using a cleaning solution, handle it with care. Follow the manufacturer’s instructions regarding its use and storage, and ensure it doesn’t come into contact with your skin or eyes.

How to pressure wash driveway: step-by-step

Before beginning, gather all necessary equipment and materials, including a pressure washer with an optional surface cleaner attachment, protective clothing, a brush, weed killer, driveway detergent, and a garden hose for rinsing.

Step 1: Preparing the driveway – The key to effective cleaning

Before you start pressure washing, prepare the driveway properly. Remove any furniture, vehicles, or other objects from the driveway. Use a broom or leaf blower to sweep away loose dirt, leaves, and other debris.

For stubborn stains like oil or grease, consider applying a driveway cleaning solution as a pre-treatment before pressure washing. These specialized solutions are designed to break down tough stains, making them easier to wash away. Oil and grease stains should have the degreaser dwell for 10-15 minutes before being worked with a 15° or 25° nozzle, moving from the outside of the stain inward.

Step 2: Choosing and attaching the right nozzle

Choosing the right pressure washer nozzle is one of the most important steps in how to pressure wash a driveway effectively. Most pressure washers come with several different nozzles, each designed for a different type of cleaning job.

Nozzles are typically color-coded by spray angle: red is 0° for concentrated stubborn-stain removal, yellow is 15° for deep cleaning, green is 25° for general driveway cleaning, white is 40° for light rinsing, and black is a low-pressure tip for detergent application.

For general cleaning, such as removing dirt or mildew, the green 25-degree nozzle is usually the best choice. This nozzle provides a wide spray that covers a large area, making it perfect for cleaning large, flat surfaces like driveways. If you’re using a cleaning solution, you’ll need to switch to the black soap nozzle. This nozzle has a larger opening that allows the pressure washer to draw in the cleaning solution and mix it with the water.

Step 3: Mastering the art of pressure washing

To start pressure washing, turn on the unit and adjust the pressure setting. Start with a low setting and increase it as needed. Remember, too much pressure can damage the driveway, so it’s better to start low and gradually increase the pressure if necessary.

When you’re ready, start pressure washing at one end of the driveway. Use a sweeping motion, working your way across the driveway, keeping the nozzle at a working distance of about 20- 30 cm (8-12 inches) from the surface to balance cleaning power against risk of surface damage. Keep the nozzle moving at all times to avoid focusing the water pressure on one spot for too long, which could damage the surface.

Step 4: The final rinse

Once you’ve finished pressure washing, it’s time for the final rinse. This step is essential to remove any residual dirt, debris, or cleaning solution from the driveway. Use clean water and make sure to cover the entire driveway. Allow it to dry completely before using it again.

If streaking appears, it typically stems from uneven pressure application or leftover residue and can be corrected by adjusting the technique accordingly.

Step 5: Sealing your driveway after cleaning

Allow the driveway to dry completely for 24–48 hours after washing before applying a sealant to seal open pores, block stains and moisture, and extend cleanliness from 6–12 months to 1–3 years.

Additional tips for a perfectly clean driveway

Here are some additional tips to help you get the most out of your pressure washing experience:

Frequency: If the driveway is in good condition, a yearly pressure wash may be sufficient. However, if the driveway gets dirty quickly or has stubborn stains, more frequent cleaning may be necessary.
Type of pressure washer: For small driveways or areas, a handheld pressure washer should suffice. For larger driveways, a walk-behind model will be more efficient and less tiring to use.
Pressure settings: Concrete driveways can withstand higher pressure settings, generally 2,500-3,000 PSI. Asphalt driveways require a lower pressure setting to prevent damage, typically 1,300-2,300 PSI.
Pre-cleaning repairs: If there are any cracks or holes in the driveway, repair them before pressure washing. Water from the pressure washer can seep into these areas and cause further damage.

Conclusion

By following this guide, you’ll be able to pressure wash a driveway safely and effectively. Whether you’re a pressure washing company looking to improve your service or a dealer aiming to provide better advice to your customers, understanding the process in detail is key.

As a professional pressure washer manufacturer, Elerein delivers the robust reliability and consistent power your market demands, ensuring every pressure washer we build helps you keep driveways pristine longer. Partner with us to expand your commercial catalog with top-tier equipment built to outlast tough working conditions.

FAQs about pressure wash driveway

How do you pressure wash a driveway with a surface cleaner?

If using a surface cleaner, apply the same core principles: start with low-to-moderate pressure, keep it moving steadily, and avoid lingering to prevent gouging or streaking.