A pressure washer is a powerful tool for keeping your outdoor spaces looking their best, but using one incorrectly can cause damage or even injury.
Whether you're a first-time user or just looking to improve your technique, this guide will walk you through the basics of pressure washing safely and effectively.
In this blog, we'll cover:
1. What a pressure washer is and how it works
2. Safety tips to keep in mind
3. Step-by-step instructions for beginners
4. The best pressure washer settings for different surfaces
5. How to choose the right nozzle
6. Common mistakes to avoid
7. When it's best to call in the professionals
What Is a Pressure Washer and How Does It Work?
A pressure washer is a machine that uses a powerful jet of water to clean surfaces like patios, driveways, decking, and garden furniture. It works by forcing water through a narrow nozzle at high pressure, effectively blasting away dirt, grime, moss, and algae.
Pressure washers can be electric or petrol-powered, and they often come with different nozzles or settings to suit various tasks. They're a fantastic tool for refreshing your outdoor spaces—but only if used correctly and safely.
Looking to spruce up your garden this summer? Read our guide on how to pressure wash your patio
Safety Tips to Follow When Using a Pressure Washer
Pressure washers can cause damage or injury if not used properly. Here's how to stay safe:
- Always wear protective gear, including safety glasses, gloves, and sturdy shoes.
- Never point the spray at people, pets, or delicate plants.
- Keep the nozzle at least 30cm (12 inches) away from surfaces to avoid damage.
- Check the power cord and hose for damage before use.
- Avoid using a ladder while pressure washing - high-pressure water can cause you to lose balance.
- Test the pressure on a small, inconspicuous area first.
- Be mindful of electrical outlets—water and electricity don't mix!
- Store your pressure washer safely, away from children.
If in doubt, contact Green Gardens—our team has the experience and equipment to clean safely and effectively.
Step-by-Step Instructions on How to Use a Pressure Washer Properly
Follow these simple steps for safe and effective pressure washing:
1. Read the Manual
Every machine is different. Familiarise yourself with the manufacturer's instructions before you begin.
2. Set Up Your Area
Remove obstacles, cover delicate plants, and sweep away loose debris.
3. Connect the Water Supply
Attach your garden hose securely to the pressure washer.
4. Choose the Right Nozzle
Select the appropriate nozzle for your task (see the guide below).
5. Start the Machine
Turn on the water tap first, then start the pressure washer according to the manual.
6. Test on a Small Area
Spray a small, hidden area to check the pressure won't damage the surface.
7. Maintain the Right Distance
Hold the nozzle about 30–60cm (12–24 inches) from the surface.
8. Use a Sweeping Motion
Move the nozzle in a steady, side-to-side motion. Don't hold the spray in one spot for too long.
9. Work from the Top Down
Start at higher points like walls or fences, then move to lower areas like patios.
10. Rinse Thoroughly
After cleaning, rinse the area with low-pressure water if necessary.
11. Turn Off Safely
Shut off the pressure washer first, then turn off the water supply.
12. Clean Up
Disconnect hoses, drain water from the machine, and store everything properly.
Need a professional touch?
Green Gardens offers safe, effective pressure washing as part of our garden maintenance services.
Best Pressure Washer Settings for Different Surfaces
Different surfaces need different pressures to clean safely:
- Patios and driveways: Medium to high pressure (1500–3000 PSI)
- Decking and wooden furniture: Low to medium pressure (1200–2000 PSI)
- Brick walls: Medium pressure (1500–2500 PSI)
- Garden ornaments: Low pressure (under 1500 PSI)
- Delicate surfaces (painted walls, fences): Low pressure (start low and increase gradually)
If unsure, always start with the lowest setting and increase as needed.
Read our guide on the best time of year to pressure wash your property
How to Choose the Right Nozzle for Your Pressure Washer
Nozzles control the angle and intensity of the water spray:
- 0° nozzle (red): Very concentrated, high-pressure jet—use with extreme caution.
- 15° nozzle (yellow): Narrow spray for tough stains like grease or moss.
- 25° nozzle (green): Good for general cleaning of patios, driveways, and decking.
- 40° nozzle (white): Wide spray for delicate surfaces like cars, fences, or painted walls.
Not sure which nozzle to use? Green Gardens can help you choose the right one for your specific job.
Common Mistakes to Avoid When Using a Pressure Washer
Pressure washing is simple—if you avoid these common errors:
- Holding the nozzle too close to the surface (this can cause damage)
- Using too much pressure on delicate surfaces
- Skipping safety gear (always wear goggles and gloves)
- Neglecting to test a small area first
- Forgetting to rinse surfaces thoroughly after applying detergent
- Using the wrong nozzle for the job
- Over-watering areas like lawns or flower beds accidentally
- Leaving standing water on surfaces, which can lead to slippery patches
Avoiding these mistakes ensures better results—and keeps you and your garden safe.
When to Hire Professional Pressure Washing Services
While DIY pressure washing can be a great option for smaller, straightforward jobs, it's not always the best choice.
Consider hiring Green Gardens for professional pressure washing services when:
- You have a large or complex area to clean, like a large driveway or multi-level patio
- You're concerned about damaging delicate surfaces
- You want a deep, long-lasting clean with professional-grade equipment
- You'd rather save time and effort and leave it to the experts
- You want regular pressure washing as part of a full garden maintenance service
Green Gardens has the experience, tools, and expertise to clean your outdoor spaces quickly, safely, and effectively.
Call our gardeners in Surrey today on 01372 510050 or 01403 283900 or email [email protected] to book your pressure washing service and keep your garden looking its best.
