A clean and well-maintained patio can completely transform your outdoor space, making it more inviting while extending the lifespan of your paving. Pressure washing is one of the most effective ways to remove dirt, moss, and tough stains. However, some stains, such as grease and oil, can be difficult to remove, especially on porous surfaces.
However, doing it incorrectly can lead to costly damage. This guide will walk you through how to jet wash a patio safely and effectively, keeping it looking pristine for years to come.
What Is Jet Washing?
Jet washing uses a high-pressure water stream to remove built-up grime, moss, algae, and other debris from surfaces. It’s a quick and efficient way to refresh your patio, but it requires care—especially when dealing with delicate materials like natural stone.
Why Is Proper Technique Important?
While jet washing is powerful, improper use can lead to:
Surface Damage: High-pressure settings can erode soft materials like sandstone or damage older paving.
Dislodged Jointing Material: Excessive pressure can loosen the material between slabs, compromising the stability of your patio.
Fading: Overuse can strip away protective sealants and leave surfaces exposed to weather damage. By following the right steps, you can avoid these issues and enjoy a sparkling clean patio.
Signs You’re Overdue for a Patio Clean
Not sure if it’s time to clean your patio? Look for these signs:
- Slippery Surfaces: A build-up of moss or algae makes patios hazardous, especially in damp weather.
- Discolouration: Persistent stains or a general dull appearance are strong indicators.
- Pooling Water: Debris in the joints can block drainage, leading to water accumulation. Not all people have access to specialised cleaning facilities, so consider accessible methods for maintaining a patio.
Addressing these issues promptly prevents minor concerns from escalating into costly repairs.
How to Jet Wash A Patio in 7 Easy Steps
1. Gather Your Tools and Equipment
Before you begin, ensure you have the following: A pressure washer with adjustable settings. A fan or rotating brush nozzle for controlled cleaning.
Protective gear, including goggles, gloves, and sturdy footwear. A stiff-bristled broom. A patio cleaning solution (optional, for stubborn stains).
Additionally, ensure you have a proper water supply to achieve optimum performance in your cleaning tasks.
2. Prepare the Area
Clear the patio: Remove furniture, plants, and décor.
Sweep away debris: Use a broom to eliminate loose dirt and leaves.
Inspect for damage: Look for cracks or weak jointing material that could worsen during cleaning.
Remove Debris from Patio Joints:
Maintaining the appearance and longevity of your patio starts with keeping the joints clean. Debris like dirt, leaves, and weeds can accumulate in the joints, leading to potential damage to the patio slabs.
To effectively remove debris, use a joint scraper or a garden spatula to gently scrape out the unwanted material. For added ease, a cordless weed remover or a patio cleaner can help loosen and eliminate stubborn debris.
Regularly removing debris from patio joints is essential to prevent the growth of weeds and moss, which can cause further damage. Consistent cleaning not only preserves the structural integrity of your patio but also keeps it looking fresh and inviting, avoiding the need for costly repairs down the line.
3. Adjust the Pressure
Choosing the right pressure setting is crucial: For delicate surfaces like sandstone, set the pressure around 1,500 PSI (pounds per square inch). For durable surfaces like concrete, you can increase the pressure but avoid exceeding 2,500 PSI.
4. Pre-Treat Stubborn Stains
Apply a patio cleaner or a mixture of mild detergent and warm water to particularly dirty areas. Let it sit for 10–15 minutes to loosen tough stains before washing.
5. Start Jet Washing
Hold the nozzle at the right angle: Maintain a distance of 30–50 cm from the surface and keep the nozzle at a 45-degree angle.
Use a sweeping motion: Work in overlapping passes to ensure even cleaning.
Avoid direct pressure on joints: Protect the jointing material by directing water at a slight angle.
Work systematically: Begin at one corner and move across the patio methodically to cover every area.
6. Rinse Thoroughly
Once the cleaning is complete, rinse the patio with clean water to remove any residual detergent or loosened debris.
7. Allow Time to Dry
Let the patio dry naturally for a few hours before replacing furniture or applying a sealant. This ensures a spotless finish.
Post-Cleaning Tips for Long-Lasting Results
Inspect for Missed Spots or Repairs
After cleaning, check for any stubborn stains or damage that may require extra attention.
Consider Applying a Sealant
Sealing your patio provides an extra layer of protection against stains, weather damage, and moss growth. This step is especially beneficial for porous materials like sandstone.
Clean Your Patio Furniture
Before returning furniture to your patio, give it a quick clean to maintain the overall freshness of your space.
Common Mistakes to Avoid When Jet Washing
Even with the best intentions, mistakes can happen. Avoid these pitfalls to protect your patio:
- Using Too Much Pressure: This can erode delicate surfaces or dislodge grout.
- Ignoring the Weather: Avoid cleaning on very hot or freezing days, as extreme temperatures can affect cleaning solutions and drying times.
- Skipping Safety Gear: Always wear goggles and gloves to protect yourself from flying debris.
How to Protect Your Patio During Jet Washing
To avoid damage during jet washing, take these precautions:
- Shield nearby plants: Cover surrounding foliage with tarps or plastic sheets to protect them from overspray and cleaning chemicals.
- Test first: Before jet washing the entire patio, test on a small, hidden area to ensure the pressure setting is suitable for your surface.
- Mind the grout: Excessive pressure can erode jointing material, so focus on the slabs rather than the gaps between them.
Dealing with Tough Stains
If certain stains remain after jet washing, consider these solutions:
Black Spots or Algae: Use a specialised patio cleaner with biocidal properties to break down organic buildup.
Stubborn Stains: Gently scrub the area with a stiff brush before rinsing again with the pressure washer.
Can You Jet Wash Decking?
Yes, you can jet wash decking, but it requires a gentle approach to avoid causing damage. Decking, especially wooden decking, is more delicate than a patio made of stone or concrete. High-pressure water can splinter wood, remove protective sealants, or even gouge the surface if not handled correctly. Here’s how to jet wash decking safely:
Use Low Pressure: Set your pressure washer to a low setting (500–1200 PSI).
Choose the Right Nozzle: Attach a fan or brush nozzle for even, gentle cleaning.
Maintain Distance: Keep the nozzle at least 12–18 inches from the surface.
Work Along the Grain: Clean following the wood grain to prevent splintering.
Inspect and Repair: After cleaning, check for raised fibres or splinters. Sand rough areas and re-seal the decking to enhance durability and maintain its appearance.
Pre-Treat for Stubborn Stains: For moss, algae, or tough stains, apply a deck cleaner or a mixture of mild detergent and water. Let it sit for 10–15 minutes before jet washing.
Which Pressure Washer Is Right for You?
Not all pressure washers are created equal, and selecting the right one is key to achieving the best results. Here’s a quick breakdown:
- Electric Pressure Washers: Ideal for small patios or light cleaning tasks. These are quieter, lighter, and more affordable.
- Gas-Powered Pressure Washers: Perfect for larger patios or heavily soiled surfaces, as they offer higher pressure but require more maintenance.
- Cordless Pressure Washers: Great for portability but usually less powerful.
When choosing a pressure washer, consider the size of your patio, the type of material, and your budget.
Frequently Asked Questions
No. Some materials, like soft sandstone or older paving, maybe too delicate for high-pressure cleaning. Always test on a small area first.
For most patios, once a year is sufficient. In areas prone to moss or heavy rainfall, more frequent cleaning may be necessary.
Not always, but a cleaning solution of equal parts water and vinegar, can help with tough stains or heavy grime buildup.
Why Choose All Clean London for Commercial Jet Washing?
Jet washing can be a time-consuming and delicate task. At All Clean London, we specialise in commercial jet washing services, using the latest equipment to achieve outstanding results without risking damage.
Whether you have a natural stone patio or concrete paving, our team tailors the cleaning process to your surface type for a safe and effective finish.
Transform Your Patio Today
Jet washing a patio is a fantastic way to refresh your outdoor space, but doing it right makes all the difference. By following these steps, you can achieve professional results while protecting your patio’s integrity.
If you’d rather leave it to the experts, All Clean London is here to help. Contact us today for a free quote and let us bring your commercial space back to life.
