Should You Jet Wash a Patio in the UK?

Written by PureSeal Services on October 1, 2025. Posted in Blog, Pressure Washing

Maintaining a patio is about more than keeping it looking good. A clean patio is safer, lasts longer, and improves the overall look of your outdoor space. One of the most popular methods homeowners use to clean patios is jet washing (sometimes called power washing or pressure washing). But is it always the right choice? In this article, we’ll explore whether you should jet wash a patio, the pros and cons, cost comparisons, alternative cleaning methods, and some tips to get the best results.

1. What is Jet Washing?

Jet washing involves using a machine that sprays water at high pressure to blast away dirt, moss, algae, stains, and general build-up from hard surfaces such as patios, driveways, and decking.

Pressure levels: Most domestic jet washers operate between 100–150 bar, while professional machines can exceed 200 bar.
Surfaces: Popular for block paving, natural stone, concrete slabs, and even decking (with care).

Key point: Jet washing relies on water pressure rather than scrubbing or harsh chemicals, though detergents can be added for tough jobs.

2. The Benefits of Jet Washing a Patio

Benefit	Why It Matters
Quick and effective	Removes years of dirt and moss in hours.
Restores appearance	Can make a weathered patio look brand new.
Low chemical use	Often just water, reducing chemical reliance.
Prevents slip hazards	Algae and moss can be dangerously slippery.
Increases property appeal	Clean outdoor spaces add kerb appeal and value.

Jet washing is especially effective if you’re preparing for summer use, planning to host guests, or thinking of selling your property.

3. The Drawbacks of Jet Washing

Jet washing has plenty of positives, but it’s not always the best option for every situation.

Drawback	Explanation
Can damage surfaces	High pressure can erode mortar, grout, or even chip softer stones.
Weed regrowth	Washing removes moss/weeds but doesn’t kill roots — they’ll return quickly.
Water usage	Uses up to 500 litres per hour, which can be costly.
Messy process	Dirt, debris, and water can splash onto walls, doors, or windows.
Noise and disruption	Jet washers are loud and can disturb neighbours.

4. Cost of Jet Washing a Patio

Costs vary depending on whether you do it yourself or hire a professional.

DIY Costs

Item	Cost (£)
Domestic jet washer (purchase)	£80 – £300
Jet washer (day hire)	£30 – £60 per day
Water cost (approx. 1 hr use)	£1 – £2
Patio detergent (optional)	£10 – £20

👉 DIY Total: From as little as £30 (hire) to several hundred pounds if you buy your own equipment.

Professional Costs

Patio Size	Average Price (£)
Small (up to 20m²)	£80 – £100
Medium (20–40m²)	£120 – £180
Large (40m²+)	£200 – £400+

Professional services often include weed treatment and resealing options, which can increase cost but extend the lifespan of your patio.

5. Patio Materials – Is Jet Washing Safe?

Not all patios are equal. The material your patio is made from will affect whether jet washing is a good idea.

Patio Material	Jet Washing Suitability	Notes
Concrete slabs	✅ Safe	Durable and usually fine under pressure.
Block paving	⚠️ With caution	Can wash away sand between blocks; may require re-sanding.
Natural stone (granite, slate, sandstone)	⚠️ Varies	Hard stones (granite) cope well, but softer sandstone can erode.
Tarmac	❌ Not recommended	Pressure will damage the surface.
Decking (wood)	⚠️ Very low pressure only	Can gouge wood if not careful.

Tip: Always test a small, inconspicuous area first to make sure your patio surface won’t be damaged.

6. Alternatives to Jet Washing

If jet washing isn’t suitable for your patio, or you want to avoid the risks, there are alternative cleaning methods:

Method	Pros	Cons
Scrubbing with brush + detergent	Cheap, safe for all surfaces	Time-consuming, physically demanding
Soft washing (low pressure + biocide)	Kills algae/moss, long-lasting	Takes longer to see results
Steam cleaning	Eco-friendly, chemical-free	Expensive equipment/hire
Vinegar or baking soda	Natural, safe	Less effective on heavy dirt
Bleach (sodium hypochlorite)	Very effective at stain removal	Harsh chemical, may discolour stone

7. Environmental Considerations

Jet washing is effective but not always eco-friendly.

Water usage: A domestic jet washer uses around 400–500 litres per hour, which is equivalent to nearly 5–6 full bathtubs.
Chemical runoff: If detergents are used, these can flow into drains and impact local waterways.
Energy: Electric jet washers consume power; petrol models also emit fumes.

Eco tip: Consider using a rainwater butt supply for your washer, or opt for soft washing with biodegradable cleaners.

8. Step-by-Step Guide to Jet Washing a Patio Safely

Preparation
- Remove furniture, pots, and loose items.
- Sweep the patio to get rid of loose debris.
- Cover nearby plants with tarpaulin to protect them from spray/chemicals.
Set Up Machine
- Connect the jet washer to a water supply.
- Choose a medium pressure setting (start low).
- Attach the correct nozzle (fan jet, not pinpoint jet).
Test a Small Area
- Start on a hidden corner to make sure the pressure isn’t too strong.
Begin Cleaning
- Hold the lance at a 45° angle, about 30cm above the surface.
- Work in sections, sweeping methodically.
Apply Detergent (optional)
- For tough algae or stains, apply a patio detergent, leave to dwell, then rinse.
Rinse Thoroughly
- Go over the entire surface to wash away loose debris and detergent.
Post-Cleaning Care
- Allow patio to dry fully.
- Re-sand block paving joints if needed.
- Consider sealing the patio to prevent regrowth and staining.

9. Should You Seal After Jet Washing?

Sealing a patio after jet washing has several benefits:

Prevents algae and weed regrowth
Protects against stains and water penetration
Keeps colour vibrant
Reduces need for frequent jet washing

Sealer Type	Cost (£ per litre)	Coverage	Benefits
Acrylic sealer	£10 – £15	6–10m²/L	Enhances colour, affordable
Polyurethane sealer	£20 – £30	8–12m²/L	Very durable, stain resistant
Natural stone sealer	£25 – £40	8–12m²/L	Breathable, protects delicate surfaces

Sealing is an extra investment, but it extends the life of your patio and reduces the frequency of jet washing.

10. Common Mistakes to Avoid

Using too much pressure and damaging the surface.
Not wearing protective gear (goggles, gloves, boots).
Forgetting to re-sand block paving joints.
Spraying too close to plants, doors, or windows.
Not cleaning evenly, leaving “tiger stripes” on the patio.

11. Is Jet Washing Worth It?

Let’s weigh everything up:

Factor	Jet Washing	Alternatives
Effectiveness	Very high (instant results)	Medium (slower results)
Risk of Damage	Moderate–High	Low
Cost	£30 – £400	£10 – £150
Time Required	Fast	Slower
Eco Impact	High water use	Variable

Verdict: Jet washing is worth it if you want fast, dramatic results and are willing to take care with pressure and surface type. For delicate patios or environmentally conscious homeowners, alternative methods may be better.

12. Conclusion

So, should you jet wash a patio? The answer depends on:

Surface type: Concrete and hard stone are safe, but softer stone and tarmac are not.
Budget and effort: Jet washing saves time but comes with higher costs and risks.
Environmental concerns: It’s water-intensive and may require chemicals.
Your goals: If you want a quick transformation, jet washing delivers. If you prefer gentle, eco-friendly methods, alternatives like soft washing or manual scrubbing may be better.

Final takeaway: Jet washing is an excellent patio cleaning method when used correctly, but it’s not always the best or only option. Always weigh up the risks and consider sealing afterwards for longer-lasting results.

13. Health and Safety Considerations

While jet washing seems straightforward, it does come with health and safety risks that shouldn’t be ignored.

Main hazards include:

Flying debris: Small stones, grout, or bits of moss can shoot up at high speed.
Slippery surfaces: The patio becomes wet and may be more slippery during cleaning.
Electricity risk: Electric jet washers and water don’t always mix — extension leads should be protected.
Physical strain: Holding a jet washer lance for hours can cause fatigue.

Risk	How to Prevent It
Eye injuries	Wear protective goggles
Slips and falls	Use non-slip boots; avoid working in sandals/trainers
Hearing damage	Wear ear defenders if using a petrol jet washer
Electric shocks	Use outdoor-rated extension leads and RCD protection
Back/arm strain	Take breaks, use a washer with adjustable lance

Tip: Never point a jet washer at yourself, pets, or other people. The water pressure can cut skin in extreme cases.

14. Seasonal Timing – When Is the Best Time to Jet Wash a Patio?

Timing matters when it comes to cleaning your patio.

Spring (March–May): The best time to jet wash. Removes winter moss, algae, and dirt, preparing the patio for summer use.
Summer (June–August): Great for keeping on top of stains and BBQ spillages, but avoid very hot days as detergent dries too fast.
Autumn (September–November): Useful for clearing fallen leaves and preventing them from staining the surface.
Winter (December–February): Not ideal. Freezing weather may damage surfaces, and icy runoff can be hazardous.

Season	Pros	Cons
Spring	Ideal for deep cleaning	Can be rainy, causing re-growth of moss
Summer	Quick drying, patio ready for use	Jet washing in peak sun may cause streaks
Autumn	Clears leaves and prep for winter	Wet weather reduces effectiveness
Winter	Clears salt and grime if mild	Dangerous in frost, water freezing risk

Best practice: Aim for a dry spring day with mild temperatures. This ensures quick drying and reduces regrowth.

15. Long-Term Maintenance of a Patio

Jet washing should not be the only form of patio maintenance. To keep your outdoor space looking good and safe long term, consider a full care routine.

Regular Maintenance Checklist

Task	Frequency	Benefit
Sweeping leaves/debris	Weekly	Prevents staining and moss growth
Removing weeds manually	Monthly	Reduces root build-up
Jet washing or scrubbing	1–2 times per year	Deep clean to restore look
Re-sanding block paving joints	After each wash	Prevents movement and weed regrowth
Sealing the surface	Every 2–3 years	Protects from stains and weather damage

Extra Tip: Placing outdoor mats at garden entrances can reduce the amount of dirt tracked onto patios, meaning less frequent heavy cleaning.

16. Final Verdict – Should You Jet Wash a Patio?

After exploring the pros, cons, costs, and alternatives, the answer isn’t one-size-fits-all.

YES – Jet washing is recommended if:
- Your patio is made of durable materials (concrete, granite, strong block paving).
- You want fast, dramatic results.
- You’re prepared to reseal or re-sand afterwards.
- You don’t mind higher water usage.
NO – Avoid jet washing if:
- Your patio is made of soft stone, tarmac, or delicate surfaces.
- You’re concerned about eco impact and water consumption.
- You want long-term prevention of moss/weeds (jet washing doesn’t kill roots).

Decision Factor	Recommendation
Patio durability	Jet washing safe if surface is strong
Budget	DIY jet wash is cheaper than hiring, but both cost more than brushing
Speed	Jet washing is the fastest option
Eco concern	Choose soft washing or manual scrubbing
Long-term protection	Combine jet washing with sealing

Final Word:
Jet washing a patio is one of the most effective ways to restore its look and make it safer. When done carefully and paired with sealing or ongoing maintenance, it offers brilliant results. However, it isn’t always the most eco-friendly or gentle method. Think of jet washing as part of a broader patio care plan rather than a single solution.

Tags: Driveway cleaning, Exterior cleaning, gutter cleaning, Patio cleaning, pressure washing, Roof Cleaning, window cleaning