If your patio is looking green with algae, dark with dirt, or sprouting weeds between the slabs, youโve probably thought about getting it jet washed. But is it actually a good idea to jet wash a patio?
The short answer is: yes, jet washing can be one of the best ways to clean a patioโbut only if itโs done correctly, with the right pressure and technique. If done poorly, jet washing can damage paving, wash away jointing, and even shorten the life of your patio.
This guide explores the pros, cons, alternatives, and costs of jet washing patios in the UK, so you can decide if itโs the right option for your garden.
What Is Jet Washing?
Jet washing (also called pressure washing) involves using a machine that pumps water at high pressure to blast away dirt, moss, algae, lichen, and weeds. In the UK, many homeowners hire a professional service, while others choose to buy or hire a machine and do it themselves.
Types of Machines:
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Domestic electric jet washers: ยฃ100โยฃ300.
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Petrol-powered washers: ยฃ400โยฃ1,000+.
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Professional commercial washers: ยฃ2,000โยฃ4,000.
Domestic models are fine for light cleaning, but professionals use much more powerful machines that cut through heavy dirt in a fraction of the time.
Benefits of Jet Washing a Patio
There are many reasons why jet washing is the go-to cleaning method for patios in the UK.
| Benefit | Why It Matters |
|---|---|
| Restores appearance | Removes algae, moss, stains, and restores the patioโs natural colour. |
| Safety | Eliminates slippery algae and moss that cause accidents. |
| Fast results | A dirty patio can look brand new in a few hours. |
| Low chemical use | Often just water pressure is enough, reducing chemical reliance. |
| Increases longevity | Removes damaging moss and weeds that can weaken paving over time. |
| Boosts property value | Clean outdoor areas improve curb appeal for buyers. |
Example: A 30mยฒ sandstone patio in Birmingham can go from dark green to golden and fresh in a 3-hour jet washing session costing around ยฃ180โยฃ220.
Risks of Jet Washing a Patio
Despite the benefits, jet washing isnโt always risk-free.
| Risk | Explanation |
|---|---|
| Jointing damage | The force of the water can wash out sand or mortar between paving slabs. |
| Surface erosion | Soft stones (like sandstone or limestone) can wear away under high pressure. |
| Water ingress | For older patios, water can seep into cracks and cause frost damage later. |
| Weed regrowth | Jet washing removes visible weeds, but roots often remain, meaning they grow back. |
| Uneven finish | Using the wrong nozzle or technique can leave streaks or โtiger stripes.โ |
This is why techniqueโand sometimes professional helpโmatters.
Should You DIY or Hire a Professional?
Many homeowners wonder whether to jet wash their own patio or pay someone else. Both options have pros and cons.
| Factor | DIY Jet Washing | Professional Jet Washing |
|---|---|---|
| Cost | ยฃ40โยฃ70 (hire machine) or ยฃ100โยฃ300 (buy machine). | ยฃ100โยฃ350 depending on patio size. |
| Time | 3โ6 hours for an average patio. | 2โ4 hours (you donโt do the work). |
| Power | Domestic machines weaker (may struggle with heavy dirt). | Commercial-grade machines (better results). |
| Risk of damage | Higher, especially for soft stone. | Lower, insured professionals know correct settings. |
| Finish quality | Variableโdepends on your technique. | Consistently professional standard. |
When DIY Makes Sense:
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Small patios (under 20mยฒ).
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You already own a jet washer.
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Light dirt and minimal moss.
When to Hire a Professional:
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Large patios or driveways.
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Expensive or delicate stone (e.g., sandstone).
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Heavy moss, weeds, or lichen.
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You want sealing or re-sanding included.
How Much Does Jet Washing a Patio Cost in the UK?
The cost depends on patio size, condition, and location.
| Patio Size | Area (mยฒ) | Typical Cost (ยฃ) |
|---|---|---|
| Small patio | Up to 20mยฒ | ยฃ100โยฃ150 |
| Medium patio | 20โ40mยฒ | ยฃ150โยฃ250 |
| Large patio | 40โ60mยฒ | ยฃ250โยฃ350 |
| Very large patio | 60mยฒ+ | ยฃ350+ |
Additional services often add to the cost:
| Add-On Service | Typical Extra Cost |
|---|---|
| Re-sanding block paving | ยฃ50โยฃ100 |
| Sealing patio (protective coat) | ยฃ5โยฃ10 per mยฒ |
| Weed/chemical treatment | ยฃ20โยฃ50 |
| Stain removal (oil, rust, lichen) | ยฃ20โยฃ100 |
๐ก Tip: Expect to pay ยฃ3โยฃ5 per mยฒ for professional cleaning, depending on your region.
Which Patio Materials Can Be Jet Washed Safely?
Not all surfaces respond the same way to jet washing.
| Patio Material | Jet Washing Suitability | Notes |
|---|---|---|
| Concrete slabs | Very good | Durable, responds well. |
| Block paving | Good with care | Needs re-sanding after. |
| Sandstone | Fair | Use lower pressure to avoid erosion. |
| Limestone | Fair | Can be damagedโuse carefully. |
| Porcelain tiles | Very good | Non-porous, easy to clean. |
| Decking (wood) | Poor | Needs low pressure to avoid splintering. |
If in doubt, test a small hidden area before jet washing the entire patio.
Alternatives to Jet Washing
If youโre worried about damage, there are alternative patio cleaning methods.
| Method | Pros | Cons | Cost (UK) |
|---|---|---|---|
| Scrubbing with brush & detergent | Cheap, safe on all surfaces. | Hard work, time-consuming. | ยฃ20โยฃ40 (supplies). |
| Chemical patio cleaner | Kills moss, algae, weeds. | Harsh chemicals can damage plants. | ยฃ10โยฃ30. |
| Steam cleaning | Gentle, eco-friendly. | Fewer companies offer it, costs more. | ยฃ6โยฃ10 per mยฒ. |
| Sandblasting | Effective on very tough stains. | Too aggressive for delicate patios. | ยฃ8โยฃ12 per mยฒ. |
Jet washing remains the fastest and most popular option, but these alternatives suit fragile or historic patios.
How Often Should You Jet Wash a Patio?
Most UK homeowners jet wash their patio every 1โ2 years.
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High-use patios (lots of foot traffic, shaded areas with moss) โ every year.
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Low-use patios (sunny areas, little dirt build-up) โ every 2โ3 years.
In between, light brushing and weed control can keep it looking good without constant blasting.
Environmental Considerations
Jet washing uses a lot of waterโsometimes 200โ300 litres per hour with professional machines. While this is similar to a long shower, itโs worth considering in times of water restrictions.
Tips to reduce environmental impact:
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Use biodegradable cleaners instead of bleach.
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Sweep regularly to prevent heavy moss build-up.
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Collect wastewater if near drains or sensitive areas.
Professional firms often use eco-friendly detergents, but check before booking.
Expert Tips for Safer Jet Washing
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Always start with a low pressure and increase gradually.
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Keep the lance at least 20โ30cm from the surface.
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Use a fan nozzle, not a pin jet, for even cleaning.
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Work in consistent strokes to avoid striping.
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Re-sand block paving joints after cleaning.
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Apply a sealer if you want longer-lasting results.
Final Verdict: Should You Jet Wash a Patio?
For most patios in the UK, the answer is yesโjet washing is an effective, fast, and affordable way to restore appearance and safety.
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Best option: Hire a professional if your patio is large, delicate, or heavily soiled.
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DIY option: Suitable for smaller patios if you have the equipment and time.
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Avoid: Jet washing fragile surfaces like decking or old limestone at high pressure.
When done properly, jet washing can extend the life of your patio, improve curb appeal, and make your outdoor space more enjoyableโall for a fraction of the cost of replacing the paving.
โ Key takeaway: Jet washing is safe and worthwhile for most patios, but it should be done with the right pressure, care, and aftercare (such as re-sanding or sealing). Expect to pay ยฃ3โยฃ5 per mยฒ for professional results in the UK.
Seasonal Timing: When Is the Best Time to Jet Wash a Patio?
In the UK, the timing of your patio clean can make a big difference:
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Spring (MarchโMay): The most popular time. People want patios looking fresh for summer. Demand is high, so prices are rarely discounted.
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Summer (JuneโAugust): Warm weather speeds up drying, but long sunny days mean moss and algae may regrow faster.
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Autumn (SeptemberโNovember): A good time to remove leaf stains before winter. You may find cheaper rates as demand slows.
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Winter (DecemberโFebruary): Less common due to cold weather and frost. Some contractors pause outdoor work.
| Season | Pros | Cons |
|---|---|---|
| Spring | Patio ready for summer | High demand, higher cost |
| Summer | Warm, fast drying | Risk of regrowth, UV fading |
| Autumn | Cheaper rates, prep for winter | Wetter weather, slippery surfaces |
| Winter | Lowest demand | Frost risk, fewer contractors available |
๐ก Tip: Book in early spring or late autumn for the best balance of price and effectiveness.
How Jet Washing Compares to Other Patio Maintenance
Cleaning is just one part of patio upkeep. Letโs compare jet washing to other common maintenance tasks.
| Maintenance Task | Frequency | Cost (UK) | Purpose |
|---|---|---|---|
| Jet washing | Every 1โ2 years | ยฃ150โยฃ250 average | Removes dirt, moss, algae |
| Weeding | Every 2โ3 months | ยฃ10โยฃ20 (DIY chemicals) | Stops weeds overtaking patio |
| Re-sanding joints | Every 2โ3 years | ยฃ50โยฃ100 | Keeps block paving stable |
| Sealing | Every 2โ3 years | ยฃ5โยฃ10 per mยฒ | Protects surface, reduces regrowth |
| Replacing slabs | 10โ20 years | ยฃ20โยฃ40 per slab | Repairs cracks or uneven areas |
A well-kept patio isnโt just about blasting dirtโitโs about combining jet washing with preventative care.
Common Mistakes People Make When Jet Washing Patios
Jet washing seems simple, but mistakes can cause expensive damage. Here are the most common errors:
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Using maximum pressure โ Can erode soft stone or blast out jointing.
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Wrong nozzle โ A pin jet creates unsightly streaks (โtiger stripesโ).
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No re-sanding โ On block paving, this leads to shifting and weed growth.
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Too close to the surface โ Leaves gouges or etches in paving.
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Ignoring drainage โ Dirty water can flood lawns or flowerbeds.
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Not wearing PPE โ High-pressure water can injure skin.
Avoid these by reading the machine manual, starting with low pressure, and using slow, even passes.
How Jet Washing Affects Patio Lifespan
When done properly, jet washing can extend your patioโs life. But if done incorrectly, it can shorten it.
| Effect | Outcome |
|---|---|
| Removes moss & algae | Prevents damage caused by roots and dampness. |
| Cleans joints | Makes it easier to reapply sand, strengthening paving. |
| Strips protective seal | If too harsh, removes coatings, leaving stone vulnerable. |
| Erodes soft stone | Over time, excessive washing can thin surfaces. |
On balance, most patios benefit from occasional jet washing, especially if combined with sealing to reduce erosion.
How to Prepare Your Patio for Jet Washing
Good preparation makes the job quicker, cleaner, and more effective.
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Clear the area โ Remove furniture, pots, BBQs, and ornaments.
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Sweep debris โ Loose leaves and soil just clog drains.
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Protect plants โ Cover nearby flowerbeds if using detergents.
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Check drainage โ Ensure water has somewhere to flow.
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Apply weed killer (optional) โ A week before, treat weeds so roots are weakened.
Preparation reduces mess and ensures the pressure washer is blasting dirt, not shifting garden furniture.