Jet Washing & Pressure Washing: The Complete UK Guide
Everything you need to know before you clean a driveway, patio, deck or building exterior — how jet washing works, which surfaces need a softer touch, what it costs in 2026, how often to do it, and how to stay safe and legal.
- ★ 4.5/5 · 3,080+ reviews
- £1M insured
- Vetted local teams
- Eco-conscious
- Nationwide UK
Quick answer: what is jet washing and what does it cost?
Jet washing (also called pressure or power washing) uses a high-pressure water spray to remove dirt, moss, algae, weeds and stains from hard outdoor surfaces. In the UK in 2026, professional cleaning typically costs £2–£8 per square metre — roughly £150–£350 for a patio and £100–£450 for a driveway. Delicate surfaces like roofs and render should be soft washed (low pressure plus a cleaning solution) instead, and block paving usually needs re-sanding afterwards.
What this guide covers
- What is jet washing?
- Pressure washing vs soft washing
- Which method for which surface
- PSI, GPM & nozzles explained
- Block paving, re-sanding & sealing
- How a professional clean works
- How much it costs (2026)
- How often to jet wash
- Safety & the risks
- The legal & environmental rules
- DIY vs professional
- FAQs
What is jet washing?
Jet washing, pressure washing and power washing all describe the same idea: water forced through a machine and out of a narrow nozzle at high pressure to blast dirt off a surface. (Strictly, “power washing” uses heated water, which helps with grease and stubborn grime, but the terms are used interchangeably.) It’s the fastest way to lift moss, algae, lichen, weeds and ground-in dirt from driveways, patios, paths and walls.
Two numbers describe how a machine cleans:
- PSI (pounds per square inch) is the force of the water — the “hit” that breaks the bond between dirt and the surface.
- GPM (gallons/litres per minute) is the flow — the volume of water that rinses the loosened dirt away.
Real cleaning power is the two combined, which is why a professional machine (often around 200 bar / ~2,900 PSI with a high flow rate and a rotary surface cleaner) clears a driveway far faster and more evenly than a domestic machine, which is typically 100–130 bar (around 1,450–1,900 PSI). More pressure isn’t always better, though — on the wrong surface it does real damage, which is where soft washing comes in.
Pressure washing vs soft washing: what’s the difference?
The single most important decision in exterior cleaning is choosing the right method for the surface. Use the wrong one and you can strip render, crack tiles or force water where it shouldn’t go.
| Pressure / jet washing | Soft washing | |
|---|---|---|
| How it works | High-pressure water blasts dirt off | Low pressure + a cleaning solution that does the work |
| Pressure | ~1,300–3,000 PSI | under 500 PSI |
| Best for | Concrete, block paving, patios, paths, brick | Roofs, render, cladding, painted & delicate surfaces |
| On algae & moss | Removes the surface layer | Kills growth at the root, so it stays cleaner longer |
| How long results last | Until growth returns | Often 6–12 months or more |
| Main risk | Damaging soft surfaces if misused | Needs correct chemical handling & plant protection |
In practice the two are often used together on the same visit — pressure washing the hard driveway and paths, then soft washing the render, roof or fencing. Soft washing uses a biodegradable solution (typically containing sodium hypochlorite, an algaecide and a surfactant) that’s left to dwell, breaking down organic growth before a gentle rinse.
Which method for which surface
A quick reference for the surfaces we’re asked about most. When in doubt, a professional tests a small area first.
| Surface | Recommended approach | Notes |
|---|---|---|
| Concrete driveway / path | High pressure + surface cleaner | Durable; takes the most pressure |
| Block paving | High pressure, then re-sand | Washing removes joint sand — must be replaced |
| Patio slabs / porcelain | Medium–high pressure | Even, streak-free passes |
| Natural stone / Indian sandstone | Careful medium pressure | Porous — benefits from sealing afterwards |
| Tarmac / asphalt | Low pressure / soft wash | High pressure scars the surface |
| Resin-bound | Gentle wash / soft brush | Never high pressure — it damages the resin |
| Timber & composite decking | Low–medium, with the grain | Too much pressure splinters timber |
| Brick walls | Low pressure / soft wash | Protects mortar joints |
| Render (K-Rend, monocouche), cladding | Soft wash only | Pressure strips render & forces water behind it |
| Roof tiles & shingles | Soft wash only | Pressure dislodges granules / cracks tiles |
PSI, GPM & nozzles explained
Nozzles control the spray pattern and therefore the pressure hitting the surface. They’re colour-coded — and choosing wrong is how surfaces get damaged.
| Nozzle | Angle | Use |
|---|---|---|
| Red | 0° | Pinpoint jet — never used on surfaces; far too aggressive |
| Yellow | 15° | Heavy-duty stripping and stubborn concrete stains |
| Green | 25° | The safe all-rounder for driveways, paths and patios |
| White | 40° | Gentle rinsing for delicate surfaces and washing down |
| Black | 65° | Low-pressure soap/detergent application |
| Turbo / rotary | spinning 0° | High-impact rotating jet — clears concrete much faster |
Rule of thumb: wood and fences clean at roughly 500–1,500 PSI, render and roofs need soft washing under 500 PSI, while concrete and block paving handle 2,500–3,000 PSI. Professionals start gentle, test, and only increase pressure if needed.
Block paving: re-sanding & sealing
Block paving is the one surface that almost always needs an extra step. The high-pressure water that cleans the blocks also washes the kiln-dried sand out of the joints. That sand is what locks the blocks together and helps keep weeds out, so it has to be brushed back in afterwards. A clean that skips re-sanding can leave blocks loose and weeds returning fast.
Sealing is an optional finishing step. Applied after cleaning and re-sanding, a sealant helps lock in the joint sand, inhibits weed and algae regrowth, protects against oil stains and makes future cleans easier. It’s especially worthwhile on porous materials like Indian sandstone; on dense, non-porous surfaces it may not be necessary. Re-sanding typically adds around £1.50–£2.50 per m², and sealing around £6–£12 per m².
How a professional jet washing job works
A proper clean is more than pointing a lance at the ground — preparation and pre-treatment are what make results even and long-lasting.
Assess & protect
The operator checks the surface and condition, clears loose debris and protects nearby plants, doors and walls.
Pre-treat
A biocide, weed killer or degreaser is applied to break down moss, algae and oil at the root before washing.
Wash
The surface is cleaned at the correct pressure — usually with a rotary surface cleaner for an even, streak-free finish.
Finish
Block paving is re-sanded (and sealed if chosen), the area is rinsed down and the dirty water is cleared away responsibly.
How much does jet washing cost in 2026?
UK prices depend on surface, size, condition, access and any extras like re-sanding or sealing. Most professionals quote per square metre or per job.
| Job | Typical UK price | Notes |
|---|---|---|
| Patio | £150–£350 | Small ~£60–£100; large up to ~£400 |
| Driveway | £100–£450 | Medium (~60m²) often £150–£250 |
| Paths & steps / small areas | from ~£45 | Subject to a minimum call-out |
| Walls (per wall) | £250–£400 | Around £10–£16 per m² |
| Roof (soft wash) | £600–£1,200 | Terraced → detached |
| General rate | £2–£8 / m² | £3–£6/m² is common |
What affects the price
- Condition: heavy moss, weeds or oil stains need pre-treatment and add roughly £50–£100.
- Extras: re-sanding (£1.50–£2.50/m²), sealing (£6–£12/m²), oil/stain removal (£50–£200).
- Surface: block paving and natural stone cost more than plain concrete because of the care and re-sanding involved.
- Location: London and the South East typically run £45–£100 more than northern and rural areas.
- Minimum call-out: small jobs often carry a £40–£80 minimum.
- Bundling: doing the patio, driveway and paths together usually saves 10–20% versus separate visits.
How often should you jet wash?
For most homes, once a year keeps driveways, patios and paths free of the moss and algae that build up in the UK’s damp climate. Shaded, north-facing or tree-covered areas green up faster and may need a clean every six to twelve months. A soft wash, because it kills growth at the root rather than just removing the surface, generally stays clean noticeably longer than a plain pressure wash.
Spring and early summer are the busiest (and best) times — clearing winter’s build-up before the garden season. It’s also worth a clean before a property sale, after building work, or whenever paving starts to feel slippery underfoot.
Safety & the risks
A pressure washer is a powerful tool, and the risks are easy to underestimate. The water jet can cause serious “fluid-injection” injuries — it abrades skin layer by layer and, at close range, can cut through footwear or penetrate the body, carrying dirt and bacteria with it. Hot-water and steam machines add a burn risk. Other hazards include eye injuries from flying debris, electric shock from damaged equipment in wet conditions, and slips on wet surfaces.
Never point the lance at people or pets, even for a moment, and never let children use the machine. Injection injuries can look minor but be severe, so any high-pressure water injury should be treated as a medical emergency.
Professionals follow recognised safety practice (the Water Jetting Association runs accredited training, and workplaces are covered by HSE regulations such as PUWER, PPE and COSHH for chemical handling). Basic precautions include eye and ear protection, gloves, sturdy footwear, two hands on the wand at all times, and keeping the machine well maintained.
The legal & environmental rules (UK)
There’s no specific licence required to carry out pressure washing in the UK — but there are real rules about where the dirty water goes, and they catch out plenty of DIYers and even some traders.
Most properties have a separate drainage system: surface-water drains carry rainwater straight to rivers, streams and the sea, while foul sewers go to treatment works. Allowing wash water that contains detergents, oil or cleaning chemicals to run into surface-water drains is a pollution offence and can lead to investigation and fines from the local council or environmental regulator (the Environment Agency in England, SEPA in Scotland). Even small volumes, and even diluted by rain, can breach the rules.
Good practice: use biodegradable products, contain or redirect runoff away from surface drains, work from the lowest point upward on slopes, and avoid washing in heavy rain or strong wind. A professional operator should already plan for all of this — it’s part of doing the job responsibly.
For commercial work, discharging wash water to the foul sewer can require trade-effluent consent from the local water company, and cleaning public pavements or communal areas may need council approval.
DIY vs hiring a professional
A domestic machine and a single patio in good condition can be a sensible DIY job. Beyond that, the maths often favours a professional.
Equipment power
Commercial machines run far higher flow rates and surface cleaners for a faster, more even finish.
The right method
Pros match pressure and technique to each surface — avoiding the streaks and etching that DIY often causes.
The extras
Pre-treatment, re-sanding, sealing and safe runoff handling are built into a professional job.
Insurance
An insured, vetted operator carries the risk — not you — if something goes wrong.
Renting a machine costs around £30–£60 a day, but factor in your time, the risk of surface damage that’s expensive to put right, and the cost of re-sand/seal materials before assuming DIY is cheaper. Hello Services jet washing connects you with vetted, insured local operators nationwide, with a fixed quote before you book.
Common mistakes to avoid
Jet washing FAQs
Will jet washing damage my surfaces?
Not when the method matches the surface. Hard surfaces like concrete and block paving take high pressure well, but render, roofs, tarmac and resin need a low-pressure soft wash. Misjudging this is the main cause of damage, which is why testing a small area first matters.
How much does it cost to jet wash a driveway or patio?
In 2026, expect roughly £2–£8 per square metre. A typical patio is £150–£350 and a driveway £100–£450, depending on size, surface, condition and extras like re-sanding or sealing.
Do you re-sand block paving afterwards?
Yes. Washing removes the kiln-dried sand from the joints, so it’s brushed back in to keep the blocks stable and help suppress weeds. Always check a quote includes re-sanding for block paving.
Can you pressure wash a roof or rendered wall?
These should be soft washed, not pressure washed. High pressure can dislodge roof granules, crack tiles, strip render and force water behind surfaces. A low-pressure cleaning solution clears algae safely and lasts longer.
How often should I have surfaces cleaned?
Once a year suits most driveways, patios and paths. Shaded or north-facing areas that green up quickly may need cleaning every six to twelve months.
How long do the results last?
A pressure wash lasts until growth returns; a soft wash, which kills algae and moss at the root, typically stays clean for six to twelve months or more. Sealing block paving or porous stone extends results further.
Do I need to be home, and what’s needed on site?
You don’t have to be home as long as the operator can reach the area and use an outdoor tap and a power supply. We confirm exactly what’s needed when the booking is arranged.
Is jet washing bad for the environment?
It’s fine when done responsibly. The key is keeping chemical-laden runoff out of surface-water drains and using biodegradable products. UK rules treat polluting runoff as an offence, so a professional plans for this as part of the job.
Do I need a licence to pressure wash in the UK?
No specific licence is required for domestic work, but professionals must follow health-and-safety and environmental rules, and cleaning public or commercial spaces can need council approval or trade-effluent consent.
Can jet washing be combined with other cleaning?
Yes — it pairs well with an after builders clean, a deep clean or end of tenancy cleaning, and bundling usually saves money.
Sources & further reading
- MyJobQuote — Pressure washing cost guide (UK 2026)
- Checkatrade — Driveway cleaning cost 2026
- MyBuilder — Driveway pressure washing cost guide
- Same Day Jet Wash — Patio cleaning cost UK 2026
- Nutech Cleaning — Soft washing vs pressure washing
- Giraffe Tools — Pressure washer nozzle & PSI guide
- Angi — What is a good PSI for a pressure washer?
- Water Jetting Association — Safe pressure washing & injury risks
- NetRegs — Pollution prevention guidance (GPP 13)
- Surrey Pressure Clean — Do you need a licence to pressure wash in the UK?
- HSE — Health & Safety Executive (PUWER, PPE, COSHH)
Prices, pressures and frequencies are general 2026 UK guidance aggregated from the sources above and vary by surface, size, condition, location and provider; always obtain a fixed quote and follow manufacturer and surface-specific guidance. Environmental and safety information is summarised from UK regulators and industry bodies. Accurate at the time of writing (June 2026).