What Is the Best Way to Clean a Patio?

Written by PureSeal Services on September 15, 2025. Posted in Blog, Pressure Washing

A patio is often the centrepiece of a garden or outdoor living space. It’s where we host barbecues, relax in the sunshine, or simply enjoy a morning coffee. However, patios are exposed to the elements all year round, meaning they accumulate dirt, moss, algae, lichen, and stains. Over time, this can make even the most beautiful patio look tired and neglected.

So, what is the best way to clean a patio? The answer depends on the material (concrete, stone, block paving, etc.), the level of dirt, and whether you prefer a DIY or professional approach. Below, we’ll explore various patio-cleaning methods, compare their effectiveness, costs, and provide step-by-step guidance.

1. Why Cleaning Your Patio Matters

Before diving into cleaning methods, it’s important to understand why patio cleaning is essential:

• Aesthetic appeal – a clean patio enhances the overall look of your home.

• Safety – moss and algae create slippery surfaces, increasing the risk of falls.

• Longevity – dirt and organic growth can degrade surfaces, shortening your patio’s lifespan.

• Property value – a clean, well-maintained patio adds to kerb appeal.

2. Methods of Patio Cleaning

Here are the main methods people use:

2.1 Manual Scrubbing with Brush and Soapy Water

This is the most basic method, often suitable for light dirt.

Steps:

1. Sweep away debris.

2. Mix warm water with washing-up liquid.

3. Scrub using a stiff-bristled brush.

4. Rinse thoroughly with a hose.

Pros:

• Cheap (costs little more than a bottle of washing-up liquid, approx. £2–£3).

• Safe for all surfaces.

• Eco-friendly if mild soap is used.

Cons:

• Labour-intensive.

• Not effective for heavy staining, moss, or algae.

2.2 Pressure Washing

One of the most popular modern methods.

Steps:

1. Sweep the patio first.

2. Use a pressure washer (140–180 bar is recommended).

3. Work in sections, maintaining a consistent spray pattern.

4. Rinse away loosened debris.

Pros:

• Highly effective on dirt, moss, algae, and stains.

• Restores patios quickly.

• Long-lasting results.

Cons:

• Can damage softer surfaces (e.g., sandstone, pointing between paving slabs).

• Higher water usage.

• Requires equipment (buying a pressure washer can cost £100–£400).

2.3 Chemical Patio Cleaners

Specially formulated cleaning solutions that target moss, algae, lichen, and stains.

Types:

• Biocidal cleaners (kill organic growth and prevent regrowth).

• Bleach-based cleaners (quick results but may harm surrounding plants).

Steps:

1. Dilute cleaner as directed.

2. Apply with a watering can or sprayer.

3. Leave for recommended time.

4. Scrub or rinse off.

Pros:

• Effective against stubborn stains and biological growth.

• Prevents regrowth (especially biocides).

• Minimal scrubbing required.

Cons:

• Costs £10–£25 per container (covers approx. 30–40m²).

• Some chemicals may be harmful to plants/pets.

• Slower results compared to pressure washing.

2.4 Natural Solutions (Eco-Friendly Methods)

For those who prefer environmentally conscious options.

Examples:

• Vinegar solution: 1 part vinegar to 1 part water.

• Baking soda paste for spot cleaning.

• Boiling water to kill moss and weeds.

Pros:

• Cheap and eco-friendly.

• Safe for pets and children (with baking soda/boiling water).

Cons:

• Less powerful than commercial cleaners.

• Vinegar can damage limestone/marble surfaces.

2.5 Professional Cleaning Services

For larger patios or deep stains, professionals may be the best choice.

Pros:

• Expertise ensures correct method for your patio type.

• High-grade equipment provides deep cleaning.

• Saves time and effort.

Cons:

• Costs £100–£250 for an average patio (20–40m²).

• May need to rebook yearly for maintenance.

3. Cost Comparison

Here’s a breakdown of approximate costs for different cleaning methods (per 20–40m² patio):

4. Which Method Works Best for Each Surface?

5. Preventing Future Build-Up

Cleaning your patio once is great, but prevention is better.

Tips to maintain cleanliness:

• Regular sweeping: prevents dirt build-up.

• Apply sealant: costs £20–£50 for 5L; protects against stains and algae.

• Use biocidal wash: apply every 6–12 months for long-term prevention.

• Good drainage: ensures water doesn’t pool, reducing algae growth.

• Furniture care: use pads under furniture legs to avoid rust stains.

6. DIY vs. Professional – Which Is Best?

DIY Cleaning is ideal if:

• You have a small patio.

• You own equipment (e.g., pressure washer).

• You’re on a tight budget.

Professional Cleaning is ideal if:

• Your patio is large or heavily stained.

• You’re short on time.

• You want guaranteed results.

7. Case Study Example

Let’s compare a typical UK homeowner with a 25m² block-paved patio.

8. Step-by-Step Guide to the Best Overall Method

For most UK homeowners, the combination of pressure washing followed by a biocidal cleaner is the best method.

Step 1: Sweep & Prepare
Remove debris, weeds, and furniture.

Step 2: Pressure Wash
Work in controlled sections to avoid streaks.

Step 3: Apply Biocidal Cleaner
This prevents regrowth of moss and algae.

Step 4: Re-Sand Joints (for block paving)
Use kiln-dried sand (£5–£10 per bag).

Step 5: Seal (Optional)
Sealant provides longer-lasting protection.

9. FAQs

Q: Can I use bleach to clean my patio?
Yes, but use with caution. It’s cheap and fast but can harm plants and fade coloured paving.

Q: How often should I clean my patio?
At least once a year, ideally in spring, with touch-ups in autumn.

Q: Should I hire professionals every time?
Not necessary—DIY is fine for light cleaning. Hire pros every 2–3 years for deep cleaning.

10. Final Verdict

So, what is the best way to clean a patio?

The ultimate method is:

• Pressure washing to remove dirt and stains.

• Biocidal treatment to kill moss, algae, and prevent regrowth.

• Optional sealing for long-term protection.

This combination offers the best balance of cost, effort, and results.

11. Common Patio Cleaning Mistakes to Avoid

Even with the right tools, homeowners often make errors that damage their patios or reduce the effectiveness of cleaning.

Top mistakes include:

• Using too much pressure: blasting sandstone or block paving can strip away the surface or jointing material.

• Skipping pre-clean preparation: not sweeping or de-weeding first can spread debris around.

• Overusing chemicals: bleach-heavy mixes can discolour stone and harm surrounding plants.

• Not rinsing thoroughly: leftover detergent can leave streaks or residue.

• Ignoring re-sanding: with block paving, failing to refill joints can cause shifting or weed growth.

12. Environmental Considerations

Patio cleaning doesn’t just affect your garden—it impacts the wider environment.

• Water usage: pressure washers use 300–500 litres per hour, so use only as much as needed.

• Chemicals: opt for biodegradable cleaners whenever possible. Biocidal cleaners are often safer for plants compared to bleach.

• Run-off management: avoid letting dirty water drain into flower beds or ponds.

• Natural alternatives: vinegar and baking soda work well, but test first to avoid damaging stone.

Eco-tip: installing a water butt to collect rainwater reduces costs and environmental impact when rinsing patios.

13. Seasonal Patio Cleaning

Your patio faces different challenges depending on the season.

Regular seasonal upkeep means you’ll need fewer deep cleans.

14. Choosing the Right Equipment and Products

With so many patio cleaning products available, it’s easy to feel overwhelmed. Here’s a breakdown of what’s worth buying:

Essential equipment:

• Stiff-bristle outdoor brush (£10–£20).

• Pressure washer (mid-range models £150–£250).

• Protective gloves and goggles (£5–£10).

• Watering can or pump sprayer (£15–£25).

Useful extras:

• Biocidal patio cleaner (5L for £15–£25).

• Kiln-dried sand for block paving (£5–£10 per bag).

• Sealant (5L for £20–£50 depending on type).

Buying tip: Look for concentrated formulas—they last longer and reduce plastic use.

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