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How to Clean Garden Slabs (Expert Guide)

How to Clean Garden Slabs (Expert Guide)

Over time, gardens in the UK naturally bear the marks of the seasons - from winter’s damp moss to summer’s dust and everyday foot traffic.

Your garden slabs, whether they form a patio, pathway or driveway, are constantly exposed to the elements. 

Without proper care, they can lose their brightness and even become slippery underfoot.

Knowing how to clean garden slabs effectively not only restores their appearance but also helps protect your outdoor space from unwanted build-up, ensuring it remains safe, attractive and long-lasting.

At Jeyes Fluid, we’ve been trusted by generations of homeowners since 1877 to keep outdoor spaces hygienically clean. 

With more than 145 years of expertise, we understand what it takes to remove tough grime, eliminate bacteria and refresh hard surfaces without causing damage. 

In this expert guide, we’ll show you step-by-step how to clean your garden slabs safely and efficiently, using proven methods and reliable cleaning solutions.

Why It’s Important to Clean Garden Slabs Regularly

Garden slabs are designed to withstand the British weather, but over time, exposure to rain, frost and organic growth can cause them to deteriorate. 

Moss, algae and lichen thrive in damp conditions, creating unsightly green patches that can make your slabs dangerously slippery when wet. Dirt, leaf debris and pollution also accumulate, dulling the surface and encouraging further grime build-up.

Regularly cleaning your garden slabs does more than just improve their appearance - it helps preserve the material beneath.

By removing biological growth and dirt before it takes hold, you prevent staining, erosion and premature wear. This not only extends the life of your patio or pathway but also makes future cleaning much easier.

There’s also a hygiene benefit. Outdoor surfaces can harbour bacteria, especially in areas where pets roam or food is prepared. A thorough clean helps maintain a safer, more sanitary environment for your family to enjoy year-round.

For homeowners who take pride in their outdoor space, routine cleaning is a simple yet powerful way to protect your investment - keeping garden slabs bright, safe and ready to enjoy in every season.

What You’ll Need to Clean Your Garden Slabs

Before you begin, gathering the right tools and cleaning products will help you achieve a professional finish. Cleaning garden slabs doesn’t need to be complicated - but having the proper equipment ensures the job is thorough, safe and effective.

Essential Tools and Equipment

To clean your slabs efficiently, you’ll need:

  • A stiff outdoor brush or broom - to sweep away debris, leaves, and loose dirt before cleaning.
  • A bucket or watering can - for mixing and applying your cleaning solution.
  • A scrubbing brush - to agitate dirt and algae build-up on the slab surface.
  • Protective gloves and sturdy footwear - to keep your hands and feet safe from splashes.
  • Clean water and a hose - for rinsing after cleaning.

Recommended Jeyes Fluid Outdoor Cleaners

For powerful and reliable results, choose from Jeyes Fluid’s trusted outdoor cleaning range - specially formulated to tackle grime, green growth and bacteria on patios, driveways and slabs:

  1. Multi Use Outdoor Cleaner 5L - a versatile solution ideal for cleaning large areas such as patios, stone paths and concrete slabs.
  2. 4-in-1 Patio & Decking Cleaner 2L - perfect for removing algae, mould and general dirt while brightening surfaces
  3. Driveway & Masonry Sealer - designed for tougher surfaces, helping to lift ingrained dirt and restore natural colour. 

All Jeyes Fluid cleaners are formulated for outdoor use, offering the dependable cleaning strength homeowners have trusted for generations.

Step-by-Step: How to Clean Garden Slabs the Right Way

Cleaning garden slabs properly requires a little preparation, the right cleaning solution, and some attention to detail. Follow these professional steps for long-lasting, hygienic results that bring your patio or pathway back to life.

Step 1 - Sweep and Prepare the Area

Start by removing any furniture, plant pots or decorative items from the area you’re cleaning.

Use a stiff outdoor brush to sweep away loose dirt, leaves and debris. This helps prevent mud forming during cleaning and allows the solution to penetrate evenly across the slab surface.

If you notice any weeds growing between the slabs, take a moment to remove them by hand or with a suitable weeding tool. Preparing the surface properly ensures the cleaner works as efficiently as possible.

Step 2 - Apply Outdoor Cleaner

Next, choose the most suitable Jeyes Fluid product for your surface type and level of soiling.

For general maintenance, use Jeyes Multi Use Outdoor Cleaner. If your slabs are heavily stained or covered in algae, opt for Jeyes 4-in-1 Patio & Decking Cleaner for a deeper clean.

Dilute the solution according to the instructions on the label. Apply it evenly across the slabs using a watering can, garden sprayer or mop. Allow it to sit for several minutes so it can loosen dirt and break down organic matter.

Step 3 - Scrub and Lift Away Dirt

Using a firm-bristled brush, scrub the surface in circular motions to lift away loosened grime.

Pay particular attention to shaded or damp areas where moss and algae tend to thrive. This manual action helps restore the slab’s natural finish without damaging the material.

For stubborn stains or deeply ingrained dirt, reapply a small amount of cleaner and allow it to soak for a little longer before scrubbing again.

Step 4 - Rinse and Allow to Dry

Once you’ve finished scrubbing, thoroughly rinse the entire area with clean water using a hose or watering can. This removes residue and reveals the true colour of your slabs.

Allow the surface to dry completely before walking on it or replacing furniture and planters.

Step 5 - Apply Long-Term Protection (Optional)

For lasting results, consider applying a protective sealer once your slabs are fully clean and dry. A product such as Jeyes Masonry & Driveway Sealer helps reduce future staining and makes ongoing maintenance easier by creating a water-resistant barrier.

Regular cleaning followed by protection ensures your garden slabs remain brighter, cleaner and safer for longer.

Removing Tough Stains, Moss and Algae from Garden Slabs

Even with regular cleaning, some areas of your garden slabs can develop stubborn marks or green growth - especially in shaded or damp corners where moisture lingers.

Tackling these effectively requires the right cleaner and a little patience, but the results are well worth the effort.

Removing Moss and Algae

Moss and algae are common in the UK’s damp climate and can make slabs dangerously slippery. To remove them, start by brushing away as much growth as possible using a stiff broom. Then apply a disinfecting outdoor cleaner such as the Classic Outdoor Disinfectant 5L.

This powerful formula kills bacteria and helps break down organic deposits, ensuring your slabs are not only visibly cleaner but also hygienically safe. For large patio areas, use a watering can or garden sprayer for even coverage. Leave it to work for the time specified on the label before rinsing thoroughly with clean water.

Treating Stubborn Dirt and Stains

If your slabs are stained from foot traffic, fallen leaves or garden equipment, the 4-in-1 Patio & Decking Cleaner 4L is ideal for deep cleaning. Its advanced formula helps lift stubborn grime and restores the natural appearance of stone, concrete, and paving.

Apply it to affected areas, scrub gently with a brush and allow it to sit briefly before rinsing. Repeated treatment may be needed for particularly ingrained marks, but the product’s fast-acting cleaning agents will make visible improvements even after one use.

Maintaining a Hygienic Finish

Once stains and organic growth have been removed, maintaining a hygienic finish is straightforward with occasional light cleaning.

Regular use of a mild outdoor cleaner keeps bacteria and green build-up at bay, ensuring your slabs stay fresh and safe to walk on throughout the year.

By combining disinfecting power with expert outdoor care, Jeyes Fluid products provide lasting protection against the elements.

Preventing Dirt and Algae Build-Up on Slabs

Once your garden slabs are thoroughly clean, a few simple maintenance steps can help keep them looking their best for longer.

Preventing the return of dirt, moss and algae is much easier than tackling a full deep clean; regular upkeep also helps protect the integrity of your slabs.

1. Sweep Regularly

A quick sweep once or twice a week removes leaves, soil and organic debris that can trap moisture and encourage green growth. Keeping the surface clear helps stop algae from developing and maintains good drainage across your patio or path.

2. Rinse After Rain or Barbecues

Rainwater often carries dirt, pollen and dust, while outdoor cooking can leave behind greasy residue. A light rinse with clean water after rainfall or social gatherings helps prevent stains and keeps the surface fresh between deeper cleans.

3. Use a Surface Protector

To give your slabs long-term defence against water and staining, apply a sealing product such as the Jeyes Masonry Driveway Sealer 5L. This creates a protective layer that reduces moisture absorption, making it harder for algae and moss to take hold. It also enhances colour vibrancy and makes future cleaning quicker and easier.

4. Clean Seasonally

Even with regular maintenance, a full clean at the start and end of each year helps prevent build-up and keeps your outdoor space looking its best through every season.

Use a gentle outdoor cleaner in spring and autumn to refresh the slabs and protect them ahead of winter’s damp conditions.

By combining preventative care with the power of trusted Jeyes Fluid products, you can enjoy clean, safe and beautiful garden slabs year-round - with less effort and greater long-term protection.

Safety Tips

While cleaning your garden slabs is a straightforward task, it’s important to follow a few essential safety steps to protect yourself, your garden and any surrounding plants or pets.

Jeyes Fluid products are formulated for outdoor use and deliver powerful cleaning performance when used responsibly.

1. Always Wear Protective Gear

Before starting, put on protective gloves and sturdy footwear. Outdoor cleaners are designed to cut through dirt and grime effectively, so direct skin contact should be avoided.

Eye protection is also advisable when applying or scrubbing cleaning
solutions, particularly on windy days.

2. Follow Dilution and Usage Instructions

Each Jeyes Fluid product has specific dilution ratios and contact times to ensure optimal results.

Always read the label carefully before use and never exceed recommended concentrations; stronger does not mean better, and correct dilution ensures safe, effective cleaning.

3. Keep Children and Pets Away During Cleaning

For safety, keep pets and children indoors or away from the area until the surface is completely dry.

This ensures they don’t come into contact with the cleaning solution
during or immediately after application.

4. Avoid Runoff into Drains or Water Features

When rinsing, try to direct the flow of water away from garden ponds, natural waterways or storm drains.

This helps prevent cleaning residue from entering aquatic environments.

5. Store Products Safely

After use, store your Jeyes Fluid cleaning products in a cool, dry place - securely closed and out of reach of children or pets.

Proper storage helps maintain product integrity and ensures safe use every time.

By following these simple precautions, you can clean your garden slabs confidently and safely, achieving the spotless results Jeyes Fluid has been trusted to deliver for over 145 years.

Why Choose Jeyes Fluid for Outdoor Cleaning

When it comes to cleaning outdoor surfaces, few names carry as much trust and history as Jeyes Fluid. Since 1877, we’ve been the go-to choice for homeowners across the UK who want reliable, effective cleaning products designed specifically for the challenges of outdoor living.

Experience That Speaks for Itself

With more than 145 years of experience, Jeyes Fluid has built a reputation for creating high-performance cleaning solutions that truly deliver. Our products are formulated to tackle dirt, grime and bacteria on patios, paths, driveways and garden slabs - keeping them looking their best in every season.

Trusted by Generations

From disinfecting patios to refreshing garden furniture, Jeyes Fluid has been part of homes for generations. Homeowners know they can depend on our products for consistent, powerful cleaning results without unnecessary harshness or complexity.

Safe, Reliable and Effective

Every product in our outdoor cleaning range is designed with both performance and safety in mind - helping you achieve a cleaner, fresher and more hygienic outdoor space with confidence.

Whether you’re restoring your patio or maintaining your driveway, discover the
complete collection of trusted solutions in our Outdoor Cleaner Collection.

You Are Set

By following the expert steps in this guide, you’ll know exactly how to clean garden slabs the correct way and maintain them for the long term.

Whether you’re tackling seasonal grime, algae growth or simply giving your patio a fresh start, Jeyes Fluid offers trusted, proven solutions for every outdoor cleaning challenge.

Explore our Garden Essentials Bundle for a convenient way to keep all your outdoor cleaning products in one place, or use our Find a Stockist page to locate your nearest retailer.

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