Outdoor areas such as driveways and patios see a lot of footfall over the years, so it's no wonder they get a bit grubby from time to time. When left untreated, algae, mould, moss and mildew can grow, which could damage the area, not to mention any stains that appear over time.
Luckily, most block pavers can be cleaned with ease to ensure longevity. So, if you’re looking for advice and help on the best way to clean your block-paving driveway or patio, look no further.
In this guide, we explore seven tried and tested methods for keeping your outdoor areas free from vegetation, stubborn stains and debris. Ensuring they're presentable and well-kept for years to come.
Why should I clean block paving?
Maintaining a clean block paving surface is essential for several reasons. Firstly, it prolongs the longevity of your driveway or patio, ensuring it remains an attractive feature of your property. Regular cleaning prevents the build-up of debris, tyre marks and dirt.
Also, removing stains from block paving enhances the overall aesthetic appeal of your outdoor space, creating a welcoming environment for visitors.
So, without further ado, let's take a deep dive into Marshall's guide to cleaning and general block paving maintenance to keep your driveways looking tip-top.
Method 1: Pressure washing
Pressure washing is a highly effective method for cleaning block paving driveways. By using a pressure washer, you can remove things like dirt and tyre marks.
Here's how to pressure wash block paving:
- Start by clearing the area of any loose material and debris using a stiff broom.
- Connect the pressure washer to a water source and ensure there is sufficient ventilation.
- The pressure washer should be angled at 30°and sprayed diagonally on a medium pressure (not adhering to this advice may mark the surface of some paving materials and break up the jointing material - resulting in the need to re-sand).
- Adjust the pressure washer nozzle to a suitable setting, taking care not to apply too much pressure, which could damage the paving surface.
- Begin washing the block paving surface, moving the nozzle in a sweeping motion to remove dirt and stains.
- Once the surface is clean, allow it to dry thoroughly before replacing any patio furniture or plant pots.
To get into the nitty-gritty of pressure washing, take a look at our guide: How to pressure wash your patio, decking or driveway.
Method 2: Manual scrubbing
Roll up your sleeves for this one! Manual scrubbing is a traditional yet effective technique for cleaning block paving surfaces. While it may require more effort than using pressure washers, it allows for greater precision and control.
Here's how to scrub your block pavers:
- Fill a bucket with hot, soapy water using a mild detergent or washing-up liquid.
- Dip a stiff-bristled brush or wire brush into the soapy water and scrub the block paving surface in a circular motion.
- Focus on areas with stubborn dirt or stains, applying additional pressure as needed.
- Rinse the surface thoroughly with clean water to remove any soapy residue.
- Allow the paving surface to dry completely before assessing the results.
Method 3: Chemical cleaners
Chemical block paving cleaners* can be highly effective for tackling stubborn stains and oil marks on block paving driveways. However, it's essential to use them safely and according to the manufacturer's instructions. This is because most cleaning products will have different processes and timings. Consult a company like Lithofin for specific advice on the type of cleaning product needed and its application process.
*It is important to note that chemical methods of removal should never be used on clay products.
Method 4: Weed removal
Weeds and plant life, such as moss, can quickly become a nuisance and can make block paving maintenance trickier. They also detract from the appearance of block paving and can cause damage to the surrounding joints.
Unfortunately, there is no such thing as a weed-free surface. If detritus is allowed to accumulate on a surface, it will only be a matter of time before weeds or other plants germinate.
Secondly, when properly constructed, weeds do not grow through block paving. Weeds will grow into paving by colonising the sand-filled joints or settling onto accumulated detritus, but it is very rare for weeds to grow through 200mm or so of pavement structure.
You can control weed growth by doing the following:
- Weeds can usually be pulled off the surface of most paving or scraped off using a hoe or similar tool. Where roots have been sent down into the jointing, weed removal often removes some of the sand, which should be replaced as soon as the surface is clean. Partially filled or empty joints are detrimental to pavement performance.
- Regular trafficking by foot or by wheels will limit the ability of the weeds to re-colonise an area. Still, for those areas with little or no traffic, there are several anti-weed strategies available.
- Regular brushing disturbs any newly emerging weeds and removes them before they can establish themselves.
- Weed killers, when used with care, can be very effective at killing existing weeds and deterring re-colonisation for a period of weeks or even months.
Look for products specifically developed for use with paving or in gardens rather than general herbicides that kill everything.
Contact weed killers work by coming into contact with the weed and are suitable for rapid killing of simple surface weeds. A systemic weed killer takes longer to kill the weed, but it is absorbed and taken into the whole plant, not just the above-ground leaves and stems. Always follow the manufacturer’s instructions and avoid washing off in planted areas.
Method 5: Sand replacement
Sand replacement is essential for maintaining the stability and integrity of block paving driveways. Over time, the jointing sand can become displaced or washed away, leading to loose paving blocks and uneven surfaces.
Here's how to re-sand your paving slabs:
- Remove any loose debris, green growth or vegetation from the paving surface using a stiff broom or brush.
- Identify areas where the jointing sand has been eroded or displaced, paying particular attention to high-traffic areas or areas prone to water runoff.
- Use a stiff brush to carefully fill the joints with kiln-dried sand, ensuring it is evenly distributed.
- Sweep away any excess sand from the surface of the paving blocks, leaving them clean and tidy.
For the first few weeks after being laid, the joints between a block paved surface will be relatively porous. Ingressing water from rain or other sources will consolidate the jointing sand and even flush it out (particularly on sloping sites).
It is important that these joints are topped up with jointing sand to prevent damage to your driveway.
Method 6: Biological solutions
Biological solutions offer an eco-friendly alternative for cleaning block paving surfaces, particularly in areas where chemical cleaners may not be suitable.
Biological cleaners contain naturally occurring enzymes and bacteria that can clean your paving safely, just be sure the follow the manufacturer’s instructions carefully.
Method 7: Steam cleaning
Steam cleaning is an environmentally friendly and highly effective method for cleaning block paving surfaces. This technique can remove dirt, oil stains, and even stubborn weeds without the need for chemicals.
Here's how to do it:
- Select a steam cleaner designed for block paving surfaces and follow the manufacturer's instructions.
- Remove any loose debris or obstacles from the paving surface.
- Start from one end and work systematically across the surface, applying steam evenly.
- Concentrate steam on persistent stains or oil marks for effective removal.
- Use the steam cleaner's nozzle to target and eliminate weeds growing between paving joints.
So there you have it, seven tried and tested methods for cleaning block pavers, from jet washing to classic warm soapy water methods. Keep your outside area clean and out of harm's way, and see your paving slabs live a long life.
Explore our full range of block paving at Marshalls
Cleaning block paving is a surefire way to create a serene and enjoyable outdoor space. Not to mention a rejuvenating and rewarding DIY task.
Starting a new driveway project but don't know where to start? Take a look at our inspirational driveway ideas, or discover what driveway is best for your home with our expert-led guides.
At Marshalls, we know your home is unique; that’s why we offer a range of block paving to suit different outdoor designs. So, whether you’re after a contemporary design or a more traditional style, you’re sure to find the perfect block paving to suit your driveway, pathway, garden and patio.
Our team go above and beyond to ensure you are provided with world-class products and services to deliver complete peace of mind from purchase to installation. Whether you need a bit of extra technical support, step-by-step installation guidance, or some inspiration to start designing, the Marshalls team are here to help.
FAQs about cleaning block paving
How do I remove stains and spillages from block paving?
It is important to note that, like people, different stains and spillages require different treatments. The application of any treatment should be carried out on a small section of the affected area first, with the manufacturer’s instructions strictly followed. It pays to try to identify the source of the staining (e.g. rust from iron gutters) and repair it. This will prevent any further staining to your block paving.
What is the best way to clean block paving?
Using a pressure washer or power washer to clean block paving is a fast, reliable and accessible method. Straightforward as it may be, it is important to take necessary precautions during this cleaning process as if the pressure is too high, these machines can become dangerous.
How do I treat efflorescence?
After initial installation, any product containing cement may exhibit a temporary white discolouration known as efflorescence. This is not a product fault and will gradually disappear with exposure to natural weathering and trafficking.
To clean efflorescence, extreme care must be taken when using chemical cleaners and consultation with the manufacturer is always advised prior to carrying out any cleaning process. Marshalls cannot be responsible for the application and performance of any cleaning product.
