Block paving can transform any garden, patio, or driveway into something more structured and organised-looking, but unfortunately block paving cleaning methods are often seen as too much effort. Believe it or not, it’s actually very simple to get your block paving looking its best. You’ll need a two-pronged attack – tackling the weeds and removing dirt from the slabs themselves – but both steps are remarkably easy, and you won’t need to go out and buy costly products from the DIY store, either.
You will need:
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Steps on how to clean block paving
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1
Remove weeds, gently pull them, or use a hoe to gently lift them up and away from your paving
Before you even start thinking about how to clean paving slabs, you’ll want to tackle the issue of weed growth. Many people think that weeds can actually grow through the paving slabs themselves, but this isn’t true (unless you’re dealing with Japanese knotweed, that is – this notorious weed can get everywhere). Instead, weeds grow up through the sand joints, and in doing so they can disturb the sand, leaving your paving slabs vulnerable to movement and tipping
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2
To remove new weeds, brush your paving regularly to dislodge any new growth and help keep your paving looking clear
When new weeds emerge, you may be tempted to use a weed killer to get rid of them and prevent them from growing through the joints completely. While you can do this (and weed killer is easily available in DIY stores), you may find it easier and more cost-effective to try and discourage the weeds from growing at all.
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3
Use a jet washer
You may have heard many people talk about how cleaning block paving is a piece of cake with a power washer – and it is – but is it really the best option? Yes, a jet washer will remove any dirt and moss covering your slabs, but it could also dislodge the sand. If you do use a power washer, it’s generally recommended that you angle it at 45 degrees, which reduces some of the pressure on the sand. You can still expect a good few inches of top sand to come off, however. Whether or not you use a jet wash is completely your decision. It’s very effective and quick at removing dirt, but it’ll take you longer to get your paving looking good afterwards, as you’ll need to replace the sand that has been dislodged. To do this, apply slightly more than you actually need, as you’ll find some of the loose particles can disappear in the wind or rain. Every few days over the next week, gently brush the sand into the joins, until it settles enough to once again hold the slabs firmly in place.
Always read the manual before using a pressure washer and wear protective clothing.
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Block paving cleaners
Forget about special products for cleaning block paving slabs – all you really need is some water and a form of mild, gentle soap such as dishwashing liquid or laundry detergent like persil. Whether you use hot water or cold depends on your preferences, and the type of soap you’re using. Both hot and cold water work equally well, but if you’re using a powdered soap, hot water will dissolve the powder more thoroughly. Using a brush, gently scrub the slabs with the soapy solution, and rinse with clean water.
You will, however, want to keep an eye out for products that could cause damage to block paving. Any soap that warns against use on limestone or marble should be avoided, and, if you’ve got concrete paving, cleaning products that contain acid aren’t a good idea. You may think that you need something strong to make a difference to paving slabs, but really a regular household soap can work just fine. Always test your solution on a small area of your paving first to check there is no damage and wear rubber or gardening gloves to protect your hands.
Monoblock cleaner for moss removal A monoblock driveway should last for a number of years, whilst being functional and looking extremely attractive. However, one of the biggest issues can be a build-up of moss and weeds, particularly between the individual blocks. Knowing how to effectively use a monoblock cleaner successfully will alleviate this issue. The first thing to do is a good old-fashioned sweep, trying to remove as much dirt as possible. You can then treat any weeds with a professional weed killer before you attempt to clean any moss, ideally around a week before. Spraying the monoblock with moss killer will kill any moss on contact, leaving you to wash the area with either a jet wash or some soap and hot water, as mentioned above.
How to clean block paving without a pressure washer
If you do not have a pressure washer, fret not. There’s still a way to clean block paving without it. You can use a stiff broom or a floor scrub along with a bucket of soapy water. While this basic method requires you to exert more effort, it is effective enough in preserving the integrity and look of your block paving.
Here’s how to clean block paving without a pressure washer:
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Mix about two tablespoons of washing-up liquid into a bucket of water.
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Pour your homemade paving stone cleaner onto the surface of the blocks.
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Use your floor brush to scrub off any moss, dirt or debris.
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Rinse the block paving with clean water.
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Remember to apply kiln-dried sand to replace any missing jointing materials.
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Finally, keep the weeds at bay by adding a weed killer.
The disadvantage of this method is it can be time-consuming and exhausting. Also, it can be ineffective if you’re dealing with heavily soiled block paving. However, this is the best way to clean block paving if prefer an eco-friendly method and you don’t want to rack up your electric bill.
Preventing weeds and moss in block paving
Preventing weeds and moss in block paving can help keep your outdoor surfaces looking neat and well-maintained. Here's how to tackle these common issues:
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Regular Cleaning: Start by regularly sweeping and cleaning your block paving to remove dirt and debris. This prevents the accumulation of organic matter that can foster weed and moss growth.
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Weed Membranes: Install weed membranes or geotextile fabric beneath your block paving during installation. These barriers inhibit weed roots from penetrating the surface.
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Joint Sand: Ensure the joints between your blocks are properly filled with kiln-dried sand. This helps deter weed seeds from finding a foothold and also stabilises the blocks. It also helps if you opt for polymeric sand that can effectively prevent weeds from growing between the joints.
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Chemical Treatments: Use weed-killing solutions or moss control products specifically designed for block paving. Apply these treatments cautiously, following manufacturer instructions.
Quick Tip: You can also read our guide on how to remove moss from your driveway for a more comprehensive approach to dealing with weeds.
5. Regular Maintenance: Periodically inspect your block paving for any signs of weeds or moss. Promptly remove any growth that appears to prevent it from spreading. And if you forgot to remove your shoes after cleaning your block paving, you can always read our guide on how to get mud out of carpet fibres.
By implementing these preventative measures, you can enjoy weed and moss-free block paving that enhances the aesthetic appeal of your outdoor space.
With these tips, you should be able to get your block paving looking as smart as ever with little effort – giving you more time to relax!
Frequently asked questions about block paving cleaning
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Can I pressure wash block paving?
Yes, if done correctly, pressure washing can be a safe method for cleaning block paving. Remember to use a low to medium setting and a 45-degree angle to ensure that you won’t damage the blocks. Also, taking this approach is the best way to prevent you from dislodging the sand which can be challenging to replace. -
Will bleach damage block paving?
Yes, bleach can damage block paving if you have artificial or coloured blocks. Also, if you have limestone or marble block paving, you shouldn’t use bleach. The chemical can damage the seal and eventually affect the look of the blocks. -
Will washing up liquid clean block paving?
Yes, in most cases, washing up liquid is enough to effectively clean block paving. -
Does block paving need maintenance?
Yes, block paving needs regular cleaning. Otherwise, it will develop weeds that can be difficult to remove. Also, neglecting your block paving will cause it to develop moss or mould, which can be slip hazards.
