How To Clean Block Paving: Remove Algae, Dirt & Weeds

Clean Block PavingBlock paving is a stylish and sophisticated way to add character and interest to your driveway, patio, or other outdoor areas. The clean lines and geometric shapes that block pavers create suit all different styles of homes, from classic to traditional.

Unfortunately, seeing as they’re outdoors they are exposed to the elements and can quickly get dirty, which makes your stunning focal point begin to look a bit dingy and tired.

Luckily, there’s an easy way to clean block paving. We’ve broken it down to three simple steps: removing the weeds, cleaning the block paving, and re-filling the gaps between the paving stones. Read on for our tips and tricks:

Step 1: How To Remove Weeds From Block Paving

We should note that it’s crucial to perform our steps in chronological order. Before you can get into the really satisfying work of cleaning the dirt off your block paving, first, you need to remove any weeds that have managed to spring up around and between your block pavers.

For that this tool does just the job:

Garden Gear Electric Weed Sweeper (140 Watts)

1 new from £42.99
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This handy 140-watt Garden Gear Electric Weed Sweeper comes equipped with an add-on grass trimmer head and two add-on brushes – one metal and one nylon – to help you achieve all your cleaning goals. And don’t worry about breaking the bank: the base price of this electric weed sweeper is very reasonable, and it comes with both brush types supplied.

Its smart design allows you to get rid of weeds without having to kneel or bend over: it’s easy on your back and your knees, and efficient to boot. At just 1.7kg it’s lightweight, and a 10m power cable gives you plenty of room to maneuver. This electric weed sweeper even comes equipped with a transparent safety hood that will protect your eyes from any debris that might go flying in the wake of this powerful electric sweeper.

How-To: Step By Step

  1. First, use the weed sweeper attachment and navigate to any parts of your block pavers where weeds are springing up. The weed sweeper is specifically designed to remove weeds between blocks and slabs, as well as along the edges of paths.
  2. Select and fit your brush: the high-speed nylon brush is perfect for light vegetation, whereas the steel wire brush is designed for tougher more stubborn weeds. Both brushes are engineered to dig into even the smallest cracks and crevices, allowing you to get in deeper than you did with the weed sweeper.
  3. While you have the Garden Gear Electric Sweeper out, you can also use the add-on grass trimmer head: its precision 22cm cutting diameter is perfect for edging around the outsides of patios, driveways, pathways, or slabs and can help you navigate into hard-to-reach spots. You can also use it to augment your lawn care routine elsewhere by using it to create and maintain pristine edges around your lawn.

Video Guide

Step 2: How To Clean A Block Paving Driveway

Once you’ve eradicated all the weeds and other detritus springing up between and around your block pavers, you can get started on the really satisfying part of the cleaning process: removing the dirt and grime from the surfaces of your paving stones.

For that, we turn to Pro-Kleen Patio & Driveway Cleaner.

Pro-Kleen Patio & Driveway Cleaner (10L) - Removes Green Mould, Algae & Lichen

1 new from £24.95
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This powerful liquid cleaning solution removes stubborn dirt, grime, mould, and green algae from your block pavers. It’s unparalleled formula even removes years worth of caked on dirt, so your neglected patio or driveway can look as good as new with very little time or effort on your part. It’s just that simple to use!

How-To: Step By Step

  1. Transfer Pro-Kleen Patio & Driveway Cleaner into a watering can or pump sprayer for maximum coverage: this solution can be applied neat, so no measuring or mixing is required!
  2. Apply Pro-Kleen Patio & Driveway Cleaner to stained or dirty block pavers: for best results, leave on for at least two hours, or overnight if possible.
  3. For areas with extra dirt and grime, use a brush on stained paving stones to loosen it up and give the Pro-Kleen Patio & Driveway Cleaner a chance to penetrate even deeper.
  4. After you’ve let the Pro-Kleen Patio & Driveway Cleaner sit for the recommended amount of time, simply spray it away with a watering can or hose.

Note: Be sure to keep children and pets out of the area until the product has been rinsed away. Also, don’t apply the cleaning formula if rain is forecast in the next eight hours if you decide to leave it on overnight: the rain will wash it away, and you won’t get your best results.

Step 3: How To Refill Your Paving Gaps

Once your patio or driveway has been cleared of weeds and other debris and deep-cleaned, you may notice some cracks and gaps that keep the area from looking its very past. That’s when you give it a little facelift by applying Advanced Sika Setting Sand Narrow Joint Filler.

Advanced SIKA Narrow Joint Filler Sand

6 new from £24.31
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It is a super simple way to rejuvenate your block pavers and make them look as good as new again.

How-To: Step By Step:

  1. Pour Advanced Sika Setting Sand Narrow Joint Filler into any cracks that are showing between your block paving stones.
  2. Sweep Advanced Sika Setting Sand Narrow Joint Filler further into cracks and crevices to even it out and ensure all gaps are evenly filled.
  3. Saturate all areas where you’ve used Advanced Sika Setting Sand Narrow Joint Filler with water.

And believe it or not, that’s all you have to do! Once the joint filler has cured, it won’t wash away, shrink, or crack. This simple application process will help define the lines and corners of all your block paving, making it look sharp and fresh. It’s like having brand-new paving installed with less work and a much lower price tag.

Care & Maintenance FAQ

Now you know how to clean your block paving driveway you probably still have questions about the best ways to care for and maintain block pavers? Read on for our answers to some of the most frequently asked questions about hot to keep your block paving stones looking their best for years to come:

How often should you clean block paving?

A lot of that depends on what time of year it is. In the spring and summer months, you’re going to deal with a lot more weeds and overgrown ass surrounding you patios, driveways, or other areas that utilize block paving stones.

The good news is, once you’ve used the Advanced Sika Setting Sand Narrow Joint Filler, it’s going to help prevent weeds from coming between any cracks in the block pavers since it seals them up so soundly. Generally speaking, it’s best to check out your block pavers once every months or so: that gives you enough time to tackle any weeds or dirt before they grow out of control.

Can you power wash block paving?

As long as your block paving has been sealed with a sealant, it should be perfectly fine to clean with a power washer. However, the sand in between the brick pavers can get dislodged thanks to the powerful spray of water issued by a pressure washer. If you do opt to use a power washer, it’s usually recommended that you hold the sprayer at about a 45-degree angle to reduce the amount of force issued.

If you’re concerned about disrupting the sand between the cracks, or if you don’t have a pressure washer the Pro-Kleen Patio & Driveway Cleaner is really ideal for cleaning your block paving in a safe and simple way.

How do you stop weeds coming back?

Once you’ve gotten your overgrown weeds under control with the Garden Gear Electric Weed Sweeper, you can prevent them from coming back with Weedol Pathclear Weedkiller.

Weedol Concentrate Weedkiller

22 new from £8.00
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as of August 16, 2022 4:00 pm

This powerful weedkiller comes in conveniently individually portioned tubes of concentrated liquid. Simply squeeze one tube into a watering can or pressure sprayer, mix with water, and apply it to areas that are prone to weeds. This sturdy formula kills leaves and roots of existing weeds, and can prevent regrowth for up to three months.

It even prevents new seeds from germinating! For best results, apply it once a year somewhere between March and September, making sure to choose a dry day without anticipated precipitation. After applying the treatment, wait a few weeks for weeds to completely die before clearing out dead foliage to prevent re-spreading.

Can I use bleach to clean my block paving?

It is not advisable to use bleach to clean your block paving stones. Bleach can easily alter the appearance of your pavers, by lightening them overall and also creating unsightly splotches. The Pro-Kleen Patio & Driveway Cleaner is a much safer option when it comes to cleaning your block pavers in a way that preserves how they look.

Can I remove moss with vinegar?

If you look for alternative, natural herbicides online, you may find people talking about using vinegar to kill moss. Vinegar does contain acetic acid which does, in fact, destroy moss: however, the acid found in your regular household vinegars is too weak to do much damage to stubborn and persistent moss.

There’s no real benefit to using vinegar when other products like Pro-Kleen Patio & Driveway Cleaner recommended above are much more effective.

Block paving can be a major focal point for your outdoor areas. The curb appeal of your home can be greatly improved by incorporating block paving stones into your patio or driveway. But while they undoubtedly create a ton of visual interest, they can be tricky to clean.

With our step by step guide to cleaning your block pavers, you can tackle a full revamp or learn some tips and tricks about preventative maintenance which will give you some extra time to enjoy your time outdoors.


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