Block paving looks superb when it is new, but give it a few Manchester winters and the joints fill with weeds, moss creeps across the surface and the blocks fade to a patchy grey-green. Once the joint sand washes out, the blocks start to rock underfoot and the weeds get a proper foothold.
We clean block paved drives, paths and patios across Greater Manchester — Manchester, Stockport, Bury, Oldham, Rochdale, Wigan and the surrounding towns. The clean goes deeper than the surface: weeds and moss are treated at the root, the paving is washed evenly, and the joints are re-sanded with kiln-dried sand so the whole area is left stable and tidy.
What is block paving cleaning?
Block paving cleaning is a three-part job: killing and removing the weeds and moss growing between the blocks, jet washing the surface of the blocks themselves, and re-sanding the joints with kiln-dried sand afterwards. The re-sanding is what separates a proper block paving clean from a quick blast — without it, the blocks loosen and the weeds are back within weeks.
Because block paving is a system — individual blocks held together by joint sand and edge restraints — every stage has to respect how it works. Pressure is kept moderate so blocks are not dislodged, weeds are treated rather than just snapped off, and the fresh sand is brushed in and worked down deep so the surface locks back together.
How we do it
- Inspect the paving and joints: We check the overall condition first — how much joint sand is left, how deep the weed roots go, whether any blocks are sunken, cracked or rocking, and whether the edge restraints are holding. Anything structurally wrong gets flagged honestly before we start, because cleaning will not fix a failed base.
- Treat weeds and moss at the root: Growth between the joints is treated so the roots die back fully, with a dwell time of 20 to 30 minutes. This matters more on block paving than anywhere else: pulling or blasting the tops off leaves the roots in the sand, and they are back within a fortnight.
- Wash the blocks evenly: The surface is cleaned with a rotary head at a moderate pressure — enough to lift ingrained grime, tyre marks and algae, but controlled so blocks are not shifted or chipped. Edges against walls and lawns are finished with a fan lance.
- Re-sand the joints: Once the surface is clean and has had a chance to start drying, kiln-dried sand is swept into every joint and worked down with firm brushing that settles it deep. This locks the blocks together, steadies the surface underfoot and makes it much harder for weeds to re-establish.
- Final rinse and tidy: Excess sand is swept off the surface, everything is rinsed down, and drains and gullies are cleared of the slurry. We walk the area with you and point out any sunken blocks or failed edges worth addressing before they spread.
Why have it done
- Weeds and moss treated at the root, not just snapped off
- Joint sand replaced so blocks stop rocking and shifting
- Original colour of the blocks brought back evenly
- Tyre marks, oil drips and algae lifted from the surface
- Slows regrowth and leaves the paving stable underfoot
Why re-sanding matters more than the wash
The joint sand is the glue of a block paved surface. It stops the blocks moving independently, spreads the load of cars and foot traffic, and blocks the gaps weeds grow through. Every wash removes some of it — that is unavoidable — so a block paving clean that skips re-sanding is actively making the paving worse.
We use kiln-dried sand because it flows into narrow joints and packs down tight. It needs a reasonably dry surface to brush in properly, so on damp days we allow extra time between washing and sanding. Topped-up joints, treated weeds and an even wash are what make the result last instead of fading in a month.
Sunken blocks and failed edges: what cleaning cannot fix
If blocks have sunk or the edge restraints have failed, jet washing will make the area cleaner but it will not level it — that is a relaying job, where the blocks come up and the base is re-graded. We will always tell you when we see this rather than clean over it and leave you disappointed.
What cleaning does fix is everything on top of a sound base: weeds, moss, staining, faded colour and loose surface sand. And if the whole drive needs attention rather than just the joints, our driveway jet washing page covers the broader clean — the two often go together on the same visit.
What does it cost?
As a rough guide, block paving cleaning across Greater Manchester typically falls between £90 and £220 depending on the area size, how overgrown the joints are and how much sand needs replacing — every job is quoted free after a look at photos or a quick site visit.
Block Paving Cleaning FAQs
How much does block paving cleaning cost in Manchester?
Most domestic block paved drives and patios across Greater Manchester fall between £90 and £220. The size of the area is the main factor, then the condition of the joints — heavily weeded paving takes longer to treat and needs more sand replaced. We quote free from photos or a visit, with the re-sanding included, never added on as a surprise.
Will jet washing blast the sand out of my block paving?
Washing does open up the joints — there is no honest way to deep-clean block paving without disturbing some sand. That is exactly why re-sanding is built into our process rather than offered as an extra. We keep the pressure moderate so blocks are not dislodged, then brush kiln-dried sand back into every joint to lock the surface together again.
How long will the re-sanded joints last?
With the weeds treated at the root and fresh kiln-dried sand packed in, the joints typically stay tidy for a year or more before they need attention again. A weed treatment across the joints once or twice a year stretches that further. Heavy rain and traffic gradually erode sand — that is normal wear, not a fault in the clean.
Some of my blocks have sunk — can cleaning fix that?
No, and we will tell you so upfront. Sunken blocks mean the base underneath has moved, and the fix is lifting the blocks and re-grading the base — a relaying job, not a cleaning one. Washing will still make the area look far better, but we would rather flag the underlying issue honestly than let you discover it after paying for a clean.
How often should block paving be cleaned?
For most homes in Greater Manchester, once a year keeps weeds, moss and staining under control — the damp climate means growth comes back faster than in drier parts of the country. Drives under trees or in heavy shade may benefit from a weed treatment between cleans. Regular light maintenance beats letting it go for three years and needing a rescue job.
Should I seal my block paving after cleaning?
It is a choice, not a necessity. Sealing locks the joint sand in place, slows weed regrowth and deepens the colour of the blocks, which suits high-traffic drives and shaded areas that green up fast. But it adds real cost, must go onto a completely dry surface, and a cheap sealer can peel within a year. We will give you an honest view on whether your drive would benefit — and we do not sell sealants, so there is no sales pitch.
Can I just use weedkiller between cleans?
Yes, and we encourage it. A path-and-driveway weedkiller across the joints once or twice a year, applied in dry weather so it reaches the roots, is the best way to keep the paving tidy between professional cleans. It will not replace a proper clean — it does nothing for oil, algae or faded colour — but it does slow regrowth noticeably. Sweep the joints first so the weedkiller reaches the soil, and follow the product instructions carefully around pets.
What is the best time of year to clean block paving?
Spring and autumn are ideal. Spring clears away the winter's moss, algae and salt residue and leaves the drive looking its best for summer; autumn clears leaf staining and gets the joints re-sanded before the wet weather arrives. Winter cleans are perfectly possible in a dry spell, though the fresh sand takes longer to settle. The worst time to ignore it is not a season — it is three years of build-up that turns a maintenance clean into a rescue job.
How long does block paving cleaning take?
A typical domestic drive or patio takes three to five hours, including the weed treatment dwell time, the wash, the re-sanding and the tidy-up. Badly overgrown joints or heavy staining can stretch that to a full day, because the treatments need time to work and the sand needs a reasonably dry surface to brush in. We always tell you the expected time in the quote, so there are no surprises on the day.
My block paving has gone black — is that just dirt?
Usually it is algae and lichen growth rather than dirt, and it is extremely common on Manchester drives. The dark film feeds on damp and shade, which is why the shaded half of a drive goes black while the sunny half stays brighter. It lifts off with a proper pre-treatment and wash, bringing the original block colour back evenly. If some blocks stay dark after cleaning, that is usually deep staining in older, porous blocks — we will point it out honestly.
Do you clean block paving paths and patios, or just driveways?
All of it. We clean block paved paths, patios, courtyards and edging as well as driveways, and it is often cheaper to have them done together since the van, the equipment and the treatments are already on site. The method is the same: weed treatment at the root, an even wash, and kiln-dried sand brushed back into the joints. Just mention the extra areas when you ask for a quote so everything is covered in one visit.
Block Paving Cleaning across Greater Manchester
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