Pressure washing guide
How much does it cost to clean block paving?
Block paving requires more than a simple blast with a pressure washer. Re-sanding after cleaning is essential to keep the blocks stable and prevent weeds returning. Here is what a complete block paving clean costs in London and what is included.
Block paving is one of the most popular driveway surfaces in London, and it requires a more involved cleaning process than concrete or tarmac. Pressure washing removes the kiln-dried sand from between the blocks, which must be replaced after every clean to maintain the structure and prevent weeds. Understanding what is included in a block paving clean and what is quoted separately helps you compare prices accurately and avoid hidden costs.
£250 to £500
typical cost to clean and re-sand a medium block paving driveway in London
£5 to £8
per sqm for a full clean, re-sand and seal service on block paving in London
£1,800
average cost to replace a block paving driveway, making regular cleaning a far better investment
What does block paving cleaning involve?
A professional block paving clean is a multi-stage process. The cost you receive in a quote should reflect all of these stages, and you should confirm what is and is not included before agreeing to any work.
1. Pre-treatment (if needed)
Heavy weed or moss growth may require a pre-treatment application and dwell time before cleaning. This adds to the overall time and cost but improves the result.
2. Pressure washing
High-pressure wash removes algae, moss, stains and surface grime from the block faces and joints. Correct technique avoids displacing blocks or eroding the surface.
3. Re-sanding
Kiln-dried sand is brushed into the joints after cleaning to restabilise the blocks and prevent them shifting. This is essential and should always be included or quoted separately.
4. Sealing (optional but recommended)
A sealer applied after cleaning and re-sanding hardens the joint sand, repels oil and water, inhibits weed growth and extends the time between future cleans. Should not be done in winter when surfaces hold moisture.
5. Clean-up and inspection
Excess sand swept away, surface inspected and any wastewater managed in compliance with drainage regulations.
Block paving cleaning cost breakdown
Is sealing worth it?Should you seal block paving after cleaning?
Sealing is optional but consistently delivers value. A quality sealer hardens the joint sand so it does not wash out between cleans, creates a barrier against oil and water staining, makes future cleaning easier and extends the interval between professional cleans from around 12 months to 2 to 3 years. The upfront cost of sealing is recovered over time through reduced cleaning frequency. On London driveways where pollution levels are high, sealing is particularly beneficial as it prevents the ingrained grey staining that forms on unsealed block paving over time.
Professional pressure washing London
Professional block paving cleaning across London
Cloud Nine cleans and re-sands block paving driveways and patios across all London boroughs. We use commercial-grade equipment, replace joint sand after every clean and offer optional sealing for long-term protection. Contact us for a free no-obligation quote.
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Everything you need to know about pressure washing for London homes and businesses, from surface types to costs and what to expect from a professional clean.
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