A pressure washer can remove visible dirt quickly, but using the most aggressive setting can damage the block face and displace jointing material. The aim is a cleaner driveway that still functions properly afterwards. Begin with the least aggressive method suitable for the actual paving.
Identify the material and condition
Check whether the blocks are concrete, clay or another product, and whether a sealer has been applied. Loose units, failed joints and flaking surfaces deserve assessment before washing. Cleaning is not the right first response to every change in appearance.
Sweep away loose debris and inspect stains individually. A tyre mark, oil spill and pale mineral deposit may need different approaches. Use a cleaner only when it is appropriate for that material and follow its instructions, including an inconspicuous trial.
Keep water out of vulnerable details
Avoid directing a concentrated jet into joints, under edges or towards thresholds. Use the equipment and settings recommended by the paving manufacturer rather than relying on a universal pressure number. Keep wash water and loosened debris from entering unsuitable drains or neighbouring property.
A broad surface-cleaning attachment does not remove the need for care. Its suitability still depends on pressure, condition and the material being cleaned. If the surface starts losing grains or visible jointing material, stop and reassess the method.
Finish the maintenance job
After cleaning, inspect the joints and replace depleted material with the correct product. Conventional and permeable paving require different jointing approaches. Allow the conditions required by the chosen system before replenishing or applying any separate treatment.
Take a photograph of a test patch before proceeding across the driveway. A successful clean should remove dirt without leaving etched surfaces, washed-out joints or a newly uneven colour pattern.
Remember: Clean appearance on its own is not the measure of success. The blocks, joints, edges and drainage should all remain in sound condition.
Discuss your project
Planning block paving in Bristol or South Gloucestershire? Smart Paving can assess the layout, ground and drainage before helping you choose a finish. Arrange a site visit.
Explore our block paving service. See the block paving patterns and finishes guide.
Related reading
- Re-sanding block paving: when it helps and when it does not
- White patches on new block paving: is it fading or efflorescence?
- Does block paving need sealing? A practical homeowner's guide
