How to Stop Your Block Paving from Sinking Over Time
Block paving is one of the most popular driveway choices across the UK, and it’s easy to see why. It’s attractive, versatile, and long-lasting—when installed and maintained properly. However, one of the most common issues homeowners in Ashtead and the wider Surrey area face is the gradual sinking of their block paving over time. At NS Driveways Ashtead, we’ve seen firsthand how small oversights can lead to bigger problems, and we’re here to help you prevent them.
Why Does Block Paving Sink?
The most common causes of sunken block paving include:
- Poor sub-base preparation – The base layer beneath the blocks isn’t compacted properly.
- Inadequate drainage – Standing water weakens the foundation.
- Heavy vehicle traffic – Especially if the blocks weren’t designed for that level of load.
- Soil movement – Particularly in areas with clay-rich or shifting ground.
Simple Steps to Prevent It
If you want your paving to remain level and tidy for years to come, here’s what you need to focus on:
- Proper base installation: Always ensure at least 150mm of MOT Type 1 hardcore is well compacted before laying sand and blocks.
- Use kiln-dried sand between joints and reapply it occasionally—this locks the blocks in place and prevents movement.
- Edge restraints matter: Robust edge blocks prevent lateral movement, which can lead to sinking at the sides.
- Improve water drainage: Install a suitable soakaway or channel drainage to guide water away from the surface.
- Schedule occasional maintenance: Regular sweeping, weed removal, and re-sanding can extend the life of your driveway.
Conclusion
Sinking block paving is not inevitable—it’s preventable. With the right installation techniques and a touch of ongoing care, your block-paved drive can remain level, safe, and good-looking for decades. If your paving is already showing signs of unevenness, don’t ignore it—it’ll only get worse. Reach out to NS Driveways Ashtead, and we’ll be happy to assess, advise, and restore your driveway to its former glory.
Call us on: 01372 233 895
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