5 Common Causes of Block Paving Sinking – and Fixes

Block paving is one of the most popular choices for driveways thanks to its durability, attractive finish, and ability to withstand heavy traffic. However, even the best block paving installations can begin to sink over time if certain issues arise. At Daventry Driveways & Patios, we regularly help homeowners in Daventry restore their paving to its original condition.

Here are five of the most common causes of block paving sinking — and how we fix them.

1. Poor Base Preparation

A solid, well-compacted sub-base is crucial for the longevity of any block paving driveway. If the ground was not excavated to the right depth or the sub-base was not compacted properly, the paving will begin to shift and settle unevenly.

The Fix:
Daventry Driveways & Patios always ensures the correct excavation depth and uses a strong MOT Type 1 sub-base, compacted in layers to create a solid foundation. If we are repairing a sunken section, we lift the blocks, re-prepare the base, and re-lay them level.

2. Inadequate Edge Restraints

Edge restraints are designed to hold the paving in place. Without them, blocks can begin to spread under the weight of vehicles, which eventually leads to dips and uneven areas.

The Fix:
Our team inspects the perimeter of your driveway and reinstalls or reinforces edge restraints where needed, preventing further movement and ensuring a long-term solution.

3. Water Drainage Problems

Standing water or poor drainage can wash away bedding sand under the blocks, leading to voids that cause sections of the driveway to sink.

The Fix:
Daventry Driveways & Patios checks for drainage issues and may install additional channels or adjust the gradient of the driveway to direct water away effectively. We then replenish the bedding sand and re-lay the blocks to restore a smooth, level surface.

4. Heavy Vehicle Traffic

Block paving can sink if it was not designed to handle the weight of regular heavy traffic, such as vans or lorries. Over time, the pressure compacts the bedding layer unevenly, creating sunken patches.

The Fix:
We strengthen the affected areas by re-laying with additional sub-base material, ensuring it can withstand the type of traffic your driveway experiences daily.

5. Settlement of Ground Beneath

Sometimes sinking occurs due to natural settlement or soil movement beneath the driveway, which can happen several years after installation.

The Fix:
Daventry Driveways & Patios carefully lifts the affected blocks, re-levels the ground, and reinstates the bedding layer. This process allows us to restore the original look of your driveway without replacing the entire surface.

Why Professional Repairs Matter

DIY fixes might seem like a quick solution, but they often fail to address the root cause of sinking. Professional assessment ensures that the problem is properly diagnosed and repaired, preventing further damage and extending the life of your driveway.

Conclusion

Block paving sinking is a common issue, but it doesn’t have to mean a full replacement. With expert assessment and targeted repairs from Daventry Driveways & Patios, your driveway in Daventry can be restored to its original strength and appearance. Regular maintenance and prompt action when you notice unevenness will keep your paving looking its best for years to come.

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