Why Your Block Paving is Sinking (And It’s Not Just the Rain)
Have you ever looked out of your window and noticed a slight dip in your driveway where there used to be a perfectly flat surface? It is a common sight across Sittingbourne, and most homeowners naturally point the finger at the British weather. While the rain certainly plays its part, at Base Driveways, we know that a sinking drive is usually telling a much deeper story. Here are the real reasons why your blocks are starting to move.
1. Poor Foundation and Sub-Base Depth
The most common reason for sinking isn’t the blocks themselves, but what lies beneath. When we install block paved driveways in Kent, we always use a high-quality MOT Type 1 sub-base. If a previous installer cut corners by not digging deep enough or using cheap, soft materials, the foundation simply won’t have the strength to hold the weight of your car. Over time, the ground settles, and the blocks on top follow suit.
2. Inadequate Soil Compaction
Think of the soil like a sponge. If it isn’t squeezed tightly during installation, it will eventually compress on its own. We use heavy-duty vibrating rollers to pack the ground down in layers. If this step is skipped or done with a small wacker plate that isn’t powerful enough, air pockets remain. Eventually, the weight of your vehicle pushes the air out, and your driveway develops those annoying tyre-track ruts.
3. The Hidden Danger of Leaking Pipes
Sometimes, the problem is completely invisible. It might be caused by a small leak in an underground water pipe or a cracked drain. This can slowly wash away the bedding sand that holds your blocks in place, creating voids or empty spaces underground.
Without sand to sit on, the blocks have nowhere to go but down. We take the same careful approach when checking the ground for patios in Kent, ensuring no hidden leaks will ruin your new garden feature.
4. Loss of Jointing Sand
The sand between your blocks isn’t just for show; it creates friction that locks everything together. If you use a high-pressure jet wash too aggressively, you can blast this sand out. Without it, the blocks lose their bridge-like strength and begin to tilt or sink individually.
Get a Professional Opinion Today
A sinking driveway is a trip hazard and can lower your property value. At Base Driveways, we can often lift and relay your drive to make it look brand new again. Contact us today for a free, no-obligation site survey, and let’s get your driveway level again!
