When your driveway starts sprouting weeds, pooling water, or sinking in patches, the bricks are not failing you. The layers underneath have moved, and they are trying to tell you exactly what went wrong.

Quick Diagnosis: What Each Symptom Means

Where the paving fails tells you what failed under it.

• Sinking in one dip: usually points to bedding sand being washed out, usually from a downpipe or a leak discharging onto the paving
• Sinking in two parallel tracks: sometimes the sub-base van be too thin for vehicle loads, so the wheel paths are compacting
• Gaps widening and paving stones shifting outwards: the edge support may be broken, or was never built.
• Weeds in nearly every gap: the sand between the stones could be gone, and an empty gap is a perfect place for seeds to grow.
• Water pooling in patches: the surface has settled into a low spot, or may have been laid too flat
• Water running towards the house: the fall could be going the wrong way, and that needs attention before the next storm

A slow leak or a blocked stormwater pipe will wash bedding sand away quietly for months before the surface gives in. Plumbing problem hiding under your paving? Kandua got’s your back on your paving issues.

How Driveways Work (and Fail)

A lasting driveway is built in careful layers: packed earth, crushed stone, a bed of sand, the paving stones, and sand swept between the gaps.

• Edge supports are crucial. Every driveway needs a solid border. Without it, the stones will slowly spread outward and separate.
• Check your quotes. A good contractor won't just give you a price; they will explain exactly how they plan to build these layers.

Why Pavers Sink

Paving stones don’t sink on their own—the ground underneath them gives way.

Water damage: If water constantly dumps in one spot (like from a roof gutter), it washes away the sand beneath the stones, causing them to collapse into the hole.

Poorly packed soil: If the base layers weren't compacted properly during installation, the heavy weight of your car will press them down, creating dips where your tires run.

The Fix: You rarely need a brand-new driveway. A professional can just lift the sunken stones, fix the base layers, and relay the exact same stones.

Dealing With Weeds

Weeds don’t push up from underneath the driveway; they grow from seeds blowing into empty gaps from above.

Don't pressure wash: High-pressure washing makes the problem worse by blasting away whatever sand is left between the stones.

The Fix: The permanent cure is to clean the gaps and sweep proper jointing sand back into them. This locks the stones tightly together and removes the empty space where seeds like to grow.

Pooling Water

Driveways are designed to shed water off the top, not soak it up like a sponge.

Surface puddles: If water stands for hours, it means the paving has sunk, was laid too flat, or a drain is blocked.

Hidden water: Sometimes water gets trapped under the paving, which softens the dirt and causes the driveway to sink over time.

The Urgent Warning: If water is pooling against your house foundation or running into your garage, fix it immediately. Water damage to your house costs far more to repair than a driveway.

What You Can Do Yourself, and What Needs a Pro

Worth doing yourself: topping up the jointing sand, clearing grates and channels, redirecting a downpipe that discharges onto the paving, and photographing the dips during rain (that tells a Pro more than any description ever will).

Call a Pro for sinking bigger than a few blocks, broken or missing edge restraints, water that repeatedly remains after rain…, a suspected leak under the surface, or regrading a driveway laid with the wrong fall.

Read: How Much Does A Plumber Cost per hour in South Africa

Paving Is Not a Licensed Trade, So Vetting Matters More

Plumbing has PIRB. Electrical has the Wireman's Licence and SANS 10142-1. Paving has no COC and no licence, so anyone with a plate compactor can call themselves a paving contractor. Nobody checks the work but you. That is the gap Kandua closes: every Pro goes through insurance-grade vetting before they get near your driveway.

A fair quote itemises the sub-base depth and material, the bedding sand, the block type and thickness, the edge restraint detail, the fall being worked to and what happens to the excavated material. If a quote is one line and one number, ask for the breakdown before you sign.

Frequently Asked Questions

Why are my pavers sinking after heavy rain?

Rain has washed bedding sand into a void, or saturated a sub-base that was never compacted properly. Look for a downpipe, tap or irrigation line discharging near the dip.

Can sinking pavers be lifted and re-laid, or must the whole driveway come up?

Usually just the affected section is lifted, the layers rebuilt and compacted, and the original blocks re-laid. Block paving is repairable in sections.

How do I stop weeds growing between my pavers?

Refill the joints. Weeds need a gap with dust in it. Keep the jointing sand full and vibrated down, and stop pressure washing it out.

Should I repair or replace old paving?

If the blocks are sound and the fault lies in the layers below, repair is almost always the better spend.

Does a paving job need a COC?

No. Paving is not a regulated trade in South Africa, so there is no certificate of compliance. Your protection comes from the specification in the quote and from using a vetted Pro.

How do I stop water running towards my house?

The surface needs regrading so it falls away from the building, often with a channel or grate at the low point. That means lifting and rescreeding the paving, so it is a Pro job.

Sort Out Your Driveway Before the Next Downpour

Tell Kandua what your paving is doing and get a straight answer on whether it needs a sand top-up or a full re-lay, then a quote from a vetted Pro.

Let Kandua help you sort it out: www.kandua.com

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