Slab Leak Repair Kraaifontein | Under-Floor Pipe Leak Experts

About Slab Leak Repair in Kraaifontein

A slab leak occurs when a water pipe running beneath or within your concrete floor slab develops a crack or hole, allowing water to seep into the surrounding concrete and soil. Slab leaks are among the most serious plumbing problems because they are completely hidden from view, can waste enormous amounts of water, and if left unaddressed, can undermine the structural integrity of your foundation.

In South African homes, slab leaks are commonly found in copper pipes that were cast into the concrete slab during construction - a practice common in the 1970s and 1980s. Over time, the copper reacts with chemicals in the concrete (a process called concrete-copper corrosion), developing pinhole leaks. Galvanised pipes in slabs corrode even faster. The resulting leak saturates the slab, causing floor tiles to lift, grout to crack, skirting boards to swell, and in severe cases, foundation movement.

Abacas Solution specialises in locating and repairing slab leaks with minimum disruption. We use electronic leak detection equipment to pinpoint the exact leak position through the concrete, eliminating the need to break up large sections of floor searching for the problem. Once located, we offer two repair approaches: direct repair, where we open the slab at the exact leak point and repair the pipe, or rerouting, where we bypass the under-slab pipe entirely with a new pipe routed through the wall or ceiling cavity.

This is one of several specialist services we offer under leaks & pipe repairs in Kraaifontein. As part of our Kraaifontein plumbing team, we bring over 25 years of hands-on experience to every job.

Slab Leak Repair in Kraaifontein - Abacas Solution

When to Call for Slab Leak Repair

Call when you find unexplained warm spots on your floor, when floor tiles start lifting or cracking without impact, when your water bill spikes and you cannot find a visible leak, when you hear water running under the floor with all taps closed, or when foundation cracks appear alongside increased water usage.

Our Slab Leak Repair Process

1

Slab Leak Confirmation

We confirm the leak is under the slab by pressurising the hot and cold water systems separately and monitoring for pressure drop. This also tells us whether the leak is on the hot or cold supply, narrowing the search area significantly.

2

Precision Location

Using acoustic amplification equipment and thermal imaging, we trace the pipe route through the slab and identify the exact leak point. We mark the position on the floor surface with precision, typically to within a 300mm radius.

3

Repair Decision

We present two options: (a) Direct repair - open the slab at the leak point, repair the pipe, and patch the concrete; (b) Reroute - abandon the under-slab pipe and run a new pipe through the ceiling or wall cavity, avoiding future slab leak risk. We recommend the best option based on pipe condition and property layout.

4

Repair & Restoration

For direct repairs, we carefully break out the concrete around the leak, repair or replace the pipe section, test under pressure, then patch the concrete and arrange tile replacement. For reroutes, we cap the old pipe at both ends and install the new route.

Many homeowners in Kraaifontein who need slab leak repair also require burst pipes in Kraaifontein and leaking taps & faucets. We handle everything, so you only need one call.

Safety & Compliance

Slab leaks that have been active for an extended period may have caused foundation movement, creating cracks in walls and door frames that no longer close properly. If you observe these structural symptoms, inform us and consider getting a structural engineer's assessment alongside the plumbing repair. Breaking into a concrete slab requires diamond cutting or jackhammer work - we take precautions to avoid embedded electrical conduits and reinforcing steel.

Slab Leak Repair Cost in Kraaifontein

Slab leak repair costs depend on whether direct repair or rerouting is chosen, and the accessibility of the leak. Detection and location typically costs R1,000-R2,000. Direct slab repair including breaking out, pipe repair, concrete patching, and basic floor restoration costs R2,500-R6,000. Full rerouting of the pipe through ceiling or walls costs R3,000-R8,000 depending on pipe length and route complexity. Tile matching and replacement is quoted separately.

Frequently Asked Questions

What are the signs of a slab leak?

Common signs include warm or damp spots on your floor (especially with hot water slab leaks), floor tiles lifting or grout cracking for no apparent reason, the sound of water running when all taps are closed, a sudden spike in your water bill, foundation cracks appearing in walls, and doors or windows that start sticking. If you notice several of these together, a slab leak is likely.

How much does slab leak repair cost in Kraaifontein?

Slab leak detection in Kraaifontein typically costs R1,000-R2,000. Direct repair through the slab costs R2,500-R6,000 including pipe repair and concrete restoration. Rerouting the pipe through ceiling or walls costs R3,000-R8,000. The best option depends on the pipe's overall condition - if it is likely to develop more leaks, rerouting avoids future slab break-outs.

Is it better to repair the slab leak or reroute the pipe?

If the leak is an isolated incident on an otherwise healthy pipe, direct repair is usually the most cost-effective option. However, if the pipe is old copper or galvanised steel cast into the slab, more leaks are likely to develop in the future. In that case, rerouting the entire pipe above the slab eliminates the risk of repeat slab break-outs and is the better long-term investment.

Can a slab leak damage my foundation?

Yes. A persistent slab leak saturates the soil beneath your foundation, which can cause the foundation to shift, settle unevenly, or heave if the soil is expansive clay. Signs of foundation damage include diagonal cracks in walls, doors and windows that stick, and visible gaps between walls and ceiling. Early detection and repair prevents these serious structural consequences.