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Slab Leak Detection

Leak UnderYour Slab?

Q: What are the signs of a slab leak?

Unexplained increases in your water bill, the sound of running water when everything is off, warm or hot spots on the floor, damp or discoloured flooring, and cracks appearing in walls or the slab.

Q: How do you find a leak under a concrete slab?

We use pressure testing, acoustic listening equipment, and thermal imaging cameras. This lets us pinpoint the leak location without breaking up the entire slab.

We pinpoint slab leaks using acoustic listening equipment and thermal imaging — without breaking up your entire floor. Northern Rivers NSW.

Targeted access only. Pipe relining available. Insurance report provided.

Call Now — 0487 810 593 Get a Free Quote

Warning signs

Signs You Have a Slab Leak

Slab leaks get worse quickly. The longer they go undetected, the more damage they cause to your slab, flooring, and foundations. If you notice any of these signs, call us.

Unexplained increase in water bills
Sound of running water when all taps are off
Warm or hot spots on the floor
Damp, wet, or discoloured flooring
Cracks appearing in walls or floor slabs
Mould or mildew smell with no visible source
Low water pressure throughout the property

Plumber detecting slab leak under concrete floor Northern Rivers

Targeted access only

We cut at the exact leak point — not the whole floor.

The process

How We Find It

Pressure Testing

We isolate sections of your plumbing and pressure-test to confirm a leak exists and narrow down its location.

Acoustic Detection

Specialist acoustic listening equipment is used to hear the sound of water escaping through the slab — pinpointing the leak to within centimetres.

Thermal Imaging

For hot water pipe leaks, thermal imaging cameras detect temperature differentials in the slab surface, confirming the leak location.

Targeted Access

We core-drill or cut the slab at the confirmed leak point only — minimising damage to your floor and reducing repair cost.

Repair & Reinstate

The pipe is repaired or relined, the slab is reinstated, and we pressure-test again to confirm the repair is complete.

Insurance Claim?

Many home insurance policies cover slab leak detection and access under 'trace and access' cover. We provide a detailed written report of the detection process and findings to support your claim.

Call for a Report

Transparent pricing

What Does It Cost?

We quote upfront — no surprises. Detection fee is applied toward the repair cost if you proceed with us on the same day.

$350 – $600

Slab leak detection

Includes pressure testing, acoustic & thermal scan.

$800 – $2,500

Pipe repair (after detection)

Depends on pipe type, depth, and access.

$2,000 – $5,000

Pipe relining under slab

No-dig option where excavation isn't practical.

Call 0487 810 593 for a free assessment. We'll confirm the detection approach and give you a fixed price before we start.

Where we work

Slab Leak Detection Across the Northern Rivers

We service the full Northern Rivers region — from coastal towns to rural hinterland properties.

BallinaByron BayLismoreCasinoMullumbimbyBrunswick HeadsOcean ShoresLennox HeadBangalowEvans HeadKyogleGraftonMurwillumbahTweed HeadsYamba

Common questions

Slab Leak FAQs

What are the signs of a slab leak?

The most common signs are unexplained increases in your water bill, the sound of running water when everything is turned off, warm or hot spots on the floor (for hot water pipe leaks), damp or discoloured flooring, and cracks appearing in walls or the slab. If you notice any of these, call us — slab leaks get worse quickly.

How do you find a leak under a concrete slab?

We use a combination of pressure testing (to confirm and isolate the leak), acoustic listening equipment (to hear the water escaping), and thermal imaging cameras (for hot water pipe leaks). This lets us pinpoint the leak location without breaking up the entire slab.

How much does slab leak detection cost?

Detection typically costs $350–$600 and includes pressure testing, acoustic scanning, and thermal imaging where applicable. If you proceed with the repair on the same day, we apply the detection fee toward the repair cost.

Does insurance cover slab leak repairs?

Many home insurance policies cover the cost of locating and accessing a slab leak, but not always the pipe repair itself. We can provide a detailed written report of the detection process and findings to support an insurance claim. Check your policy's 'trace and access' cover.

Do you have to break up my whole floor?

No. Our detection equipment lets us pinpoint the leak to within a few centimetres, so we only need to cut or core-drill at the exact leak location. In many cases, pipe relining is an option that avoids any slab cutting at all.

How long does slab leak detection take?

Most slab leak detections are completed in 1–3 hours. If the pipe can be relined, the full job (detection + relining) is typically done in a single day.

View all FAQs

Don't let it get worse

Find Your Slab Leak Today

Call now or request a quote online. We'll pinpoint the leak and give you a fixed repair price before we start.

Licence No. 230095C · Northern Rivers NSW

What our customers say

Leak Detection Reviews

5.0(2 reviews)

Verified

Found a hidden slab leak without tearing up the floor

“My water bill had doubled but I couldn't see any obvious leak. Terry used acoustic detection equipment and pinpointed a slab leak under the laundry in about 20 minutes. Minimal concrete cutting, pipe repaired and re-tested the same day. Saved me thousands compared to what I'd been quoted elsewhere.”

Problem

Water bill doubled with no visible leak — suspected slab leak under the laundry floor

Solution

Acoustic leak detection pinpointed the exact location; minimal concrete cutting, pipe repaired and pressure-tested

Resolved in1 hour 45 minutes

Satisfaction

10/10

Slab leak found and repaired with minimal excavation

Jess W.

Mullumbimby

June 2026

Verified

Thermal imaging found a leak inside the wall

“I could hear water running but couldn't find where it was coming from. Terry used thermal imaging and found a pinhole leak inside the bathroom wall. He opened a small access panel, repaired the pipe and patched the wall. No major demolition needed — I was so relieved.”

Problem

Audible water running inside the bathroom wall with no visible source — suspected pinhole leak

Solution

Thermal imaging camera located the pinhole leak precisely; small access panel cut, pipe repaired, wall patched

Resolved in1 hour 30 minutes

Satisfaction

10/10

Hidden wall leak found with thermal imaging and repaired with minimal damage

Sarah J.

Ocean Shores

June 2026

Ready to get the same result?