Underfloor & In-Slab Leak Detection Melbourne
Hidden leaks beneath concrete or timber floors? We detect, repair and protect with precision - keeping your home dry, safe and stress-free.
When the Leak Is Beneath Your Feet, We’re the Experts to Call
You can’t always see a burst pipe beneath a floor or slab — but the signs often appear quickly. Rising water bills, damp flooring, musty smells, or unexplained moisture can all point to a hidden water leak beneath your home.
At Detect & Repair, we specialise in underfloor and slab leak detection in Melbourne, using advanced acoustic sensors, thermal imaging and non-invasive pressure testing to pinpoint leaks beneath concrete slabs, timber floors and subfloor spaces.
Whether it’s a burst mains pressure pipe under a slab, a leaking hot water line beneath your floor, or a concealed plumbing leak causing structural damage, our experienced plumbers locate the source quickly and carry out lasting repairs — protecting your home and plumbing system from further damage.
Slab leaks rarely fix themselves — early detection is the key to avoiding major structural and plumbing damage.
Common Causes of Leaks Beneath Slabs & Floors
Why Do Underfloor & In-Slab Pipe Leaks Happen?
Water pipes beneath concrete slabs or timber floors are usually out of sight — but over time pressure, movement and ageing pipework can lead to hidden leaks.
Common Causes of Leaks Beneath Slabs & Floors
Aged or Corroded Pipework
Older Melbourne homes often have copper, galvanised or ageing poly water pipes running beneath concrete slabs or timber subfloors. Over time these pipes can corrode, thin, or develop small fractures that eventually lead to hidden leaks beneath the home.
High Mains Water Pressure
Constant high mains pressure places stress on pipe joints, bends and fittings beneath floors and slabs. Over time this pressure can weaken connections or split pipe walls, causing slow leaks or sudden pipe bursts beneath the slab.
Ground Movement or Slab Shifting
Melbourne soils naturally expand and contract with seasonal moisture changes. This ground movement can place pressure on buried water pipes beneath slabs, eventually causing cracks, joint separation or pipe displacement.
Damage From Previous Renovations or Plumbing Work
During renovations or previous plumbing repairs, pipes beneath floors can be accidentally nicked, bent or poorly reconnected. These small faults may go unnoticed for years before developing into a hidden under-slab water leak.
Thermal Stress From Hot Water Pipes
Hot water lines buried within concrete slabs expand and contract as they heat and cool. Without proper insulation or protective sleeving, this constant movement can weaken pipe walls and eventually cause leaks beneath the slab.
Poor Installation or Pipe Protection
Incorrect pipe bedding, tight bends, or missing protective sleeves can create stress points in plumbing systems beneath slabs or floors. Over time these weaknesses can lead to cracks or pipe failure.
These issues don’t fix themselves—and they rarely get noticed until they’ve caused real damage. That’s why our leak detection experts work fast to identify the cause and stop it at the source.
Precision Slab & Underfloor Leak Detection Matters
Every underfloor or slab leak is different, but the approach should always be the same — careful diagnosis before any repair begins. Our Melbourne leak detection specialists focus on accurate, non-invasive detection, locating hidden water leaks beneath concrete slabs and timber floors without unnecessary damage.
No wild digging. No guesswork. Just clear answers and the right repair.
Our Process: Detect – Repair – Protect:
🔍 Step 1: Detect
We begin with non-invasive leak detection, using acoustic sensors, thermal imaging, tracer gas, and pressure testing to locate the exact point of failure—under slab, through concrete, or beneath timber flooring.
Our leak detection specialists are trained to interpret signs and signals without damaging your home.
🔧 Step 2: Repair
Once we’ve found the source, we get to work. That may involve exposing a small section of slab or floor to reach the pipe, replacing damaged copper or poly pipe, or upgrading aged infrastructure.
We also repair degraded galvanised water lines, split copper sections, or faulty joins that often cause slab leaks—always with long-term solutions, never temporary fixes.
🛡️ Step 3: Protect
After the repair, we pressure-test your system, inspect nearby sections for future risks, and advise on next steps if needed.
This could include system upgrades, valve protection, or preventative leak detection measures to stop problems before they start.
From first inspection to final seal, we treat your home like our own -because proper plumbing protection starts with respect.
Get the Plumber you deserve!
Leak Detection Requires Skill. That’s Why Customers Call Us.
Hidden slab and underfloor leaks require more than guesswork — they require experience, precision and the right equipment. Our Melbourne leak detection specialists focus on locating and repairing hidden plumbing leaks beneath floors and concrete slabs with minimal disruption to your home.
Here’s why Melbourne homeowners trust us to locate and fix these challenging plumbing problems:
✅ Leak Detection Specialists
We’re not general plumbers trying to “find a leak” — it’s what we specialise in. Our team focuses on slab leak detection, underfloor plumbing leaks and hidden water pipe failures across Melbourne homes. With the right tools and experience, we locate leaks quickly and accurately without unnecessary excavation or guesswork.
✅ Targeted, Non-Destructive Testing
Finding leaks beneath slabs and floors requires precision. We use acoustic leak detection, thermal imaging, moisture sensors and pressure testing to pinpoint the exact location of hidden leaks beneath concrete slabs and timber floors. This allows us to investigate problems without ripping apart your home.
✅ We Repair, Not Just Detect
Many leak detection companies simply locate the problem and leave the repair to someone else. At Detect & Repair, we handle the entire process — detecting the leak, repairing the pipe and pressure-testing the system to ensure everything is working correctly. One team, one solution.
✅ 25+ Years of Plumbing Experience
Our experience with Melbourne residential plumbing systems allows us to quickly identify the most common causes of slab and underfloor leaks. From ageing copper pipes and galvanised lines to high mains pressure failures, we’ve seen — and repaired — it all.
✅ Clear Communication. No Pressure.
Plumbing problems can be stressful, especially when the issue is hidden beneath your home. We explain the problem clearly, outline your repair options and provide upfront pricing before any work begins. No pressure. Just honest advice and the right solution.
Our reputation is built on care, trust and doing the job right—not just ticking the box. That’s why we’re called out again and again by Melbourne families who want plumbing handled with attention and respect.
Your Melbourne Service
Signs You Might Have a Leak Under Your Floor or Slab
Hidden plumbing leaks beneath slabs or subfloors often develop slowly, but your home usually shows warning signs before major damage occurs. If you notice any of the following symptoms, a leak beneath your concrete slab or underfloor plumbing system may be the cause.
Here are the most common signs we investigate across Melbourne homes with in-slab or underfloor pipe leaks:
🚩 Key Warning Signs:
💸 Unexpectedly high water bills
A sudden increase in your water bill without higher usage is one of the most common indicators of a hidden water leak. Slab leaks and underfloor pipe failures can waste thousands of litres of water every week before the problem becomes visible.
If your water usage habits haven’t changed but your bill continues to rise, a mains pressure pipe leaking beneath your slab or floor may be the cause. Early leak detection helps stop ongoing water loss and prevents further plumbing damage.
🪵 Damp, Warped or Swollen Floorboards
Timber flooring is highly sensitive to moisture. When a pipe leaks beneath a floor or concrete slab, water can slowly rise through the subfloor or slab structure and begin affecting the flooring above.
Over time, boards may start to cup, swell, lift or feel soft underfoot. If left untreated, continuous moisture can damage flooring materials and surrounding structures, making underfloor leak detection essential to identify and repair the source.
🔊 Hissing or running water sounds
If you hear water moving through pipes when no taps, appliances or toilets are running, it may indicate a hidden leak within your plumbing system. These sounds are often caused by mains pressure water escaping from a cracked pipe beneath the slab or subfloor area.
Even a small pipe fracture can create constant water movement within the plumbing system. Identifying the source quickly helps prevent ongoing water loss and avoids further damage to the surrounding structure.
🌫️ Musty smells or mould growth
Persistent moisture beneath floors creates ideal conditions for mould and mildew to develop. A musty smell inside the home can be an early sign that moisture is accumulating beneath the slab or within the underfloor cavity.
Hidden leaks may allow water to slowly spread through insulation, timber structures or surrounding materials before visible damage appears. Professional leak detection helps locate the source and prevent long-term mould and moisture issues.
🧱 Cracks in walls or slab movement
Water leaking beneath foundations can gradually affect soil stability around the home. As the ground shifts or softens, the slab above may begin to move, creating cracks in walls, tiles, skirting boards or flooring.
While not every crack indicates a plumbing issue, long-term slab leaks can contribute to structural movement. Identifying hidden leaks early can help prevent further damage to the building structure.
🔥 Warm Spots on Floors
If the leak is coming from a hot water pipe beneath the slab, you may notice areas of flooring that feel unusually warm. This is particularly noticeable on tiled or concrete floors where heat can transfer through the surface.
Warm patches often indicate a leaking hot water line buried within the slab, which can allow heated water to escape continuously. Detecting and repairing these leaks quickly helps prevent wasted energy, water loss and damage to surrounding materials.
🌱 Damp Soil or Unusual Garden Growth
Water escaping from pipes beneath slabs can sometimes travel outward through surrounding soil before becoming visible outside the home. This can appear as soggy patches in the garden, damp paving or unusually green areas of lawn near the foundation.
These signs may indicate a hidden water leak beneath the slab or along the underground mains supply line. Identifying the source early helps prevent further underground water loss and protects the structural integrity of the property.
Think it might be a pipe burst below your floor?
We’ll find the source—without ripping your home apart”
We can assess, repair, and protect in one visit—often before things turn critical.
In-Slab & Underfloor Leak Detection Across Melbourne
Hidden plumbing leaks beneath concrete slabs and timber floors can occur in homes across Melbourne, particularly in properties with ageing pipework, high mains pressure or shifting soil conditions.
Our Melbourne leak detection specialists locate and repair slab leaks, underfloor plumbing failures and hidden water pipe bursts using advanced acoustic sensors, thermal imaging and pressure testing. This allows us to accurately detect water leaks beneath concrete slabs, subfloors and underground supply lines without unnecessary excavation.
Whether you’re dealing with a mains pressure pipe leaking beneath a concrete slab in Glen Iris, damp flooring caused by an underfloor pipe leak in Brighton, or unexplained water loss from a hidden plumbing leak in Mornington, our experienced plumbers respond quickly with the tools and knowledge to diagnose the issue properly.
We specialise in slab leak detection, underfloor leak repair and hidden pipe investigation across Melbourne homes, providing accurate diagnostics and long-lasting repairs that protect your property.
No stress. No guesswork. Just expert leak detection and plumbing repairs carried out with care and respect for your home.
Wherever you’re located across Inner Melbourne, the South East suburbs, Bayside or the Mornington Peninsula, our team is ready to help locate and repair hidden plumbing leaks beneath your home.
Slab Leak Detection Melbourne - Inner city suburbs where we help our customers
- Abbotsford
- Burnley
- Carlton
- Carlton North
- Clifton Hill
- Collingwood
- Cremorne
- Docklands
- East Melbourne
- Fairfield
- Fitzroy
- Fitzroy North
- Flemington
- Kensington
- Melbourne (3000)
- North Melbourne
- Parkville
- Princess Hill
- Richmond
- Southbank
- West Melbourne
Slab Water Leak Detection Melbourne - South East suburbs where we help our customers
- Armadale
- Ashburton
- Ashwood
- Burwood
- Burwood East
- Camberwell
- Carnegie
- Caulfield
- Caulfield East
- Caulfield North
- Caulfield South
- Chadstone
- Clayton
- Clayton South
- Glen Huntly
- Glen Iris
- Glen Waverley
- Hawthorn
- Hawthorn East
- Heatherton
- Hughesdale
- Huntingdale
- Kooyong
- Malvern
- Malvern East
- McKinnon
- Mount Waverley
- Mulgrave
- Murrumbeena
- Notting Hill
- Oakleigh
- Oakleigh East
- Oakleigh South
- Ormond
- Prahran
- Rowville
- Scoresby
- South Yarra
- Toorak
- Upper Ferntree Gully
- Wantirna
- Wantirna South
- Wheelers Hill
- Windsor
Melbourne Bayside Underfloor Leak? Suburbs where we help our customers
- Albert Park
- Aspendale
- Aspendale Gardens
- Balaclava
- Beaumaris
- Bentleigh
- Bentleigh East
- Black Rock
- Bonbeach
- Braeside
- Brighton
- Brighton East
- Carrum
- Chelsea Heights
- Cheltenham
- Edithvale
- Elsternwick
- Elwood
- Gardenvale
- Hampton
- Hampton East
- Highett
- Mentone
- Middle Park
- Moorabbin
- Mordialloc
- Parkdale
- Port Melbourne
- Ripponlea
- Sandringham
- South Melbourne
- Southbank
- St Kilda
- St Kilda East
- St Kilda West
Mornington Peninsula Hidden Leak Specialist - Suburbs where we help our customers
- Arthurs Seat
- Bittern
- Boneo
- Capel Sound
- Crib Point
- Dromana
- Flinders
- Hastings
- McCrae
- Merricks
- Moorooduc
- Mornington
- Mount Eliza
- Mount Martha
- Portsea
- Red Hill
- Red Hill South
- Rosebud
- Rye
- Safety Beach
- Shoreham
- Somers
- Somerville
- Sorrento
- Tootgarook
- Tyabb
Under Floor Burst Pipe Frankston - Suburbs where we help our customers
- Carrum Downs
- Frankston
- Frankston North
- Frankston South
- Langwarrin
- Langwarrin South
- Sandhurst
- Seaford
- Skye
Burst Pipe In Slab - Dandenong suburbs where we help our customers
- Beaconsfield
- Berwick
- Dandenong
- Dandenong North
- Dandenong South
- Endeavour Hills
- Eumemmerring
- Hallam
- Hampton Park
- Junction Village
- Keysborough
- Lyndhurst
- Lynbrook
- Narre Warren
- Narre Warren North
- Narre Warren South
- Noble Park
- Noble Park North
- Springvale
- Springvale South
Hidden Leak Experts - Melbourne Eastern suburbs where we help our customers
- Balwyn
- Balwyn North
- Bayswater
- Bayswater North
- Blackburn
- Blackburn North
- Blackburn South
- Boronia
- Box Hill
- Box Hill North
- Box Hill South
- Canterbury
- Croydon
- Croydon Hills
- Croydon North
- Croydon South
- Deepdene
- Ferntree Gully
- Forest Hill
- Heathmont
- Kew
- Kew East
- Kilsyth
- Kilsyth South
- Knoxfield
- Lysterfield
- Mitcham
- Mont Albert
- Nunawading
- Ringwood
- Ringwood East
- Ringwood North
- Surrey Hills
- The Basin
- Vermont
- Vermont South
- Warranwood
Concealed Water Leak Detection - Melbourne North suburbs where we help our customers
- Alphington
- Bulleen
- Doncaster
- Doncaster East
- Donvale
- Fairfield
- Park Orchards
- Templestowe
- Templestowe Lower
- Warrandyte
- Warrandyte South
- Wonga Park
Book your way – Call us today!
“Detect & Repair found the leak under our slab quickly and fixed it with care. Everything was handled calmly and professionally. We couldn’t be happier." Anne & David, Malvern East
Questions We’re Often Asked About In-Slab & Underfloor Leaks
How do I know if I have an in-slab or underfloor water leak?
Rising water bills, unexplained dampness, musty smells, and floor movement are key signs. If your meter is spinning when no taps are on, it’s time to investigate.
Do you need to dig up my floors to find the leak?
Not usually. We use non-invasive leak detection tools like acoustic listening devices and thermal imaging to pinpoint the problem before accessing any pipework.
What happens once you find the leak?
Once located, we provide a clear explanation and quote for repair. In most cases, we carefully expose a small area, fix the burst pipe, and pressure test the system – all with minimal disruption.
Can these types of leaks damage my home?
Yes – slow leaks can cause structural slab movement, timber rot, mould growth, and damage to flooring or insulation. Early leak detection is the key to limiting damage.
Do you handle the actual repairs, or just find the leak?
We do both. Unlike some leak detection companies, we don’t walk away once the leak is found – we see it through with licensed plumbing repairs and ongoing protection.
What types of pipes usually leak under floors?
We often see copper, PEX, poly, and galvanised steel pipes beneath Melbourne homes. Galvanised systems, in particular, are prone to corrosion and should be assessed early.
How do you detect a water leak beneath a concrete slab?
Locating a leak beneath a concrete slab requires specialised equipment and experience. Our Melbourne leak detection specialists use acoustic listening devices, thermal imaging cameras, moisture sensors and pressure testing to pinpoint hidden water leaks beneath floors and slabs without unnecessary demolition. These non-invasive methods allow us to accurately locate the source of the leak before any repair work begins.
How long does slab leak detection take?
Most slab leak investigations can be completed within one to two hours, depending on the complexity of the plumbing system and the location of the leak. Our goal is always to locate the source quickly using precise detection tools so repairs can begin without delay.
Can you help even if I’m not sure there’s a leak?
Yes – we offer diagnostic testing for properties with damp issues, floor movement, or suspected water damage. Our equipment helps determine if plumbing is the source.
Do you service homes with concrete, timber, or mixed flooring?
Absolutely. Whether your pipes run beneath concrete slabs, floorboards, floating floors or hybrid systems, we adapt our approach for safe and effective detection and repair.
Which suburbs do you cover?
We service all of Inner South East Melbourne, Bayside, and the Mornington Peninsula, including Glen Iris, Brighton, Caulfield, Mornington, Mount Eliza, Dandenong and more.
Not sure if we cover your suburb? Just give us a call—we’re always happy to help.
What causes pipes to leak beneath a slab?
Slab leaks are usually caused by ageing pipework, high mains water pressure, ground movement, poor installation or corrosion of buried copper or galvanised pipes. In Melbourne homes, seasonal soil movement and long-term pipe deterioration can place stress on pipes beneath concrete slabs, eventually causing cracks or bursts.
Can a slab leak damage my home?
Yes. A hidden water leak beneath a slab can gradually cause structural movement, flooring damage, mould growth and increased water bills. If water continues leaking beneath the foundation, it may also affect soil stability around the home. Early leak detection helps prevent more serious structural and plumbing damage.
Do you need to break the slab to find a leak?
In most cases, no. Modern leak detection methods allow plumbers to locate the exact position of a leak beneath a slab before any excavation occurs. Once the source is confirmed, only a small targeted access point is needed to repair the pipe.
Why Early Slab Leak Detection Matters
Leaks beneath concrete slabs or underfloor plumbing systems rarely stop on their own. Even a small pipe fracture can allow water to escape continuously beneath the home, slowly affecting surrounding soil, flooring materials and structural elements.
Over time, hidden slab leaks may contribute to rising water bills, moisture damage, mould growth and movement within the foundation. Detecting the problem early allows plumbers to locate the leak accurately and carry out targeted repairs before more serious structural or plumbing damage occurs.
Professional slab leak detection and underfloor plumbing inspection helps homeowners protect their property, reduce ongoing water loss and restore confidence in the safety of their plumbing system.
Get it fixed properly—today.
Don’t wait for rising water bills, warped floorboards or mouldy smells to tell you something’s wrong.
Our Melbourne leak detection specialists will locate the issue, repair it with care, and help protect your home from future water damage.
Call Detect & Repair now for expert in-slab leak detection and repair—done properly, the first time.
What you get
Accurate leak detection with no guesswork
Professional burst pipe repair, backed by experience
Honest advice and long-term protection
Rapid service across South East, Eastern Melbourne as well as Mornington Peninsula.
Proudly trusted by Melbourne homeowners for reliable plumbing repairs and peace of mind.
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