AEPMA-certified timber pest specialists • Clyde North to greater Melbourne
Subterranean termite symptoms in Victoria are often subtle — a mud tube along a stump, hollow-sounding timber behind a skirting board, a door that suddenly sticks. Learn exactly what to look and listen for, and how professional thermal imaging catches hidden damage a visual check alone will miss, before it compromises your home's structural integrity.
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Included on inspections
Same-day digital target
Hidden colony detection
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Clyde North to CBD
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Why early detection matters
Subterranean termites work silently, hidden inside wall cavities, subfloors and roof voids, often for months or years before any sign becomes visible above the surface. By the time damage is obvious to the naked eye, a colony may already have compromised load-bearing timber. Catching the early, subtle signs is what keeps a termite problem a minor, affordable fix instead of a major structural repair.
A mature subterranean colony can consume the cellulose core of load-bearing studs, joists and bearers while leaving the painted surface almost untouched. Left long enough, that hidden hollowing can lead to sagging floors, cracked cornices and, in extreme cases, structural failure of a wall or roof section.
A diagnostic inspection and early-stage treatment is a fraction of the cost of structural timber replacement, re-stumping or wall reconstruction. The earlier a warning sign is confirmed and acted on, the smaller and cheaper the fix.
Most home and contents insurance policies exclude gradual termite damage, and undisclosed or unresolved termite activity can complicate a property sale or building inspection. A documented, professional inspection report protects you either way.
Know exactly what to look and listen for
These are the physical and behavioural indicators our technicians train property owners to check for between annual inspections. None of them confirm a colony on their own — but any one of them is reason enough to book a professional diagnostic assessment.
Mud-like tunnels built across brickwork, concrete footings, stumps and subfloor walls, protecting subterranean termites from drying air as they travel between the soil and a timber food source. A mud tube on an external wall is one of the clearest, most reliable signs of an active colony — it means termites have already built a safe corridor into the structure above.
Skirting boards, architraves or flooring that sound paper-thin or drum-like when tapped with a knuckle or the handle of a screwdriver, because the internal cellulose has been eaten away while the painted surface stays largely intact. This is one of the most accessible DIY checks — but a hollow sound only tells you where to probe further, not how far the damage extends.
Structural distortion caused by subterranean colonies eating through load-bearing framing timbers, bearers and joists. A floor that has developed a slight bounce or dip, or a door and window that has started sticking without an obvious cause (like humidity or a settling foundation), can indicate the frame behind it has lost structural integrity.
Small, gritty, sand-like pellets (frass) — the discarded droppings of drywood termites — collecting near window sills, skirting boards or beneath furniture, often alongside tiny "kick holes" in the timber. Discarded, papery wings scattered near doors, windows or light fittings after a warm evening indicate an active swarm has just occurred and a colony is establishing nearby.
Bubbled, peeling or water-stain-like discolouration on wall or ceiling paint that hides a subterranean gallery eating just beneath the surface, or the moisture that colony activity brings with it. Because this looks so similar to ordinary water damage or a plumbing leak, it's one of the most commonly misdiagnosed warning signs — and exactly the kind of hidden activity thermal imaging is built to confirm.
Why professional diagnosis beats a DIY check
A hollow-sounding skirting board or a screwdriver probe can flag that something is wrong. Only a licensed diagnostic inspection can tell you how far it extends, whether the colony is still active, and what's hidden behind plaster, under flooring or in the roof void.
| Diagnostic Method | Thermal Imaging Accuracy | Subfloor / Roof Void Access | AS 4349.3 Reporting | Hidden Colony Detection |
|---|---|---|---|---|
| TIM's Professional Diagnostic Inspection | ★★★★★ Full thermal + moisture scan | ✓ Full access & inspection | ✓ Formal compliant report | ★★★★★ Excellent |
| DIY Visual Checks | ✗ None | ⚠️ Limited, untrained access | ✗ No report | ★ Poor — surface signs only |
| Hardware Store Probes / Detectors | ✗ None | ⚠️ Point-testing only | ✗ No report | ★★ Fair — where you happen to probe |
| Basic Handyman Assessment | ✗ None | ⚠️ Variable, not specialist-trained | ✗ Informal opinion only | ★★ Fair — general building knowledge, not species-trained |
Local conditions, local risk
Melbourne's climate and soil profile are close to ideal for subterranean termite activity, which is why vigilance and regular professional inspection matter as much here as anywhere in Australia.
The reactive clay soils common across greater Melbourne expand and hold moisture near foundations, creating exactly the damp, stable micro-climate subterranean termite colonies need to establish and travel to timber above ground.
Older weatherboard and brick-veneer homes with restricted subfloor airflow, along with garden beds, mulch and retained timber built up hard against the foundation, all raise the moisture level that draws colonies toward a property.
Coptotermes species, among the most destructive subterranean termites in Australia, are well established across Victoria. Colonies can number in the hundreds of thousands and consume timber quickly once they establish a feeding route into a structure.
When warning signs are missed for an extended period, a full termite damage assessment often reveals hollowed wall studs, weakened bearers and joists, cracked cornices from floor movement, and — in the most advanced cases — sections of structural timber requiring full replacement. Every one of these outcomes traces back to signs that were present, visible and diagnosable, months or years earlier.
Learn about our termite damage assessment serviceBeyond the naked eye
Every diagnostic inspection combines trained visual assessment with purpose-built detection equipment, so signs invisible to a walk-through are caught and documented.
🌡️ Thermal Imaging Camera
Maps temperature variance behind plaster and flooring to flag moisture and hidden colony activity before any surface is opened up.
💧 Moisture Meter
Confirms elevated moisture readings in timber and subfloor framing — the conditions termites need and a key corroborating data point alongside thermal imaging.
🔨 Sounding & Probing Tools
Calibrated tapping and probing of skirting, architraves and structural timber to physically confirm any hollow or softened section a thermal reading identifies.
🔦 Roof Void & Subfloor Access Kit
Headlamps, borescopes and confined-space access equipment to physically inspect roof voids and subfloor areas that a visual walk-through of living spaces cannot reach.
Methodical, evidence-based, fully reported
When you book a diagnostic inspection after noticing a warning sign, here's exactly what happens.
We inspect accessible timber, skirting, architraves, external walls, stumps and footings for mud tubes, hollow sounds, frass and paint discolouration — the same signs covered in this guide, checked systematically.
A thermal camera scans walls, ceilings and flooring for temperature and moisture anomalies that indicate hidden activity behind intact surfaces, directing the inspection to the areas that need closer attention.
Where access allows, the subfloor and roof void are physically inspected — the areas a visual walk-through of living spaces cannot reach and where colonies frequently establish undetected.
Findings are compiled into a formal, AS 4349.3-aligned report with a same-day digital delivery target, along with a clear treatment recommendation if activity is confirmed.
Prices shown before GST. Includes moisture assessment and a same-day digital report target; commercial and larger or unusual sites receive a custom on-site quote.
Small
1–2 bed unit or apartment
$270
+ GST
Medium
3 bed house
$300
+ GST
Large
4+ bed house
$330
+ GST
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Verified customer reviews
“Noticed a mud tube on the back stump and called straight away. The thermal camera picked up damage behind the laundry wall we would never have found ourselves. Caught early and treated fast.”
“The skirting board sounded hollow so I booked an inspection. Turned out termites had already reached the frame. So glad we caught it when we did — could have been a lot worse.”
“Doors had started sticking and I put it down to the weather. The inspection found active termites in the subfloor. Detailed report, thermal images included, explained everything clearly.”
“Saw winged termites near the window one evening and called the next morning. Same-day inspection confirmed a nearby colony. Quick, professional and reassuring.”
“Paint had started bubbling on a bedroom wall and I assumed it was a leak. Turned out to be termite damage. The moisture meter and thermal scan found it fast.”
“As a local business we appreciated the fast response. Full AS 4349.3 report same day with clear photos of every warning sign they found. Exactly what we needed for our records.”
Credentials you can verify
Every technician who inspects your property for warning signs is qualified, background-checked and trained specifically in timber pest diagnostics — not a generalist subcontractor.
Current pest-management licence and full public-liability insurance. Certificates available on request before we start.
Members of the Australian Environmental Pest Managers Association, trained to national best-practice diagnostic standards.
Every diagnostic inspection is documented to the Australian Standard for timber pest inspection reports — the standard insurers, buyers and lenders recognise.
Every technician is background-checked and Melbourne-based — the same trusted faces at your door, every visit.
Answers before you book
The earliest signs are usually the quietest ones: thin mud (shelter) tubes running up an external brick wall, a stump or a subfloor pier; skirting boards or architraves that sound papery or hollow when tapped; and doors or windows that have started sticking for no obvious reason. Discarded, papery wings near window sills after a warm, humid evening are another early tell — that is a termite swarm looking for a new site to colonise, and it means an active colony is already close by. Because subterranean termites (the dominant risk species in Melbourne) work from the inside out, most early activity is invisible until you know exactly what to tap, probe and look for.
A screwdriver or similar probe test can flag a problem — if the tip sinks easily into skirting, an architrave or a stump with little resistance, or the timber sounds hollow when tapped, that is a red flag worth acting on. What it cannot do is tell you how far the damage extends, whether the colony is still active, or what is happening inside wall cavities, behind plaster, under flooring or in the roof void, none of which a screwdriver can reach. A DIY probe test is a useful early-warning habit, not a substitute for a licensed AS 4349.3 inspection with thermal imaging and moisture assessment.
Subterranean termites need a humid, dark micro-climate to survive — direct exposure to open air dries them out within hours. Mud tubes (also called shelter tubes) are how they solve that: they build enclosed tunnels from soil, saliva and chewed timber across bare surfaces like brick footings, concrete stumps, piers and subfloor walls, giving the colony a protected, moisture-controlled route from the soil to a timber food source above. Finding a mud tube on an external wall means termites have already built a safe corridor into your home's timber — it is one of the clearest and most reliable visual warning signs there is.
Termite galleries and the moisture that comes with an active colony change how a surface holds and releases heat compared with the timber and plaster around it. A thermal imaging camera reads those subtle temperature differences across a wall, ceiling or floor and displays them as a colour-mapped image, highlighting cooler or warmer patches that correlate with hidden voids, moisture and termite activity behind an intact, undamaged-looking surface. It does not replace a physical inspection, but it directs the inspector straight to the areas that need a closer probe, moisture-meter reading or targeted access point — finding problems that a purely visual walk-through, DIY or otherwise, would miss entirely.
Do not disturb them, spray them, or poke at the mud tube or timber — disturbing an active colony can cause it to retreat deeper into the structure or relocate to a harder-to-treat area, making the job more difficult later. Leave the area undisturbed, note down where you saw the activity (room, wall, approximate height), and call a licensed technician for an urgent diagnostic inspection as soon as possible — same-day appointments may be available depending on your suburb and route. The goal is to let a professional map the full extent of the colony with thermal imaging and moisture assessment before any treatment decision is made.
A full AS 4349.3-aligned termite inspection with moisture assessment starts at $270 + GST for a small property, $300 + GST for a medium 3-bedroom home, and $330 + GST for a large property, with a same-day digital report targeted where possible. Commercial buildings and larger or unusual sites require a custom on-site quote rather than a fixed online price. Your exact GST-inclusive total is confirmed in the booking calculator before you enter any personal details, and licensed technician attendance is included in every price shown.
Yes. Melbourne's dominant risk is subterranean termites (notably aggressive Coptotermes species), which need soil contact or a moisture source and give themselves away through mud tubes, damp-affected paint and timber that stays cool and hollow-sounding near ground level or in the subfloor. Drywood termites are less common locally but do not need soil contact at all — instead, look for small, gritty, sand-like faecal pellets (frass) pushed out of tiny "kick holes" in furniture, skirting or roof timbers, along with discarded wings after a swarm. Because the two types nest, feed and present differently, correct species identification during inspection changes both the diagnosis and the treatment plan.
Industry guidance and most home insurance and building-warranty requirements recommend a minimum of one professional termite inspection every 12 months, and every 6 months for properties in higher-risk areas — those with established gardens close to the foundation, known clay soils, timber-in-ground contact, or a prior history of termite activity nearby. An annual inspection is what catches early warning signs (a fresh mud tube, a newly hollow-sounding skirting board) while treatment is still simple and inexpensive, well before the sagging floors and structural repairs that come with a colony left undetected for years.
Don't wait for a mud tube to become a sagging floor. Speak directly with our certified Melbourne termite experts and dispatch an urgent thermal-imaging diagnostic inspection today — save $250 off complete barrier treatments plus a free thermal scan ($150 value) when you book this week.
🎯 Offer ends 15th September 2026 • ✓ Licensed & Insured • ✓ 4.9★ Rated
