A leak rarely announces itself politely. More often it shows up as a damp patch that never quite dries out, a musty smell in a wardrobe or hallway cupboard, or a stain on the ceiling that reappears after every heavy downpour. Whatever brought you to ask the question, the underlying problem is usually the same: something is happening inside your home that you cannot see, and fixing it properly means finding the exact source, not just confirming that a problem exists.

This is where track and trace leak and moisture detection comes in. Rather than a general visual check, it is a dedicated investigation aimed squarely at answering one question: where is this coming from?

What is track and trace leak detection?

Track and trace leak detection is a focused diagnostic service for situations where you already suspect, or have started to notice signs of, a leak or elevated moisture, but the source isn't obvious. It sits within our broader Moisture and Leak Detection service, and differs from a general pre-purchase or pre-listing building inspection in one key way: the starting point is a specific concern (a stain, a smell, or a damp patch that keeps returning), and the goal is to trace it back to its origin.

We combine a high-specification infrared thermal camera with a non-invasive moisture meter capable of detecting subsurface moisture up to 200mm below the surface. The thermal camera identifies different temperature anomalies across walls, ceilings and floors that may indicate the presence of moisture, since wet materials retain and release heat differently to dry materials, and this shows up clearly to an infrared lens even when there is nothing visible to the naked eye or noticeable to the touch. Once a thermal anomaly is identified, the moisture meter confirms it, without drilling, cutting, or otherwise damaging your property.

Leaks have nowhere to hide

Hidden leaks tend to cluster around a handful of common problem areas. We regularly trace moisture back to:

Roof leaks

Water entering through ageing roof coverings, damaged flashings, or blocked guttering doesn't always drip straight down. It can travel along framing timber or sarking before it ever reaches a ceiling, meaning the stain you can see is often nowhere near the actual point of entry. Thermal imaging lets us trace the path back to source, rather than guessing based on where the damage has surfaced.

Cladding and joinery leaks

All types and age of building construction can leak. Auckland has a well-documented history of monolithic cladding systems (plaster or stucco applied directly over timber framing, common on homes built through the 1990s and early 2000s) that are prone to water ingress at flashings, joints and penetrations. Window and door joinery seals are another frequent entry point. Because these leaks often occur within the cavity behind the cladding, they can progress for years without any visible sign inside the home.

For a deeper look at this specific risk category, see our Weathertightness Reports service, which focuses specifically on cladding and joinery risk.

Bathroom and plumbing leaks

Failed shower waterproofing membranes, deteriorated silicone at wall and floor junctions, and ageing pipework are among the most common sources of contained but serious water damage. Because bathrooms are designed to handle water, early signs of a leak are often masked, and by the time staining or a soft floor becomes apparent, the framing beneath may already be compromised.

Unexplained elevated moisture

Sometimes there is no visible stain, no obvious smell, and no single event to point to, just a persistent, elevated moisture reading, a consistently damp-feeling room, or a health concern prompting a closer look. In these cases, a track and trace inspection is used diagnostically: to establish whether an issue genuinely exists, and if so, where it is coming from, before any remedial work is planned or budgeted for.

Why this matters more in Auckland

Auckland's damp, humid climate combines with a significant stock of older properties, including many from the leaky home era, to make hidden moisture one of the most common and costly problems local homeowners face. Left untraced, a slow leak can quietly rot framing and enable mould growth well before any visible sign appears from inside the home.

We provide this service across the wider Auckland region, including North Shore, Central Auckland, East Auckland, South Auckland and West Auckland.

A confidential, non-invasive process

Every finding is treated with complete confidentiality. Whether you are a homeowner investigating a private concern, a landlord assessing a rental property, or an agent managing a sale, you can expect the process, and any results, to be handled discreetly and shared only with you, the client. The inspection itself is entirely non-invasive: no drilling, no cutting, and no damage to finishes or linings. We find the problem without creating a new one in the process.

What you receive

Every track and trace inspection concludes with a clear, written digital report, including:

  • Annotated thermal images showing the location and extent of any anomalies detected
  • Moisture meter readings, with precise locations and comparative benchmarks
  • A plain-language explanation of what each finding means and its likely cause
  • Recommended next steps, from monitoring through to urgent remediation, so you know exactly what to do next

If you are already working with a builder, insurer, or body corporate, this report is designed to give them exactly what they need to scope any repair work with confidence.

Your written report is available within 24 hours on request. Subject to the client's brief, most leaks are found within 30 minutes, though some more complex inspections may take considerably longer. We are persistent in identifying the source. Leaks have nowhere to hide.

Selling your house and found an issue?

You may not have enough information to make an informed decision. A prospective purchaser's building inspection may have identified elevated moisture in your home. Unexpected findings can weaken your negotiating position and even jeopardise the sale. Before that happens, regain control by contacting HSBI for an independent assessment to verify whether a genuine moisture anomaly exists. Clear evidence can help resolve disagreements about any proposed price reduction. Learn more about our Pre-Listing Thermal Imaging Inspections.

Frequently asked questions

What's the difference between this and a general building inspection?

A building inspection is a broad assessment of a property's overall condition, usually carried out before a purchase, sale, or as a periodic check. Track and trace leak detection is a targeted investigation aimed at a specific concern, a known or suspected leak, or unexplained moisture, with the goal of finding its exact source. The two services use the same core technology and are often combined.

Will you need to cut into my walls or ceiling to find the leak?

No. Our entire process is non-invasive. Thermal imaging and moisture meters allow us to detect and confirm moisture through existing surfaces and linings, without any drilling, cutting, or damage to your property.

I don't have a visible leak, just a bad smell or an unexplained damp patch. Can you still help?

Yes. This is one of the most common reasons clients contact us. A persistent smell, an ongoing damp feeling in a room, or a water bill that doesn't add up are all valid reasons to investigate, even without a visible source. Our diagnostic approach is designed for exactly this situation.

Is this service confidential?

Yes, completely. All findings are treated with full confidentiality and shared only with you, whether you are the homeowner, a landlord, or an agent managing the property on someone else's behalf.

Can leak detection be combined with a building inspection?

Yes. Many clients combine a track and trace investigation with a broader pre-purchase building inspection, pre-listing, or weathertightness inspection in a single visit. Ask us when booking and we can scope the right combination for your situation.