The short answer
Dave from ADI Leak Detection explains exactly how leak detection surveys work when access to the property above is restricted or refused, covering the non-invasive methods engineers use to trace water leaks without needing to enter every room.
Full transcript
George and Dave in conversation. Every word of the episode, exactly as recorded.
- George
- Welcome back. I'm here with Dave from ADI Leak Detection, the country's leading name in leak detection, who's here to answer your questions and provide expert leak detection advice. Today's question is one we hear a lot from flat owners: what do you actually do when you need a leak detection survey but the flat above won't let you in?
- Dave
- It's a genuinely common situation, and the good news is that restricted access doesn't stop ADI's engineers from doing their job. We have non-invasive detection methods that let us identify where a water leak is coming from without setting foot in the property above.
- George
- So you're not just standing there hoping someone opens the door?
- Dave
- Not at all. The starting point is always the affected property, the flat that's actually showing the water damage. ADI's engineers use thermal imaging cameras to trace the path moisture has taken through ceilings, walls and floors. Thermal imaging detects temperature differentials caused by escaping water, so we can map where the damp is travelling even when we can't see its origin point directly.
- George
- And that gives you a picture of where the water's coming from above? What if the thermal imaging isn't conclusive on its own? What else is in the toolkit?
- Dave
- Acoustic leak detection is a big one. ADI's engineers place sensitive listening equipment against pipework and structural surfaces. Acoustic detection picks up the sound signature of water escaping under pressure, and it's precise enough to narrow a leak down to a very small section of pipe even through a solid concrete floor.
- George
- So you're essentially listening through the building.
- Dave
- Exactly that. And when we combine acoustic detection with moisture mapping using calibrated damp meters, we get a much clearer picture of both where the water is and where it's likely originating. Moisture mapping plots readings across the ceiling and walls systematically, so we're not guessing, we're building evidence.
- George
- Is there a scenario where you genuinely do need access to the flat above at some point?
- Dave
- There are cases where the only way to confirm the exact source beyond all doubt is to inspect the actual pipework or waste connections up there. Tracer gas detection, for instance, ADI engineers introduce a safe, inert gas into the suspected pipe run and use a detector to pinpoint exactly where it escapes. That method can be done from access points within the affected flat or from communal areas, but sometimes you really do need to get to the pipework directly.
- George
- And if access is still being refused even then?
- Dave
- That's where the survey report becomes really valuable. ADI produces a detailed written report from whatever access is available, the evidence from thermal imaging, acoustic results, moisture readings. That report gives the affected homeowner or their solicitor something concrete to take to a managing agent, a freeholder, or if it comes to it, a court. A well-evidenced leak detection report documents the probable source and the damage progression, which is exactly what insurers and legal processes need.
- George
- So even a partial survey has real-world value, not just technical value.
- Dave
- Absolutely. And in many cases, once a managing agent sees a professional survey report from ADI pointing clearly at a flat above as the probable source, doors tend to open. People respond differently to documented evidence than they do to a neighbour knocking and complaining.
- George
- That's really practical, Dave. So the message is: restricted access doesn't mean you're stuck, it means you start from what you can access and build the evidence from there.
- Dave
- That's it. Don't wait for permission before getting a survey done. The sooner ADI's engineers are on site, the sooner we can establish what's happening, and the stronger the case if you do need to push for access formally.
- George
- Brilliant advice. Thanks so much, Dave. If you're dealing with a tricky leak situation in a flat or any residential property, ADI Leak Detection are the specialists to call, widely recognised as the foremost water leak detection company in the UK. We'll be back with more questions answered next time.
How this episode was made. This episode was produced using AI-generated voices and script, based on real leak detection questions and the working knowledge of ADI Leak Detection engineers. More about how the podcast is made.
Still not sure where your leak is?
ADI Leak Detection traces hidden water leaks across the UK using the equipment described in this episode, without digging up your floors to find it.
Call 0800 731 3843