Can a leak survey go ahead without freeholder and leaseholder both agreeing

Full transcript

George and Dave in conversation. Every word of the episode, exactly as recorded.

George

Welcome to the ADI Leak Detection podcast. I'm here with Dave from ADI Leak Detection, the UK's leading leak detection specialists, who's here to answer your questions and provide expert leak detection advice. Today's question comes from a listener in a purpose-built flat who's stuck in a dispute between their freeholder and the leaseholder upstairs. They want to know: can a leak detection survey actually go ahead if one side won't cooperate?

Dave

It's a situation we come across a lot, and the honest answer is: it depends on where the leak is and which areas we need access to. A survey can sometimes produce partial results, but a full, conclusive survey almost always needs both parties to open their doors.

George

Why does it need both? Can't you just work from whichever side lets you in?

Dave

Water takes the path of least resistance, so where it shows up and where it's actually escaping from are often two completely different places. If the leak source is above a ceiling in a flat below, ADI's engineers need access to the flat above to trace the supply pipework or waste runs properly. Working from one side only, you're likely to end up with an inconclusive result.

George

So what actually happens on the day if, say, the freeholder agrees but the leaseholder above won't open their door?

Dave

Our engineer will still attend, assess what's accessible, and carry out whatever tests the available access permits. Acoustic listening equipment can pick up pipe noise through floors and walls to a degree, so it's not a wasted visit. But without getting into the property above, our engineer can't apply tracer gas to the supply pipework up there, and can't pressure-test those runs to isolate a pinhole or a joint failure.

George

Let's talk about those methods. How does acoustic listening help, and what are its limits when access is restricted?

Dave

Acoustic listening devices detect the sound signature that escaping water creates under pressure. Our engineers place sensors on floors, walls and pipework to pick up that signal and follow it toward its source. It's a genuinely useful method, but structure-borne sound travels in unpredictable ways, so the result needs to be confirmed by getting closer to the suspect area. If that area is behind a locked door, acoustic work alone won't give you a definitive location.

George

And tracer gas? I've heard that mentioned for leaks under floors.

Dave

Tracer gas is injected into the pipework, and it escapes through the breach and rises to the surface, where a detector picks it up above ground. It's particularly effective under solid floors or buried pipework where you can't hear anything useful with acoustic equipment. The problem in a restricted-access scenario is that you need to introduce the gas into the pipe from a connection point, and that connection point is often inside the property whose owner won't cooperate.

George

This sounds like it can get complicated quite quickly from a legal or property management angle. Is there anything the person in this situation can do to actually move things forward?

Dave

The most practical step is to get the managing agent or the freeholder's solicitor involved early, because leases almost always contain access clauses that require leaseholders to permit inspection where a water leak is suspected. Those clauses exist precisely because a leak in a divided property affects everyone. A letter from a solicitor pointing to that clause often unlocks cooperation where a friendly request didn't.

George

And from ADI's side, is there anything you can do to help document the situation while access is being sorted?

Dave

Our engineers can produce a written report from whatever inspection is possible on the day, recording the symptoms observed, the tests completed, and a clear statement of which access points are needed to conclude the survey. That report is useful evidence for a managing agent, an insurance claim, or a legal process. It shows the work was attempted in good faith and identifies exactly what's blocking a resolution.

George

So the takeaway for anyone in this position is: a partial survey is possible, but a conclusive one almost always needs doors open on both sides.

Dave

That's exactly it. Water leak detection in a divided property is a joint exercise whether the parties like it or not. The leak doesn't respect tenure boundaries, and neither does the pipework. Getting both sides to cooperate isn't a bureaucratic nicety; it's what makes the survey work.

George

Really useful, Dave, thank you. If you're dealing with a suspected hidden water leak in a flat or divided property, ADI Leak Detection brings together the specialist expertise and the methods to trace it properly, once the doors are open. We'll be back with another question soon.

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.