What does water leak detection involve?
Water leak detection is the process of tracing a leak you can't see back to the pipe or fitting it's coming from. We start with the basics: checking whether the leak is on your mains supply, your heating system or your waste pipes, as each points to a different part of the house. We then narrow the search down using the signs in the property, such as where damp appears, how quickly it spreads and whether it gets worse when certain taps or appliances are used. The aim is to find the leak before opening anything up, so we only lift the floorboard or remove the tile that needs to come up.
Signs you have a hidden water leak
The most common signs of a hidden leak are damp patches or stains on walls, ceilings or floors with no obvious cause. Others include a water bill that's higher than usual, the sound of running water when everything is off, mould or a musty smell in one area, loose or lifting floor tiles, warm spots on a floor, and a combi boiler or heating system that keeps losing pressure. If you're on a water meter, you can turn off every tap and appliance and check whether the meter is still moving. If it is, water is escaping somewhere.
What causes hidden leaks?
Hidden leaks usually come from joints and fittings rather than the middle of a pipe. Compression joints can loosen over time. Pipes laid in concrete floors can be damaged by movement or corrosion. Shower trays and baths can leak at the seals, letting water seep into the floor or the ceiling below. Heating pipes under floors are a common source of pressure loss. The mains supply pipe between your boundary and the house can also leak underground, often without any visible sign inside.
Why you shouldn't ignore a slow leak
A slow leak causes more damage than most people expect, because it goes unnoticed for longer. Water soaking into timber floors, joists and plaster can lead to rot, mould and stained ceilings, and in the worst cases a ceiling can come down. Leaks on a metered supply push up your water bill. A leak on your heating system makes the boiler work harder and lose pressure. Finding and fixing it early is almost always cheaper than repairing the damage later, and it keeps your home dry and healthy.
What affects the cost of leak detection?
The cost of finding a hidden leak depends on how easy the pipework is to reach and how many possible sources there are. A leak that can be traced to a fitting under a bath is quicker to find than one under a solid floor or a long run of buried supply pipe. The size of the property, the type of heating system and whether more than one leak is present all affect the time needed. Repair costs are separate and depend on what we find.
Our standard hourly call-out rates, excluding parts, materials and VAT, are:
Monday to Friday, 8am to 5pm£100 / hour
Monday to Friday, after 5pm£150 / hour
Saturday and Sunday, 8am to 5pm£150 / hour
Saturday and Sunday, after 5pm£180 / hour
Emergency callouts may vary, so ask us for details. There are no hidden charges, and we always confirm a fixed price for your job before we start.
Can a hidden leak be repaired without major damage?
In most cases, yes. Once the source has been pinned down, the repair usually only means opening up a small area, such as lifting a few floorboards or removing a single panel. The more accurately the leak is located, the less of your home needs to be disturbed. Where a leak is under a solid floor or in a long buried pipe, rerouting the pipework can sometimes be less disruptive than digging it out. We'll explain the options so you can choose the one that suits you.
Water leak detection FAQs
How do I check if I have a water leak?
The simplest check, if you have a water meter, is to turn off every tap and water-using appliance and look at the meter. If the dial is still moving after a few minutes, water is escaping somewhere. Without a meter, look for damp patches, listen for running water when everything is off, and watch whether your boiler keeps losing pressure.
Who pays for a leak on the pipe outside my house?
Responsibility for a leak on the water supply pipe depends on whether the leak is inside or outside your property boundary. Contact your water supplier first: they can confirm who is responsible for the section that's leaking and tell you whether they offer any help with repairs.
Will home insurance cover finding a hidden leak?
Some home insurance policies include "trace and access" cover, which pays towards finding a leak and opening up the area to reach it. Whether you have it depends on your policy, so check before booking. We give you a written invoice and report of what we found to support your claim.