Table of Contents
The short answer
A hidden leak announces itself in four ways: a water bill that rises for no reason, a meter that keeps turning when every tap is off, damp that appears where there is no tap (a stain on a ceiling, paint that blisters, a skirting board that swells), and the sound of water running in a quiet home. Any one of them is worth ten minutes of checking, because a leak inside a wall or under a floor does not stay the size it is.
Start with the meter test described below. It costs nothing and tells you whether water is escaping from the pressurised pipes. If it shows a leak, the likeliest sources are not inside walls at all: a toilet cistern that runs on, a flexible hose under a basin, a valve that weeps. If the meter is still and the damp remains, the water is coming from the waste side, from failed sealing around a shower, from the air conditioning or from a neighbour.
Finding the exact point is the plumber's part. In the trade it is done by elimination first and instruments second: closing valves section by section, pressure testing and, where needed, listening devices, thermal cameras or tracer gas. IHR Dream Cleaning's plumbing service in Abu Dhabi covers leak diagnosis and repair and pipe inspection, and our plumber traces the source before opening anything up. Which method a particular leak needs is confirmed after the inspection, not before it.
The signs, from the bill to the garden
On the bill
A leak on the supply side runs every hour of the day, so even a thin trickle adds up over a billing month. Compare the consumption figure on the bill, not the amount charged, with the same months of last year, since summer use is naturally higher. A jump you cannot explain by guests, a refilled pool or a new garden is the earliest sign you will get, often weeks before anything is visible.
What you can see
Water travels before it shows, so the mark is often some distance from the source. These are the usual marks.
- A ceiling stain with a brown edge, often in rings where it has dried and been wetted again.
- Paint that bubbles, flakes or feels soft, or a white powdery bloom where salts have been carried to the surface of a wall.
- Skirting boards, door frames or the base of a wardrobe that have swollen or come away.
- Laminate or wood flooring that cups, lifts at the joints or feels spongy.
- Floor tiles that have come loose or sound hollow, and grout lines that stay dark.
- Mould low on a wall, especially on the far side of a bathroom or kitchen wall.
- The floor of an under-sink cabinet that is stained, swollen or smells of damp.
What you can hear, feel and smell
In a quiet home at night, listen near the bathrooms and the kitchen. A faint hiss, or the sound of water running with every tap closed, is a pressurised leak. A toilet cistern that refills by itself every so often is losing water into the bowl. In a villa with a pressure pump, a pump that starts when nobody has opened a tap is replacing pressure that is escaping somewhere.
A patch of floor that is warm underfoot can mean a hot-water pipe is leaking beneath it. A musty smell in a cupboard, or in a room that will not air out, means something has been damp for a while.
Outside a villa
Look for a strip of garden that stays green or wet when the rest is dry, paving that has sunk or grows algae, water marks on a boundary wall, a roof-tank overflow pipe that drips, and the sound of a tank filling when nobody has used water. Irrigation lines, garden taps, tank float valves and the pipe run from the meter to the house are all out of sight, and villas have more of them than apartments do.
The meter test: ten minutes of your own time
The water meter measures everything that enters your pipes. If it moves when nothing is in use, water is leaving the system somewhere. In an apartment the meter is usually in a service cupboard on your corridor, and you may need building management or security to open it. In a villa it is normally in a box at the boundary, near the gate.
- Pick a time when nobody will need water for an hour or two. Turn off every tap, the washing machine, the dishwasher, the ice maker and any irrigation timer, and ask the household not to flush.
- In a villa with a storage tank, wait until the tank has finished refilling after the last use, or the meter will be turning for an innocent reason.
- Photograph the meter so that all the digits and the small dials are readable. Many meters have a low-flow indicator, a tiny wheel or star that spins with even a trickle.
- Watch the indicator for two minutes. If it turns, water is flowing now.
- If it is still, leave everything off for an hour or two, or overnight, and photograph the meter again. Any change in the reading is water that went somewhere.
- If the meter moved, narrow it down. Close the small valve behind each toilet and repeat. Close the valve feeding the water heater and repeat. In a villa, close the main valve where the supply enters the house: if the meter still moves, the leak is between the meter and the house or in the garden; if it stops, the leak is indoors.
What the test cannot show
The meter only sees the pressurised supply. It says nothing about water that has already been used: a leaking waste pipe under a bath, a shower tray whose sealant has failed, a cracked floor trap or tired waterproofing under a wet-room floor. Those leaks happen only while the fixture is in use and never move the meter. Nor does it see a blocked AC drain, rain getting in, or water arriving from the flat above. A still meter with a growing damp patch is useful information: it rules out the supply pipes and points to one of these. Tell us the result of the test when you book, whichever way it went. It shortens the diagnosis.
In a villa where a tank and a pump feed the house, the meter measures water going into the tank, not out of it. A leak after the pump shows up as the pump running by itself and the tank refilling more often, so watch those two instead.
The toilet test
A cistern that leaks into the bowl is silent and invisible, and it is a frequent reason for a bill that climbs. Put a few drops of food colouring into the cistern, do not flush, and look at the bowl after twenty minutes. Colour in the bowl means the cistern is passing water. It is a small repair, usually a worn flush valve or fill valve that is replaced to stop the waste.
Where hidden leaks usually turn out to be
Most leaks that people call hidden are in places that can be reached without breaking anything. They are hidden only because nobody looks there. Check these before you assume the worst.
| Where the damage shows | Often turns out to be | Quick check |
|---|---|---|
| Under-sink cabinet floor | Flexible hose, valve or waste joint | Dry tissue around each joint |
| Bathroom or corridor ceiling | Water heater or pipes above the false ceiling | Is the stain under the heater? |
| Ceiling near an AC vent | Blocked AC condensate drain | Is it worse when the AC runs hard? |
| Wall beside a shower | Failed silicone or grout, or the mixer body | Is it damp only after showers? |
| Floor around a toilet | Cistern connection or the pan seal | Dye test; feel the supply hose |
| Beside the washing machine | Inlet hose or waste hose | Run a cycle and watch |
| A neighbour's ceiling below | Shower or bath waste, floor waterproofing | Does it follow your bathroom use? |
Hoses, valves and cisterns
The braided flexible hoses that connect basin taps, toilet cisterns and bidet sprays have a rubber tube inside a steel braid. The rubber ages and the braid rusts in a damp bathroom, and when one fails it can go from a weep to a spray. The small angle valves they screw onto can weep at the spindle. Look for rust spots on the braid, a bulge, a green or white crust at a joint, or a drip mark on the wall below. A yearly look at mixers, hoses and under-sink joints catches slow leaks before they damage cabinets.
Water heaters above the ceiling
In many apartments the water heater sits above the false ceiling of a bathroom or corridor. A corroded tank, a weeping connection or a relief valve that drips all show up as a stain directly below. Because electricity and water are together up there, do not open the ceiling to look. Switch the heater off at its wall switch and call. Whether a leaking heater is worth repairing is the subject of water heater not heating or leaking.
Showers, baths and sealant
Many damp walls beside bathrooms have no leaking pipe behind them. Water gets through cracked grout or failed silicone at the edge of the shower tray or bath every time someone showers, soaks the wall and appears in the next room. The clue is timing: the patch grows after showers and dries a little when the bathroom is unused for a few days. The repair is to renew the joints, which is the work of our grout and silicone repair service, and it is far less disruptive than pipework.
Air conditioning and condensation
In the humid months an AC unit takes a great deal of water out of the air, and it leaves through a small drain line. When that line blocks, the tray overflows onto the ceiling. Stains beside a vent or under an indoor unit that worsen in summer are usually this, and the fix belongs to AC servicing, not plumbing. Poorly insulated cold pipes and ducts above a ceiling can also sweat enough in humid weather to mark it.
Supply, waste or something else: narrowing it down
Draw a light pencil line around the edge of the stain and write the date beside it. Photograph it. Two days later you will know whether it is growing, how fast, and after what. That record is also what a landlord, a building manager or an insurer will ask for. Three observations then sort most leaks into the right group before anyone arrives.
- The damp grows while the home is empty: it is fed by pressure, so suspect a supply pipe, a hose or the heater.
- It grows only after a shower, a bath or a wash cycle: it is waste water, or failed sealing around that fixture.
- It follows the weather or the AC: after rain, look at the roof, the terrace and the balcony outlets; in humid weeks with the AC working hard, look at the condensate drain.
How a plumber finds a leak
What follows is how leak tracing is generally done in the trade, from the least disruptive method to the most. It is not a list of equipment that every plumber carries, and IHR does not publish a list of instruments. What our service page does commit to is the principle: the plumber checks the fixture, the pipe run or the fault source directly instead of assuming that the first visible symptom is the cause, and traces the source before opening anything, to limit disruption to tiling and cabinetry.
- Questions and a visual survey. When it started, what makes it worse, what the meter did. Then every exposed joint, hose, valve, cistern and heater connection is looked at and felt. Many leaks are found at this stage.
- Isolation. Valves are closed one section at a time, hot side and cold side, bathroom by bathroom, while the meter or a pressure gauge is watched. The section that stops the loss when it is closed contains the leak.
- Pressure testing. A gauge is fitted, the section is shut off under pressure and the needle is watched. A steady fall confirms a leak in that section even when nothing can be seen.
- Moisture mapping. A moisture meter reads how wet a wall or floor is at many points. Water travels along pipes, slabs and screed, so the wettest point is a guide, not proof.
- Thermal imaging. A thermal camera shows surface temperature. A hot-water leak under a floor appears as a warm bloom, and a damp patch cooled by evaporation appears cold. It does not see through walls; it shows where to look.
- Acoustic listening. Water escaping from a pressurised pipe makes a noise that a sensitive ground microphone can pick up through concrete. It works best in a quiet building.
- Tracer gas. For leaks that make no sound, the pipe is emptied and filled with a safe, light gas mixture that escapes at the leak and is found at the surface with a detector.
- Dye and flood tests. For waste-side leaks, coloured water is run through one fixture at a time, or a shower floor is plugged, flooded to a marked level and watched.
- A small opening at the confirmed point. Only when the position is established is a tile lifted or a panel cut, and sometimes a short inspection camera goes in first.
What we confirm before any work
Tell us what you have observed when you book, and we will tell you plainly what the visit can do. A leak at a fixture, a hose, a valve, a heater connection or an accessible pipe is everyday plumbing. If the signs point to a leak deep in a slab, or to one that needs a specialist survey with detection equipment, describe it when you book so that the scope can be confirmed first. Where a job is outside our scope, we say so before a visit is arranged.
After the on-site diagnosis, parts and labour are confirmed before any repair proceeds. Our service page notes that a pipe inspection for a suspected hidden leak can take longer than an ordinary repair, depending on how much of the system has to be checked.
What to do until the plumber arrives
A slow leak gives you time to limit the damage. Use it.
- Close the valve to the suspect fixture if you have found one. If the meter is running fast and you cannot find the source, close the main valve whenever you do not need water. Where the valves usually are, and what to do with an active leak, is in the first ten minutes of a leak or burst pipe.
- Keep electricity away from the damp. Do not use a socket or switch on a wet wall. If a ceiling light is in a stained area, switch that circuit off at the distribution board, provided the board is dry and you can reach it safely.
- Move furniture, rugs and anything stored against the damp wall or under the stain.
- Keep the room aired and the AC running to help it dry.
- Do not paint over a stain, fill a crack or run silicone along a damp joint to hide it. It delays the diagnosis and traps the water.
- Do not open a wall, a floor or a false ceiling yourself. Pipes and cables share those spaces.
Who to tell, and who is responsible
In an apartment, tell building management early, even if you think the leak is yours. Water moves between flats through slabs and shafts, the source may be above you, and the risers and shared pipes are the building's to deal with. Management can check the common pipework, arrange access to a neighbour's flat and warn the flat below. Where plumbing work touches shared pipes, the building may need to approve it or isolate the supply first.
If you rent, tell the landlord or the agent in writing, with dated photos, before any repair. Whether a repair falls to the tenant, the landlord or the building depends on the tenancy contract, on the building's rules and on where the leak turns out to be. We cannot tell you that as a rule, because it is not one. It is also why we ask at booking whether the home is rented: some repairs need the landlord's confirmation first.
If the leak has inflated a bill, ask your water supplier what it needs from you; its procedures are its own and we do not restate them here. If you have home insurance, read what the policy asks for before the repair is done, since a dated record and the failed part are easier to keep than to recreate.
After the leak is fixed: drying comes before decorating
A repaired pipe does not dry the wall. Plaster, screed and gypsum board hold water for a long time, and paint or filler applied over damp material blisters again within weeks. The order is: stop the leak, let the structure dry, repair the gypsum or plaster, then prime and paint. Our own ceiling repairs start from the same point: on a water-damaged patch the source of the leak has to be dealt with, not only the ceiling.
The full sequence, with what can and cannot be saved, is in water stain on the ceiling or peeling paint: what to fix first. The ceiling itself comes under gypsum and false ceiling work.
What a visit from IHR involves
Our plumbing visits follow the same five steps whether the leak is obvious or not.
- Describe the issue when you book: what you have seen and the result of the meter test. Reply to the confirmation email with photos or a short video.
- Urgent leaks are given priority and can often be scheduled the same day. A slow, contained leak is booked for a time that suits you.
- On site, the plumber diagnoses the fault at its source.
- Parts and labour are confirmed with you once the fault is identified, before the repair proceeds. Any replacement part is shown and priced before it is fitted.
- The repair is completed and checked for leaks and correct pressure. The plumber runs the water with you, checks the joints for drips and shows you any worn part that was replaced.
How it is priced
A plumbing visit starts from AED 99: one plumber and the first hour on site. There is no fixed price beyond that, because replacing a washer and repairing a pipe behind tiles are different jobs. Parts and longer work are quoted by task, from your description and photos or after a free inspection, and agreed before the work begins. Payment is online by card, from My bookings on this website once the price is confirmed, and every quote includes VAT. If the same fault returns within a short period, tell us, so that it is looked at again and not treated as a new job.
Common questions
Will the plumber have to break tiles?
Often not. Leaks at hoses, valves, cisterns, heaters and under-sink joints need no opening at all. When the leak is inside a wall or a floor, the aim is one small opening at the confirmed point, not a trench along the pipe. Sometimes the less disruptive repair is to take a failed buried section out of use and run a new pipe by another route. That is decided with you once the fault is found, and with the landlord in a rented home.
How long can I leave a slow leak?
Not long. Water that is out of sight is still working. It swells chipboard and door frames, lifts flooring, rusts fittings, feeds mould and, in an apartment, eventually reaches the neighbour's ceiling. It also gets near wiring. A leak that is a small repair this week can become a repair to a cabinet, a floor and a ceiling next month.
The water is coming from the flat above. What do I do?
Tell building security or management at once and ask them to contact the flat above; you cannot isolate someone else's supply. Photograph the ceiling and move what is beneath it. If water is near a light fitting, switch that circuit off at the board if you can do so safely, and keep out from under a ceiling that is sagging.
Does IHR do leak detection with equipment?
Our plumbing service covers leak diagnosis and repair and pipe inspection, and the plumber traces the source before anything is opened. We do not publish a list of detection instruments, and we would rather confirm the method after seeing the problem than promise one in advance. If you have been told you need a specialist survey, for example for a leak under a slab, say so when you book and we will confirm whether it is work we take on before anything is arranged.
How long does a visit take?
Our service page gives 30 to 60 minutes on site for a single tap or fitting repair and 45 to 90 minutes for fitting a new fixture. Tracing a suspected hidden leak can take longer, depending on how much of the system needs checking, and a repair inside a wall adds the time to open it and make good.
How to book
Book on the website or in the IHR Dream app and describe what you have found, then reply to the confirmation email with your photos. We work every day from 8 AM – 8 PM. For an active leak, phone +971 52 723 5299 so that the request is seen at once.
The plumbing service page lists what is covered, and the maintenance and repairs page shows the related trades. When you are ready, book a visit.
