Water coming through a ceiling
Arrange entry to the affected flat and the home above. The wet patch may be away from the source.
When another flat is involvedFlat leak detection in Greater London.
ADI investigates hidden water leaks in flats across Greater London, including leaks affecting more than one home. Explain where water appears and arrange access with the occupiers and building manager before the visit.
- Office open Monday to Friday, 7:30am to 6:30pm
- Coverage across Greater London, as part of England, Scotland and Wales
Areas we cover in Greater London.
Greater London place examples
- Croydon
- Bromley
- Enfield
- Harrow
- Hayes
- Romford
- Richmond
- Sutton
Map of Greater London
Checking ceiling stains below another flat
In a London house converted into flats, bedroom-ceiling stains lay beneath the kitchen and utility cupboard of the flat above. Moisture and thermal checks did not reveal the cause, but visual inspection found a dripping heating connection at the hot-water cylinder. The engineer tightened the connection and the observed drip stopped.
Separate tests of the incoming cold supply, hot-water pipework, gravity-fed cold supply and heating held pressure during the visit. Other watermarks at a roof-and-wall junction in the utility cupboard still needed attention. The report does not establish that tightening the connection explained every stain, repaired the roof or restored the finishes.
Local coverage notes
This page follows the ceremonial county of Greater London: the 32 London boroughs, including Westminster, but excluding the separate City of London.
Leaks we investigate in flats across Greater London.
You usually notice the signs before anyone knows the source. The investigation starts with what you have seen and works back to the pipe.
A leak reaching the flat below
Record what your neighbour sees and agree access through the relevant occupiers or building manager.
Arranging accessDamp near a bathroom, kitchen or boiler
Note which fitting was used before damp appeared, and share any earlier repairs to the surrounding pipework.
How the methods helpHeating pressure that will not hold
Provide the pressure history and any boiler checks. Pressure loss alone does not identify a concealed leak.
Read a heating leak case study
Leak detection equipment used in Greater London flats.
Not every method suits every leak. The engineer picks a combination based on the pipework, the building and what can be reached.
- Moisture meters
- Compare readings across a ceiling, wall or floor to see how far water has spread. On the investigation above they did not reveal the cause on their own.
- Thermal imaging
- Shows surface temperature patterns that can help trace heating and hot-water pipes. Here it did not settle where the water came from; the dripping connection at the cylinder was found by eye.
- Inspection cameras
- Give a view into voids, boxing and the space behind fitted units through a small opening, without taking a surface apart.
- Pressure testing each supply separately
- The incoming cold, the hot-water pipework, the gravity-fed cold and the heating were tested separately here, and each held pressure during the visit.
Leak detection reviews for ADI on Trustpilot.
Read all ADI’s reviews on TrustpilotSelected excerpts from five-star reviews of ADI’s wider service across the UK.
Read Andrew W’s full review on TrustpilotJames provided an excellent service. Arrived very promptly and was quick to locate the leak on our front driveway.
Read Alison White’s full review on TrustpilotI like the follow up report and photographs.. helpful with insurance!
Greater London flat leak questions.
Answers for flat owners, landlords and residents in Greater London. For anything specific to your building, the team can talk it through on the phone.
Which parts of Greater London does this page cover?
This page follows the ceremonial county of Greater London: the 32 London boroughs, including Westminster, but excluding the separate City of London. The places listed are examples within Greater London, not a complete list or a record of past jobs. Call with the full postcode to discuss the property and current availability.
Who should I contact first about water coming through from the flat above?
Tell the occupier above and whoever manages your building, such as a landlord, letting agent or managing agent. If you rent, report it to your landlord straight away. Note when and where the water appears. Read the guide to leaks between flats.
Where can I check the water hardness for the property?
Check the actual drinking-water supplier’s information for your postcode. Hardness varies locally, and a hardness result does not establish why a pipe is leaking. Describe the symptoms and any earlier investigations when arranging a survey.
Can the investigation cover the flat below or next door as well?
Access may be needed to another flat or communal pipework. Agree this with each occupier and the building manager before the visit; do not promise access on someone else’s behalf.
How do I arrange a survey for my London flat?
Call us to discuss your property and arrange a survey. The team will ask about the symptoms you have noticed and confirm engineer availability for your borough. This website does not offer online booking.
Talk to ADI about leak detection for your flat.
Your enquiry goes directly to ADI Leak Detection. Tell the team what you have noticed, your postcode and which flats may need access. They can discuss the right investigation, a quote and availability.
Call ADI: 0333 567 2618Office contact hours
Monday–Friday, 7:30am–6:30pm
Saturday and Sunday closed
UK local time. Office hours are not engineer attendance times. Please check bank-holiday availability.
Correspondence office
Suite 407, Access Business Center, Handy Cross Roundabout, High Wycombe HP11 1UP