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School leak detection in Greater London: Plan the investigation around your school.

ADI investigates hidden water leaks at schools and colleges across Greater London’s 32 boroughs, with access and testing planned alongside the premises team.

Read the local investigation0333 567 2619

Investigated by ADI Leak Detection

ADI engineer using headphones and a ground microphone beside a water chamber
On site with ADI

Areas we cover in Greater London

Greater London (32 boroughs)

  • Croydon
  • Bromley
  • Enfield
  • Harrow
  • Hayes
  • Romford
  • Richmond
  • Sutton

Map of Greater London

When school heating checks could not confirm the leak location

Heating pipework visible inside an open external duct
External heating duct inspected during the London school visit. The leak location remained unconfirmed.

At a London school, the main-block heating system was losing water and its feed-and-expansion tank was running continuously. The engineer found no obvious above-ground water damage. Low heating temperature limited thermal imaging, while low pressure limited acoustic checks.

Air-pressure and tracer-gas testing were not permitted on this visit because of concerns about the aged pipework. The strongest acoustic indication was near a drainage inspection chamber, but the engineer could not confirm that the sound came from a leak. The location remained unconfirmed and no repair was carried out. Further pressure and tracer-gas testing appeared in the recommendations; those tests had not been performed.

School premises in Greater London

Greater London (32 boroughs)

Ceremonial Greater London comprises 32 London boroughs. The City of London is a separate administrative area and is excluded from this count. The 32 boroughs span inner and outer London, each with its own local authority running education services.

Open establishments on the DfE register
3,105
Primary phase
1,753
Secondary phase
459
Academies
913

Source: Department for Education, Get Information About Schools: all establishment data extract (opens in a new tab) ().

Where a survey often starts

  • Urban school sites where one meter feeds several buildings across a compact plot, so the first job is working out which branch is losing water.
  • Academy trusts with schools spread across different boroughs, where comparing meter readings across sites points to the one with the problem.
  • Older inner-London buildings on tight plots, where a leak under a hall or corridor floor shows up as damp or a rising bill long before any water appears.

Near the county boundary

School addresses do not always follow borough boundaries. Some schools in outer London boroughs carry postal towns from neighbouring counties such as Surrey, Essex or Hertfordshire. ADI covers all 32 boroughs, and the South East and East of England teams cover the surrounding counties.

WHAT WE SURVEY

Leak detection for school sites across Greater London.

A small primary in an outer borough and a large secondary in inner London can lose water in the same places: buried supply pipes, heating circuits, roofs, washrooms and kitchens. Start with the problem you are seeing.

All survey services

HOW WE INVESTIGATE

The detection methods
behind every survey.

All detection methods

EVERY KIND OF EDUCATION ESTATE

Schools, colleges and trusts
across Greater London.

Maintained schools, academies, free schools, special schools and independent schools all appear on the DfE register for Greater London. Find guidance written for your kind of setting.

Primary schoolsSecondary schoolsMulti-academy trustsIndependent and boarding schoolsFE collegesUniversitiesNurseries and early yearsSpecial schools and SEND

ADI LEAK DETECTION ON TRUSTPILOT

What ADI’s customers
say about the work.

See ADI Leak Detection’s reviews on Trustpilot

Selected excerpts from five-star reviews of ADI’s wider service across the UK.

Read all reviews on Trustpilot (opens in a new tab)

QUESTIONS

Coverage questions for Greater London

Do you cover all 32 London boroughs?

Yes. ADI covers all 32 boroughs of ceremonial Greater London. Call with the school's postcode and the team will confirm who covers it.

Our school is near a borough boundary. Is it still covered?

Yes. The towns on this page are examples to help you place the coverage. Schools near borough boundaries or with out-of-borough postal addresses are covered as well.

Can a leak survey happen during term time?

Often, yes. The detection methods are non-invasive, and the visit is planned with your site team around access, safeguarding and the school day. Some tests need part of the water supply isolated for a time, which is agreed with you first.

We are a trust with several schools across London. Can we discuss them together?

Yes. Call and describe the whole estate, including where each school is. The multi-site estates page explains how ADI approaches trusts with several schools.

Does ADI cover independent schools and colleges as well as state schools?

Yes. ADI surveys all types of education establishment, including independent schools, free schools, special schools and colleges, wherever they appear on the DfE register for Greater London.

LET’S GET TO THE SOURCE

Call about a leak at
a Greater London school.

Give the team your school's postcode and what you have noticed, and they will talk you through the next step.

0333 567 2619Speak to ADI’s office teamCompany and contact details ↗

Sources for this page

Last reviewed . How this site sources and dates its figures.

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