Greater London · London and the South East
Electronic leak detection in Forest Hill, Greater London
Find out the condition of the flat roof membrane at your property in Forest Hill. Visits run on weekdays and weekends, in the daytime.
- Leaking laps in the waterproofing
- Patched roofs that still leak
- Leaks at pipes, outlets or fixings
Why get it checked now?
Not every leak is in the membrane. ELD helps rule the membrane in or out so attention can go to the right place. In a London terrace or conversion, a roof defect rarely stays your problem alone: failed flashings and blocked valley gutters can send water into more than one home. Dealing with it early is far less disruptive.
What a survey costs comes down to the roof itself: how big it is, how high it is, the number of separate roofs and how safely it can be seen. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Why book with us
- Every finding written up with photos
- Weekday and weekend surveys
- 5,000+ surveys completed
- More than 20 years surveying roofs
About our electronic leak detection in Forest Hill
Our ELD testing covers flat roofs in Forest Hill and the rest of London and the South East. A visit typically takes a length of time set by the membrane area and the build-up, which we set out in the quote. Every roof is quoted on its size and build-up. The results come in a written report with photos. If you’re worried about holes left by work on the roof and damp inside with no sign on the roof, we can find out what’s behind it, on roof terraces and balconies, liquid-applied waterproofing and green roofs alike.
Across London, flat roofs are everywhere, from back additions and dormers to roof terraces, blocks of flats and offices. They’re covered in felt, asphalt, EPDM rubber, GRP fibreglass or single-ply membranes, and each fails in its own way. Which one is on a roof in Forest Hill shapes how it is checked. Many older flat roofs are felt or asphalt, and many newer ones EPDM rubber or GRP.
The report does not just list problems. For each finding, it explains what it is, why it matters and what we’d recommend, so you can plan your next steps.
- Where
- Forest Hill (SE23, SE22, SE26)
- Wider area
- Greater London
- Prices
- Quoted for your roof
- Reports
- Emailed report with photos and recommendations
- Survey days
- Weekdays, Saturdays and Sundays
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Last updated
- 27 October 2026
Signs you need electronic leak detection in Forest Hill
Holes in a membrane often come from feet, tools or debris. Many are tiny but water still finds them.
These are some of the problems a survey can pick up:
- Repairs that haven’t stopped the leak
- Leaks at pipes, outlets or fixings
- Punctures from foot traffic or tools
- Leaking laps in the waterproofing
Controlled parking zones are common in London, so mention any permit rules for Forest Hill.
Questions to ask before booking
- Is there a chance to talk the report through?
- Whether you get a written report with photos
- Whether they hold professional indemnity and public liability insurance
- Is VAT included in the price?
How the survey changes by roof type
Bituminous membranes
Many flat roofs use bitumen-based membranes. Whether ELD suits them depends on the build-up.
Inverted and paved roofs
Inverted roofs have the insulation on top of the waterproofing and that changes how testing works.
Landlord and commercial surveys in Forest Hill
Surveys can also be booked by buyers’ agents acting for a client. Reports are emailed, so they’re easy to pass on.
Letting agents can arrange access with tenants, at a time agreed beforehand. We survey on any day of the week, which can make access easier.
What electronic leak detection looks like in Forest Hill
Close to the centre of London, a great many houses are Victorian or Edwardian terraces, many of them roofed in Welsh slate. From the street you may see only a parapet, with a butterfly roof and a valley gutter behind it draining to the back. In a house like that, shared stacks, party-wall upstands and lead flashings all need looking at as far as they can be seen. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere. The wider area around Forest Hill has a long history of building, with Kingswood House about 1.6 miles south-west. Older homes in the wider area frequently have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and any change of roofing material on a listed home needs checking with the council first.
For landlords with property near Honor Oak Park station, flat roofs on let property tend to be checked only when they fail, which is the costly way round. If your home is one of the older ones in the streets near Honor Oak Christian Fellowship Centre, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof.
Forest Hill is about 2 miles south-east of East Dulwich, in Greater London. We carry out electronic leak detection in Forest Hill for houses, flats, blocks and commercial buildings. Our area takes in places right across Greater London, from the larger towns to small villages.
Here we cover the SE23, SE22 and SE26 postcode area for electronic leak detection. Streets in the area include Ewart Road, London Road and Rojack Road, all of which we cover. We also cover the places around Forest Hill: Honor Oak (1 mile north), Perry Vale (1 mile south-east), Brockley (1 mile north-east), Crofton Park (1 mile north-east) and Dulwich (1 mile west). Within a short drive, we also cover London (4 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles north-west), St Pancras (6 miles north-west) and Shoreditch (6 miles north).
Landmarks near Forest Hill
Locally, jobs take us to homes and businesses close to Allenby Tutorial Trust, Capitol Cinema pub and Harris Girls' Academy East Dulwich and the streets around them. The nearest railway station is Honor Oak Park station, roughly 0.5 miles north-east of the centre. A little further out are Greenwich Castle (3.1 miles north-east) and Horniman Museum and Gardens (0.5 miles south-west). Green spaces nearby include One Tree Hill and Knight's Hill.
Nearby places to Forest Hill
Other services in Forest Hill
The survey, step by step
Safety comes first on every visit. We inspect what can be seen safely, and if part of the roof can’t be seen, the report says so. Most visits take a time that depends on the roof’s area and construction, which we’ll explain when we quote. From the street, a London terrace normally shows only its front slope or parapet, so a visit in Forest Hill moves between viewpoints: the pavement, upstairs windows, the loft and any safe spot at the back. If other people live in the building, tell us who can let us into the shared parts.
- We agree the area to be tested.
- We get the roof ready for testing.
- Testing runs across the agreed area.
- We mark the breach locations in our records.
- You receive the results to pass to your roofer.
Preparing for the visit
- Have any paperwork from past roof work to hand
- Keep pets out of the way during the survey
- If it isn’t your property yet, arrange access through the agent
Booking a survey
Our phone lines are open seven days a week, including Saturdays and Sundays. For a price or to book, ring 07833 053749 or use the contact form.
Read more
What a survey costs
Prices vary from roof to roof, and it comes down to:
- Extensions, dormers and garages with roofs of their own
- How tall the building is and how easy the roof is to see
- Commercial roofs and larger buildings
- How complicated the roof is, with its valleys, chimneys and parapets
Every price we give includes VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You’ll know the price for the job before you book.
What to tell us when you contact us
To price your survey accurately, we will ask about:
- Pictures from the garden or a window, if you have them
- Whether there’s a loft hatch, a shared roof or tricky access
- Where the property is, with the postcode
- The kind of building and roof involved
To book a survey, phone 07833 053749 or send us an email and tell us the address and what’s prompted the survey. You’ll know the price before anything is booked.
Questions from Forest Hill
Is parking a problem for a survey in Forest Hill?
London parking needs a little planning, so let us know about permits, bays or a driveway as you book. That way the visit can be planned around it.
Does a conservation area affect roof work in Forest Hill?
The council and Historic England’s list are the places to check. It is worth checking before planning roof work, as both can affect what’s allowed.
Can you tell me if my roof has asbestos?
No. Our report may flag materials that could contain asbestos, but only a specialist asbestos surveyor can confirm it. It may be present in buildings built or refurbished before 2000.
Which days do you carry out surveys?
We survey on any day from Monday to Sunday, during the day, which suits people who work during the week. Just say which days work for you.
What does the report include?
It works through the roof part by part, in writing and with photos. The most urgent items are made clear.
Can every flat roof be tested?
Not every roof is suitable. Some membranes conduct electricity, and some build-ups lack a suitable layer below. If your roof will not work, we will say so at the start.
Will you walk on the roof?
Not unless it is safe. Most of what we need can be seen from safe viewpoints, the loft and, where applicable, a drone, and the report notes anything we couldn’t see.