Greater London · London and the South East
West Dulwich Electronic Leak Detection
Electronic leak detection to pinpoint holes in flat roof membranes for West Dulwich, from an experienced roof surveyor. You get a clear written report with photographs.
- Damage from equipment installers
- New membranes needing a check before handover
- Failed seams and laps
How electronic leak detection works in West Dulwich
Electronic leak detection, or ELD, finds holes in flat roof waterproofing membranes. It works with an electrical current which can only get through the membrane at a breach. It can find holes too small to spot by eye so your roofer knows exactly where to repair. The results come in a report with photos. Common reasons to book are patched roofs that still leak and a flat roof leak that can’t be traced, on roof terraces and balconies, green roofs and single-ply roofs.
Commercial and residential blocks across London often have big flat roofs with plant, rooflights and access walkways. Every penetration and upstand is a place where a membrane can fail. In West Dulwich, roof access is agreed with the building manager or owner beforehand. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
The report is written in plain words, so it makes sense without any roofing background. Photos show what each point refers to, and recommendations are put by urgency where it matters.
- Place
- West Dulwich (SE21, SE27, SE19)
- Region
- Greater London
- Price
- Quoted for your roof
- Reports
- Emailed report with photos and recommendations
- Appointments
- Weekdays and weekends
- Insured
- PI and public liability insurance
- Phone
- 07833 053749
- Page updated
- 27 October 2026
Landlords, agents and block managers in West Dulwich
Letting agents can arrange access with tenants, at a time agreed in advance. We survey on any day of the week, which can make access easier.
With a portfolio of properties, surveys can be booked for more than one address. To discuss a number of properties, call 07833 053749 or email us with the addresses.
Also near West Dulwich
Other services in West Dulwich
Common questions in West Dulwich
Do you carry out roof surveys in West Dulwich?
Yes, West Dulwich is one of the places we work. The survey and report are the same in West Dulwich as anywhere else.
Can parking be tricky for a visit in West Dulwich?
Parking in West Dulwich, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
What is electronic leak detection?
A sound membrane blocks the test current, but a hole lets it through. That’s how we locate breaches you can’t see.
Is this an asbestos survey?
No. We don’t carry out asbestos surveys or testing. We flag materials that could contain asbestos, such as cement sheets or soffits on pre-2000 buildings.
What do I do with the report?
You receive the written report by email, with photographs and recommendations. You can use it to talk to a seller, an insurer, a roofer or a managing agent, whichever applies.
How long will testing take?
Testing typically takes a length of time set by the membrane area and the build-up, and we’ll give you a guide when quoting.
Does someone need to be in?
Not necessarily. If we only need the outside, we can agree that ahead of time, but the loft and any rooms with damp need someone to let us in.
Leave it or get it looked at?
Leaks left running can wet the insulation and deck. Finding the breach sooner limits that. In West Dulwich, as across London, an overflowing gutter soaks the wall below, which can lead to damp inside. A blocked outlet ignored for a winter or two can mean damp walls inside.
Bigger, taller and commercial roofs take more time to survey, so the price reflects that. You’ll know the figure before booking.
Why book us in West Dulwich
- Professional indemnity and public liability insurance
- We hold a CAA Flyer ID and Operator ID
- An independent view of the roof
- Surveys on weekdays, Saturdays and Sundays
Take a look at what a roof survey costs and our case studies.
What electronic leak detection looks like in West Dulwich
Many homes in inner London are Victorian and Edwardian terraces, frequently with Welsh slate roofs. A butterfly roof with a central valley gutter, tucked behind a parapet wall, is common on these houses. If your home in West Dulwich is one of them, lead flashings, party-wall upstands and shared chimney stacks are part of the picture too. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere. About 0.2 miles south lies Kingswood House, a reminder of how long the area around West Dulwich has been built on. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and a listed home or one in a conservation area may need consent for changes of material.
For site and facilities teams at buildings like Dulwich Wood Primary School, large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly. Controlled parking zones are common in London, so mention any permit rules for West Dulwich. Shop and office owners around Lewisham Shopping Centre may find that outlets and upstands on commercial flat roofs are the places to check before trouble starts.
West Dulwich is about 1 mile north-east of West Norwood, in Greater London. We cover West Dulwich and the rest of Greater London. Across Greater London, we cover West Dulwich.
Here we cover the SE21, SE27 and SE19 postcode area for electronic leak detection. We offer electronic leak detection to properties on Berry Lane, Clive Road and Myton Road and the roads around them. With the A2199 close by, West Dulwich is easy for us to reach. Close by, we survey roofs in Sydenham Hill (1 mile east), West Norwood (1 mile south-west), Gipsy Hill (1 mile south), Dulwich (1 mile north) and Upper Norwood (1 mile south). Within a short drive, we also cover London (5 miles north), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles north-west), St Pancras (7 miles north) and Shoreditch (6 miles north).
Local landmarks in West Dulwich
Locally, jobs take us to homes and businesses close to The Wood House, Dulwich Prep & Senior and Kingsdale Foundation School. There’s a railway station in West Dulwich itself: Sydenham Hill station. Other landmarks nearby include British Vintage Wireless And Television Museum (within half a mile west) and St Christopher's Hospice (1.3 miles south-east). Open spaces near West Dulwich include Battersea Park Lake and Dulwich Upper Wood.
Tips that help
Some practical points come up on survey after survey. They apply to most roofs:
- Test new membranes before covering them
- Get leaks traced quickly
- Avoid repeated repairs without finding the cause
- Record dates and spots where water appears
Keep the report with the roof’s records. It shows the condition of the membrane on that date.
Don’t leave a flat roof leak running. The longer water gets in, the more insulation and decking can be affected.
Should I look at the roof myself first?
A lot can be seen from ground level. Binoculars help you spot slipped slates or tiles, gaps along the ridge and a leaning stack. Please do not climb up for a closer look.
After heavy rain, check ceilings and the tops of walls for new stains. Photograph them and note the date, which helps when we look at the roof.
What a survey costs
When we price a survey, we consider:
- Chimneys, valleys, parapets and other details
- The roof’s overall size
- How many separate roofs there are, such as extensions, dormers and garages
- House, block, shop or office
The cost of a survey depends on the roof: its size, its height, how many sections it has and how safely it can be seen. Electronic leak detection is quoted for your roof, because the method depends on the roof.
Getting in touch
When you call or email, these details help:
- Your timetable, such as an exchange date
- What kind of property and roof it is
- Access details, such as a loft hatch or a shared roof
- Pictures from the garden or a window, if you have them
Our phone lines are open seven days a week. For a price or to book, phone 07833 053749 or email us.
How the survey works
Time on site depends on the size and shape of the roof, but as a rough guide the survey takes a length of time set by the membrane area and the build-up, which we set out in the quote. You are welcome to ask questions while we’re there. In West Dulwich, as in much of London, a good many properties are flats or terraces without side access, so the back of the roof is frequently seen from upstairs windows, from inside or, where a flight is allowed, from the air. Mention any building rules, key holders or managing agents as you book.
- You let us know about the roof and where water is showing.
- The roof is assessed for suitability first.
- The test method is chosen to suit the roof.
- The membrane is tested and breaches are found.
- A report with photos shows where each breach is.
Before we arrive
- If you are buying, let the agent know when we are coming
- Let us know about parking before the day
- Have keys ready for side gates, garages or roof access doors
Booking a survey
Buyers should book once an offer has been accepted, so there’s time to use the report before exchange. Otherwise, simply phone 07833 053749 or drop us an email whenever suits you.