Greater London · London and the South East
Electronic Leak Detection in Force Green
Electronic leak detection to pinpoint holes in flat roof membranes in Force Green, carried out by an experienced roof surveyor. You get a clear written report with photographs.
- Leaks at pipes, outlets or fixings
- Leaking laps in the waterproofing
- Stains far from any visible defect
What a survey costs
When we price a survey, we consider:
- House, block, shop or office
- How many separate roofs there are, such as extensions, dormers and garages
- The height of the building and how the roof can be seen safely
- The shape of the roof and its details
The cost of a survey depends on the roof: how big it is, how high it is, the number of separate roofs and how safely it can be seen. Electronic leak detection is quoted for your roof, because the method depends on the roof.
What to tell us when you get in touch
When you call or email, these details help:
- Pictures of the roof from a safe spot, if you have them
- Your timetable, like an exchange date
- Where any leaks, stains or damp patches show inside
- Your postcode, so we can check access and travel
To book a survey, ring 07833 053749 or send us an email and tell us the address and what’s prompted the survey. We will confirm the price before you book.
Electronic leak detection for homes and businesses in Force Green
Electronic leak detection works on many flat roof membranes over offices, units, blocks of flats and homes. It can be used to trace an existing leak or check a new membrane before handover. We quote for each roof based on its size and build-up. Testing can be carried out on weekdays, Saturdays or Sundays, depending on the weather. Just ask about your roof. We survey flat roof membranes, liquid-applied waterproofing and commercial flat roofs, and people most often book us about leaks that return after repairs and stains far from any visible defect.
Water getting through a flat roof in London can travel under the covering and appear some way from the hole. Upstands against parapets, outlets and the edge where flat meets pitched are common entry points. In a converted house in Force Green, the roof above may belong to the building rather than one flat.
After the visit, you get a written report with photos, emailed to you. It explains the condition of the flat roof membrane, the defects we found and what we recommend.
- Place
- Force Green (TN16)
- Wider area
- Greater London
- Prices
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- Appointments
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Page updated
- 27 October 2026
What happens if roof problems are left?
Leaks left running can wet the insulation and deck. Finding the breach sooner limits that. In a London terrace or conversion, a roof defect rarely stays your problem alone: a blocked parapet gutter or slipped slate can let water into the flat below or the house next door. Dealing with it early is far less disruptive.
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. You’ll know the figure before booking.
Why book us in Force Green
- Drone and thermal imaging surveys available
- More than 5,000 surveys completed
- Covered by professional indemnity and public liability insurance
- An independent view of the roof
Force Green questions
Is parking a problem for a survey in Force Green?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Do you carry out roof surveys in Force Green?
We do. The survey and report are the same in Force Green as anywhere else, and visits run on weekdays and weekends.
Do you look in the loft space?
Usually, if there’s one and it can be reached safely. From inside, the underside of the roof often shows damp, staining or daylight that can’t be seen from outside.
What does electronic leak detection do?
The waterproofing membrane normally stops an electrical current, so wherever there is a hole, it passes through. That lets us find breaches that are too small to see.
Will you repair the leak?
No. We test the membrane and report. The report shows where each breach is for your roofer to repair.
Do I need to be at home?
It depends on what we need to see. Inside the building and in the loft, we need someone to let us in, while outside access can be discussed when booking.
How many surveys have you done?
We have more than 20 years’ experience and have carried out more than 5,000 surveys across London and South East England.
What we look for on each type of roof
Bituminous membranes
ELD is often possible on bituminous membranes, depending on what’s below.
Inverted and paved roofs
Inverted roofs have the insulation on top of the waterproofing, which affects testing.
What electronic leak detection looks like in Force Green
With Quebec House about 0.8 miles south, Force Green sits in an area with a long building history. Older homes in the wider area often have features worth a closer look, like lead valleys, tall stacks and roofs that have been patched over the years, and a listed home or one in a conservation area may need consent for changes of material. In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere.
For landlords with property near Oxted station, a flat roof over a rented flat is easy to forget until the tenant reports a leak. As a London address, Force Green can be tricky for parking: tell us about permits, visitor bays or off-street space when booking, as a space near the door cannot be promised.
Force Green is about 5 miles west of Sevenoaks, in Greater London. If you’re in Force Green, booking works exactly as it does anywhere else: a call or an email, a price, then a date. Across Greater London, we cover Force Green and the places around it. Crawley is in our area too.
Electronic leak detection in TN16 work the same way as everywhere else we cover. Other places close to Force Green include Westerham (1 mile south), South Street (2 miles north-west), Moorhouse Bank (2 miles south-west), Tatsfield (2 miles north-west) and Titsey (2 miles west). Further out, we also cover Orpington (7 miles north), New Cross (14 miles north), Thornton Heath (12 miles north-west), Croydon (10 miles north-west), East Dulwich (14 miles north-west) and Plumstead (14 miles north).
Near you in Force Green
We work in homes and buildings around The Olde House At Home Public House and the streets around them. For rail, the closest station is Oxted station, roughly 3.8 miles south-west of the centre. A little further out are Tandridge Priory (2.7 miles south-west). Not far away are Dryhill Nature Reserve and Betsom's Hill.
Signs you need electronic leak detection in Force Green
Roofs covered with paving, ballast or planting hide the membrane. Electronic methods can help on some of these roofs though it depends on the layers.
These are some of the problems a survey can pick up:
- Gaps at membrane joints
- A flat roof leak that can’t be traced
- New membranes needing a check before handover
- Repairs that haven’t stopped the leak
Take an older house close to Church of St Mary the Virgin: any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof.
Before you book any roof surveyor
- How long they’ve been surveying roofs
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
- Whether VAT is in the quoted price
- Whether the loft is part of the inspection
Tips from our surveys
Here are a few things we’d tell any owner, before and after a survey:
- Clear flat roof outlets regularly
- Stay off the flat roof unless needed
- Act on new leaks promptly
- Find the breach before more patching
After your roofer repairs the breaches, a retest can confirm them if the build-up allows.
Clear flat roof outlets regularly. Standing water puts more pressure on any weak point.
Towns and villages near Force Green
Also in Force Green
How it works
There isn’t much for you to do on the day. Point out anything you’ve noticed, like stains, drips or loose pieces, and we will get on with the inspection. The survey itself takes a time that depends on the roof’s area and construction, and we’ll give you a guide when quoting. For a visit in Force Green, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor the property is on and how to get into the loft. On the day, the roof is looked at from ground level, from windows, from inside the roof space and from the roof where it is safe.
- We agree the area to be tested.
- The surface is prepared for the chosen method.
- We work across the roof with the test equipment.
- We mark the breach locations in our records.
- The report is sent for your roofer to act on.
Getting ready for the survey
- Leave side gates unlocked
- Point out any leaks or damp patches
- If you are buying, let the agent know when we are coming
Book a survey
Our phone lines are open seven days a week, including Saturdays and Sundays. To book or ask a question, call 07833 053749 or drop us an email.