Greater London · London and the South East
Electronic Leak Detection in Northumberland Heath
Electronic leak detection to pinpoint holes in flat roof membranes in Northumberland Heath. We have completed more than 5,000 surveys across London and South East England.
- Damp inside with no sign on the roof
- Leaks through a flat roof with no obvious cause
- Gaps at membrane joints
Electronic leak detection in Northumberland Heath: what you get
Our ELD testing covers flat roofs in Northumberland Heath and the rest of London and South East England. A visit normally 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. We survey green roofs, single-ply roofs and roof terraces and balconies, and people most often book us about breaches around outlets and penetrations and new roofs to check before paving or planting.
Across London, flat roofs are everywhere, from back additions and dormers to roof terraces, blocks of flats and offices. Coverings range from felt and asphalt to EPDM rubber, GRP fibreglass and single-ply membranes, each with its own weak points. In Northumberland Heath, as anywhere in London, the right approach depends on what the roof is made of. Many older flat roofs are felt or asphalt, and many newer ones EPDM rubber or GRP.
The report is yours to share with whoever needs it: a seller or estate agent, an insurer, a roofer, a builder or a managing agent.
- Place
- Northumberland Heath (DA8, DA7)
- Region
- Greater London
- Price
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- Appointments
- Weekdays and weekends
- Cover
- PI and public liability insurance
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Tips that help
There is plenty you can do without going near the roof. What helps most:
- Limit access to the roof
- Note where leaks show inside and when
- Consider ELD before paving or planting goes on
- Avoid repeated repairs without finding the cause
File the report with your roof paperwork. It is a dated record of the membrane’s condition.
Act on leaks quickly. Water under a membrane can spread.
Can I check my roof myself?
Your own check is a good start, but it isn’t a survey. From ground level, valleys, flashings and the backs of chimneys are frequently out of sight, and those are details a survey looks at closely.
Keep a simple record: dates of leaks, photos from the ground and any work done on the roof. Send it with your enquiry and it will help the survey.
Signs you need electronic leak detection in Northumberland Heath
Flat roof membranes can be punctured by foot traffic, dropped tools or debris. Many are tiny but water still finds them.
Problems we come across often include:
- Gaps at membrane joints
- Waterproofing to test before it’s covered
- Leaks showing away from the breach
- Leaks at pipes, outlets or fixings
If you let a flat or house near Barnehurst station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
What to check before booking
- Whether you get a written report with photos
- What experience they bring
- Whether VAT is in the quoted price
- Their report turnaround times
What we do, step by step
When we arrive, we start by asking what you’ve noticed and what you want to find out. After that, we check everything we can see safely, from ground level, from windows, in the roof space and by drone where it applies. The survey typically takes a time that depends on the roof’s area and construction, which we set out in the quote. From the street, a London terrace typically shows only its front slope or parapet, so in Northumberland Heath we work round the house, using the street, the windows, the loft and any safe vantage point behind it. If other people live in the building, tell us who can let us into the shared parts.
- We agree the area to be tested.
- The surface is prepared for the chosen method.
- Testing runs across the agreed area.
- We mark the breach locations in our records.
- The report is sent for your roofer to act on.
Before the survey
- Agree roof access with the managing agent if it is shared
- Have keys ready for side gates, garages or roof access doors
- Tell us about any leaks, stains or damp patches you know of
Booking a survey
We survey roofs on weekdays and at weekends. To arrange a day that suits you, phone 07833 053749 or send us an email with the address and the days you’d prefer.
Related advice
What electronic leak detection does not cover
Some things can’t be seen without opening up the roof, and that sets some limits:
- Build-ups without a suitable layer below
- Areas we cannot reach or that can’t be tested
- Repairing the breaches (that is for your roofer)
If you’re not sure which survey you need, ring 07833 053749 or send us an email and we will give you a straight answer. What a survey covers and does not.
What this survey covers
- Commercial flat roofs
- Green roofs
- Single-ply roofs
- Liquid-applied waterproofing
- Roof terraces and balconies
- Flat roof membranes
Questions from Northumberland Heath
Can parking be tricky for a visit in Northumberland Heath?
London parking needs a little planning, so let us know about permits, bays or a driveway when booking. That way the visit can be planned around it.
Do you cover Northumberland Heath?
We do. Every survey there gets the same written report with photographs, and visits run on weekdays and weekends.
Which method do you use?
The method is chosen to suit the roof. Low-voltage testing normally needs a wet surface, while high-voltage testing needs a dry, exposed membrane.
Does the weather affect the survey?
It can, depending on the survey. Drones cannot fly safely in high wind or heavy rain, and thermal imaging works best with a dry roof, little wind and a sunny day beforehand. We’ll rearrange with you if the weather is not right.
Do you climb onto every roof?
Not always. Safety comes first, and fragile or steep roofs cannot always be walked on. We use safe viewpoints, the loft space and a drone where it applies, and the report records anything we couldn’t see.
Does the report include photos?
Yes. The report includes photos of what we found, so you can see exactly what each finding refers to.
How is ELD priced?
Electronic leak detection is quoted for your roof, because the method depends on the roof. Size, build-up and access all affect the price. For a quote, phone 07833 053749 or email us.
Flat and commercial roofs around Northumberland Heath
With Hall Place and Gardens about 1.8 miles south, Northumberland Heath sits in an area with a long building history. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead, and a listed home or one in a conservation area may need consent for changes of material. Further from the centre, London’s housing takes in interwar semis with hipped roofs in clay or concrete tiles as well as slate-roofed terraces. If your home in Northumberland Heath is one of them, bay roofs, hips and later dormers each have their own details. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere.
For an older house near a landmark such as St Paul's, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof. Shop and office owners around Broadway Shopping Centre may find that flat roofs over shops and units are easy to forget until water comes through a ceiling.
Northumberland Heath is about 3 miles north-west of Dartford, in Greater London. Anywhere in Northumberland Heath, we can come and survey your property, on a weekday, Saturday or Sunday. Our area takes in places right across Greater London, from the larger towns to small villages. You can also see our page for London.
Surveys in DA8 and DA7 work the same way as everywhere else we cover. If you need electronic leak detection at a property on Mill Road, Penda Road and Chalk Road or a nearby road, we can survey it. If you’re just outside Northumberland Heath, we cover Bexley Riverside (1 mile south-east), Erith (1 mile north), Barnehurst (1 mile south), Belvedere (1 mile north-west) and Lessness Heath (1 mile north-west). Larger places within reach include London (11 miles west), City of Westminster (14 miles west), Marylebone (14 miles west), St Pancras (13 miles west), Shoreditch (11 miles west) and Walthamstow (11 miles north-west).
Near you in Northumberland Heath
We work in homes and buildings around Trinity School, The Royal Oak pub and Braeburn Park, among other places. The closest station to Northumberland Heath is Barnehurst station, about 0.6 miles south-west of the centre. Other landmarks nearby include Erith Museum (0.7 miles north-east) and Erith and District Hospital (within half a mile north). Green spaces nearby include Crossness Nature Reserve.
Towns and villages near Northumberland Heath
Other services in Northumberland Heath
How the survey changes by roof type
Liquid-applied waterproofing
Pinholes in a coating can let water through. ELD can help locate them on suitable roofs.
Green and ballasted roofs
Testing before planting or ballast goes on is simpler.