Greater London · London and the South East
Electronic leak detection in Downham, Greater London
Electronic leak detection in Downham from an independent, experienced roof surveyor. Over 5,000 surveys and 20+ years behind us.
- New roofs to check before paving or planting
- Failed seams and laps
- Leaks through a covered membrane
When you need someone else
No survey can tell you everything, and we’d rather be clear about that before booking. Keep these in mind:
- Leaks from plumbing or windows
- Parts of the roof covered by fixed equipment
- Repairing the breaches (that is for your roofer)
Not sure which survey suits your roof? You can ring 07833 053749 or drop us an email and we’ll tell you. What our survey covers.
Roofs we survey in Downham
- Single-ply roofs
- Commercial flat roofs
- Green roofs
- Liquid-applied waterproofing
- Roof terraces and balconies
- Flat roof membranes
About our electronic leak detection in Downham
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. You get a written report with photos of each breach found. We survey single-ply roofs, liquid-applied waterproofing and commercial flat roofs, and people most frequently book us about leaks that return after repairs and a flat roof leak that can’t be traced.
London has a lot of flat roofs: rear additions, dormers, roof terraces and the roofs of blocks and offices. They’re covered in felt, asphalt, EPDM rubber, GRP fibreglass or single-ply membranes, each with its own weak points. In Downham, 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.
What you get is a clear record of the flat roof membrane on the day we saw it. It’s useful right away, and a good reference for later, for example when you want to check whether anything has changed.
- Location
- Downham (BR1, SE6, SE12)
- Wider area
- Greater London
- Price
- Quoted for your roof
- Reports
- A written report with photos, by email
- Survey days
- Weekdays, Saturdays and Sundays
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Last updated
- 27 October 2026
Do you need electronic leak detection in Downham?
Flat roof membranes can be punctured by foot traffic, dropped tools or debris. Some are too small to see but water still finds them.
Things that frequently lead to a survey include:
- Failed seams and laps
- Punctures from foot traffic or tools
- Water coming in under a flat roof
- Breaches hidden under paving or planting
A roof leak in a hotel or guest house around Downham means lost rooms as well as repairs, so it pays to find faults before guests do.
Choosing a roof surveyor
- Whether the loft is part of the inspection
- How long the report takes to arrive
- Will the report include photos?
- What follow-up you get after the report
How we price electronic leak detection
We confirm the exact price before you book. This is what makes a difference:
- The type of building, from a house to a block or an office
- The size of the roof
- How tall the building is and how easy the roof is to see
- The use of thermal imaging or a drone
Every price we give includes VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You will know the price for your survey before you book.
What we need to know
The more you tell us, the easier it is to price the survey. When you contact us, tell us:
- Pictures from the garden or a window, if you have them
- Any deadline, such as an exchange date
- How the loft is reached, if there is one
- Where any leaks, stains or damp patches show inside
Booking is simple: just call 07833 053749 or email us, let us know about the property and we will suggest the right survey. We confirm the price before anything is booked.
Tips from our surveys
A few practical points come up again and again on our surveys. They’re worth knowing whatever the roof:
- Keep a note of leaks after rain
- Ask contractors to protect the membrane
- Stay off the flat roof unless needed
- Consider ELD before paving or planting goes on
Wet insulation may need attention after a leak. That’s something to discuss with your roofer and other checks can help judge it.
ELD before paving, ballast or planting goes on is worth considering. Finding breaches is simpler at that stage.
Downham questions
Does a conservation area affect roof work in Downham?
Check Historic England’s online list first, then ask the council about conservation areas and any Article 4 direction. The answer matters most when a change of material is on the cards.
Do you cover commercial flat roofs around Downham?
Yes, commercial flat roofs are part of what we cover. Larger commercial roofs are quoted for the building.
How many surveys have you done?
We have completed more than 5,000 surveys, over more than 20 years, with 98% customer satisfaction.
How do I book a survey in Downham?
The quickest way is to ring 07833 053749 or drop us an email. Give us the address and some details about the roof, and we’ll take it from there. We survey on weekdays, Saturdays and Sundays.
Is this an asbestos survey?
No. Asbestos surveys and testing are not part of what we do. We flag materials that could contain asbestos, like cement sheets or soffits on pre-2000 buildings and suggest a specialist asbestos surveyor checks them before any work.
Can you inspect my roof with a drone?
Yes, where it is applicable. Whether we can fly on the day depends on the weather and the airspace rules, including flight restriction zones near airports. We hold a CAA Flyer ID and Operator ID.
Which method do you use?
It depends on the membrane and the build-up. Low-voltage testing typically needs a wet surface and high-voltage methods need the membrane dry and exposed.
Roof by roof
Single-ply membranes
Single-ply can be punctured by tools or fixings. Testing helps find them.
Green and ballasted roofs
ELD is easier on a new roof before it is covered.
How it works
A survey visit follows a simple order: we hear what you’ve seen, look at the roof from every safe viewpoint, take photographs as we go and record our findings for the written report. Most visits take a time that depends on the membrane area and the build-up, which we’ll explain when we quote. In Downham, as in much of London, plenty of properties are flats or terraces without side access, so rear slopes are viewed from windows, the loft or, where a flight is allowed, by drone. Mention any building rules, key holders or managing agents as you book.
- We start with what you know about the roof and the leak.
- The roof is assessed for suitability first.
- We choose a low-voltage or high-voltage method to match the roof.
- We test the roof and locate any breaches.
- You get a report with photos of each breach.
Before the survey
- Find any records of previous roof work
- Agree roof access with the managing agent if it’s shared
- Clear the way to the loft hatch
Arrange a survey
To book a survey, ring 07833 053749 or drop us an email with the address and what you’d like to know about the roof. You will know the price before anything is booked.
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Places near Downham
What else we do in Downham
Electronic leak detection in Downham: local notes
Outer London has plenty of Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, often with hipped roofs in clay or concrete tiles. Bay roofs, hip ridges and dormers from later loft conversions are the details that set these houses apart. Mixed in with those pitched roofs are a good many flat ones, over rear extensions, dormers, garages and shops. Bromley Palace, about 1.7 miles south-east, is one of the historic houses in the wider area around Downham. On older houses around here, roofs frequently 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.
If you run a business near The Glades, flat roofs over shops and units are easy to forget until water comes through a ceiling. Take an older house close to St Barnabas: flat-roofed rear additions and dormers added over the years are worth checking.
Downham is about 2 miles north of Bromley, in Greater London. We carry out electronic leak detection for homes and businesses in Downham and nearby. Our area takes in places right across Greater London. Our London page covers surveys nearby.
We cover every part of BR1, SE6 and SE12 for electronic leak detection. Streets in the area include Shaw Road, Arcus Road and Brook Lane. Nearby, we also carry out electronic leak detection in Plaistow (1 mile south), Grove Park (1 mile north-east), Sundridge (1 mile south-east), Chinbrook (1 mile east) and Bellingham (1 mile west). Larger places within reach include London (7 miles north-west), City of Westminster (9 miles north-west), Marylebone (9 miles north-west), Kensington (10 miles north-west), St Pancras (9 miles north-west) and Shoreditch (8 miles north-west).
Around Downham
Locally, jobs take us to homes and businesses close to Holy Trinity College Bromley, Downham Fields and Bonus Pastor Catholic College. The nearest railway station is Grove Park station, roughly 0.8 miles north-east of the centre. Other landmarks nearby include The Glades (1.6 miles south) and Greenwich Castle (3.6 miles north). For a walk, there is Summer Hill and Downham Woodland Walk.