Greater London · London and the South East
Blackwall Electronic Leak Detection
Not sure what state the flat roof membrane is in? We carry out electronic leak detection in Blackwall and across Greater London.
- Damage from equipment installers
- Patched roofs that still leak
- Leaks under green or ballasted roofs
Electronic leak detection for homes and businesses in Blackwall
Water can travel under a flat roof membrane before it shows inside. That makes leaks hard to trace by eye. ELD tests the waterproofing directly, to find where it has been breached. It’s testing only, and the repair is for your roofer. On suitable roofs, it replaces guesswork with a located breach. We then send you the results in a written report. If you are worried about breaches hidden under paving or planting and stains far from any visible defect, we can find out what’s behind it.
Commercial and residential blocks across London often have big flat roofs with plant, rooflights and access walkways. Each pipe, upstand and fixing through the covering is a possible weak point. In Blackwall, 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 works through the roof section by section, from the main slopes down to the gutters and outlets, with a note and a photo for each point. You will see the good as well as the bad.
- Place
- Blackwall (E14, SE10, E16)
- Wider area
- Greater London
- Prices
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- When we survey
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
How the survey works
Expect us to ask a few questions before we start, such as when any problem began and what work has been done before. Then the inspection itself takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. London terraces rarely offer a view of the whole roof from one spot, so a visit in Blackwall moves between viewpoints: the pavement, upstairs windows, the loft and any safe spot at the back. If other people live in the building, let us know who can let us into the shared parts.
- First, we confirm which roof areas are included.
- 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.
How to prepare
- Have any questions written down, so nothing gets missed
- For a flat or shared roof, check access with the freeholder or managing agent
- If you are buying, let the agent know when we’re coming
Arrange a survey
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, phone 07833 053749 or send us an email.
Related advice
Why act early in Blackwall
Leaks left running can wet the insulation and deck. Locating it early helps limit the damage. In Blackwall, as in much of London, water from a roof defect can reach a neighbour’s home as easily as yours: a blocked parapet gutter or slipped slate can let water into the flat below or the house next door. Finding it early keeps the work smaller.
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 it can be reached and seen safely. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Why book with us
- 20+ years’ experience
- 5,000+ roofs surveyed
- 98% customer satisfaction
- An independent look at the roof
Take a look at how roof surveys are priced or two real surveys.
Honest limits
To be straight with you, there are limits to any roof survey:
- Some conductive membranes
- Water entering through details rather than the membrane
- Moisture spread under the membrane
If you’re not sure which survey you need, call 07833 053749 or drop us an email and we’ll give you a straight answer before you book. What our survey covers.
What we check
- Single-ply roofs
- Liquid-applied waterproofing
- Roof terraces and balconies
- Flat roof membranes
- Commercial flat roofs
- Green roofs
Rented homes, blocks and businesses
Freeholders and residents’ companies use a roof report to plan and budget.
Letting agents can arrange access with tenants, at a time agreed beforehand. We survey seven days a week, which helps when tenants work during the week.
Blackwall: your questions answered
Is my home in Blackwall listed or in a conservation area?
The council and Historic England’s list are the places to check. Either can affect what roof work is allowed, so it is worth checking before planning any.
Will parking be an issue for a roof survey in Blackwall?
It depends on the street. If Blackwall has controlled parking where you are, a visitor permit is the easiest answer, and a driveway is even better.
Do you test for asbestos?
No. We do not sample or test for asbestos. The report may flag materials that could contain asbestos on buildings built or refurbished before 2000, with a recommendation to have a specialist asbestos surveyor check before it’s disturbed.
Does ELD include fixing the breach?
No. We test the membrane and report. The report shows where each breach is for your roofer to repair.
How do I book a survey in Blackwall?
It is easiest to ring 07833 053749 or send us an email. Tell us the address and a little about the roof, and we will take it from there. Surveys run on weekdays and at weekends.
Do you need to get into the loft?
Usually, if there is one and it can be reached safely. The roof space can show things the outside cannot, such as damp timbers, staining or daylight.
How long does electronic leak detection take?
Testing usually takes a time that depends on the roof’s area and construction, and we’ll give you a guide when quoting.
Flat and commercial roofs around Blackwall
The wider area around Blackwall has a long history of building, with Queen's House about 1.7 miles south. 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. Welsh slate on Victorian and Edwardian terraces is a familiar sight across inner London. Many have butterfly roofs draining to a central valley gutter, with parapet walls and gutters hidden behind them. In a house like that, shared stacks, party-wall upstands and lead flashings all need looking at as far as they can be seen. Mixed in with those pitched roofs are plenty of flat ones, over rear extensions, dormers, garages and shops.
If yours is one of the older homes in the streets near All Saints Church, the flat roofs on later extensions tend to wear out long before the main roof. For businesses in and around places such as Surrey Quays Shopping Centre, a flat roof over a business is out of sight and out of mind until it leaks. For site and facilities teams at buildings such as Woolmore Primary School, schools and public buildings often have big flat roofs, and their outlets and upstands need regular checks.
Blackwall is about 1 mile south-west of Canning Town, in Greater London. Blackwall is part of the area we cover and the surrounding area as part of our work across London and South East England. Blackwall is one of the towns and villages in Greater London we cover.
All of E14, SE10 and E16 is within our area for electronic leak detection. If you need electronic leak detection at a property on Nutmeg Lane, Athol Square and Leamouth Road or a nearby road, we can survey it. You’ll find Blackwall on the A102 and A1206, which makes it straightforward to reach. Other places close to Blackwall include Coldharbour (1 mile south-west), Leamouth (1 mile north-east), Limmo Peninsula (1 mile north-east), Poplar (1 mile west) and London Docklands (1 mile west). We also work in nearby towns such as London (4 miles west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (9 miles west), St Pancras (5 miles west) and Shoreditch (3 miles north-west).
What’s near Blackwall
We work in homes and buildings around The Gun pub, Tower Hamlets College and Bow Creek Ecology Park, among other places. Blackwall’s nearest station is Canary Wharf station, about 0.6 miles west. Well-known places in the area include Poplar Hospital (under half a mile north-west) and London Gas Museum (1.1 miles north). Not far away are Lavender Pond and Tower Hill.
What you can safely check yourself
After strong wind, take a look from the pavement or garden: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Do not go up yourself.
The one thing to avoid is getting up close. Slates, tiles, flat roofs and rooflights can give way. That part is for a survey.
What we look for on each type of roof
Liquid-applied waterproofing
Testing a liquid-applied roof depends on what’s beneath the coating.
EPDM rubber roofs
EPDM is a long-lasting flat roof membrane, but punctures and seam failures still happen.