Greater London · London and the South East
Stockwell Electronic Leak Detection
Electronic leak detection to pinpoint holes in flat roof membranes in Stockwell, using drones and thermal imaging where it applies. Call or email for a price.
- Punctures from foot traffic or tools
- Gaps at membrane joints
- Breaches hidden under paving or planting
Electronic leak detection in Stockwell
We carry out electronic leak detection on flat roofs in Stockwell and across London and South East England. Testing normally takes as long as needed for the size of the roof and how it’s built, which we’ll explain when we quote. Electronic leak detection is quoted for your roof, because the method depends on the roof. The results come in a written report with photos. Common reasons to book are leaks through a covered membrane and leaking laps in the waterproofing, on roof terraces and balconies, liquid-applied waterproofing and green roofs.
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 Stockwell, 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.
Where we cannot see part of the flat roof membrane, the report says so. You will know exactly what was inspected and what wasn’t, and what we’d suggest next.
- Location
- Stockwell (SW9, SW4, SW8)
- Wider area
- Greater London
- Prices
- Quoted for your roof
- Reports
- Emailed report with photos and recommendations
- Survey days
- Weekdays, Saturdays and Sundays
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
Questions from Stockwell
Does a conservation area affect roof work in Stockwell?
The council and Historic England’s list are the places to check. It’s worth checking before planning roof work, as both can affect what’s allowed.
Is parking a problem for a survey in Stockwell?
Typically it is manageable with a little notice. Let us know the parking rules on your street and we’ll work around them.
Is this an asbestos survey?
No. Asbestos surveys and testing are not part of what we do. If we see materials that could contain asbestos, like cement roof sheets or soffits on buildings from before 2000, we flag them, and recommend a specialist asbestos surveyor checks them before they’re disturbed.
Do you look in the roof space?
Yes, where the survey calls for it and there’s safe access. We look for staining, damp, daylight and signs of movement.
Can you give me structural calculations?
No. We are experienced roof surveyors, and visible signs such as sagging are noted, but we don’t provide calculations or an engineer’s opinion. The report will say if you need an engineer.
Which days do you carry out surveys?
Surveys can be booked for any day of the week: Monday to Friday, Saturdays and Sundays. Tell us which days suit you as you book.
How much does electronic leak detection cost?
Electronic leak detection is quoted for your roof, because the method depends on the roof. The price depends on the roof’s size and build-up. To get a quote, call 07833 053749 or drop us an email.
Why act early in Stockwell
Leaks left running can wet the insulation and deck. Locating it early helps limit the damage. In Stockwell, 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: its size, its height, how many sections it has and how safely it can be seen. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Why book with us
- Drones and thermal imaging where applicable
- Covered by professional indemnity and public liability insurance
- Photographs and a written report every time
- Independent findings on the roof’s condition
Take a look at what a roof survey costs and what we found on two real jobs.
How it works
There isn’t much for you to do on the day. Point out anything you’ve noticed, such as stains, drips or loose pieces, and we will get on with the inspection. The survey itself takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. In converted houses and mansion blocks, the loft hatch is often on a shared landing. If that applies to your building, it helps to agree access with the neighbours or the managing agent first. Otherwise, the visit in Stockwell runs like any other.
- You let us know about the roof and where water is showing.
- We check whether the membrane and build-up suit ELD.
- We choose a low-voltage or high-voltage method to match the roof.
- The membrane is tested and breaches are found.
- You get a report with photos of each breach.
Before the survey
- Jot down any questions you want answered
- If it is not your property yet, arrange access through the agent
- Show us where any leaks or stains appear
Getting a price
Most bookings start with a short call: ring 07833 053749 or use the contact form, and we will ask about the building and what you need. The price is agreed before a date is set.
Related advice
When you need someone else
In fairness, a roof survey has limits:
- Roofs whose membrane or build-up is not suitable
- Repairing the breaches (that is for your roofer)
- How wet the insulation is
If you are 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.
Roofs we survey in Stockwell
- Roof terraces and balconies
- Commercial flat roofs
- Liquid-applied waterproofing
- Flat roof membranes
- Green roofs
- Single-ply roofs
When to book a survey in Stockwell
New membranes can have defects from installation. Testing before the roof is covered or handed over helps find them.
Typical things we are asked to look at include:
- Leaks through a covered membrane
- Leaks through a flat roof with no obvious cause
- Damage from equipment installers
- Damp inside with no sign on the roof
For hotels and guest houses around Stockwell, a roof problem found early is far less disruptive than one found by a guest, so it pays to find faults before guests do.
Before booking anyone
- Their insurance cover
- What exactly goes into their report
- Their drone registration, if they fly one
- How soon the report will arrive
Flat roofs in Stockwell
Carlyle's House, about 2.4 miles north-west, is one of the historic houses in the wider area around Stockwell. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and the council can say whether a home is in a conservation area. Welsh slate on Victorian and Edwardian terraces is a familiar sight across inner London. A butterfly roof with a central valley gutter, tucked behind a parapet wall, is common on these houses. 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 a good many flat ones, over rear extensions, dormers, garages and shops.
If you run a business near Gabriel's Wharf, a flat roof over a business is out of sight and out of mind until it leaks. Take a building like St Andrew's Church of England Primary School: large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly.
Stockwell is about 2 miles south-west of London, in Greater London. Anywhere in Stockwell, we can carry out electronic leak detection at your property, on a weekday, Saturday or Sunday. Across Greater London, we cover Stockwell and the places around it.
We survey roofs across the SW9, SW4 and SW8 postcode area for electronic leak detection and the streets around it. Whether your property is on Kay Road, West Road and Cato Road or a nearby road, we can help. You’ll find Stockwell on the A203 and A2217, so it is easy for us to get to. We also cover Little Portugal (1 mile north), Angell Town (1 mile east), North Brixton (1 mile north-east), South Lambeth (1 mile north) and Clapham (1 mile west). We also work in nearby towns like City of Westminster (3 miles north-west), Marylebone (4 miles north), Kensington (4 miles north-west), St Pancras (4 miles north), Shoreditch (4 miles north-east) and Walthamstow (9 miles north-east).
Landmarks near Stockwell
Locally, jobs take us to homes and businesses close to Max Roach Park, Lansdowne School and The Marquess Of Lorne Public House and the streets around them. The closest station to Stockwell is Brixton station, roughly 0.5 miles south-east of the centre. Nearby you’ll also find Gabriel's Wharf (2.8 miles north) and Baynard's Castle (3.1 miles north). Not far away are Knight's Hill and Centre for Wildlife Gardening.
Towns and villages near Stockwell
More services for Stockwell
Useful tips for Stockwell property owners
A survey works best with a little help from you, before and after. Some tips:
- Use boards when working on the roof
- Don’t let outlets block
- Act on new leaks promptly
- Check new waterproofing before handover
After your roofer repairs the breaches, a retest can confirm them, where the roof still suits the method.
ELD before paving, ballast or planting goes on is worth considering. Finding breaches is simpler at that stage.
What affects the cost of electronic leak detection
Every roof is different, so prices are confirmed before booking. These are the things that affect it:
- Commercial roofs and larger buildings
- The number of roofs, including extensions and garages
- The shape of the roof and its details
- Any need for thermal images or a drone flight
All our prices include VAT. We quote electronic leak detection for each roof, as the method and time depend on the roof. You’ll know the exact price before booking.
What we need to know
There is no need for technical words. It is enough to let us know:
- The address and postcode of the property
- Any stains, drips or damp patches you’ve seen indoors
- The type of building and roof, like pitched or flat
- Pictures of the roof from a safe spot, if you have them
We confirm the price for your roof before booking, so you know the cost up front. Electronic leak detection is quoted for your roof, because the method depends on the roof. To book, ring 07833 053749 or drop us an email.