Greater London · London and the South East
Electronic leak detection in Lewisham, Greater London
Find out what’s going on with the flat roof membrane before you spend money on it. We carry out electronic leak detection in Lewisham.
- Leaks at pipes, outlets or fixings
- Breaches hidden under paving or planting
- Leaking laps in the waterproofing
Electronic leak detection in Lewisham
Electronic leak detection works on many flat roof membranes over offices, units, blocks of flats and homes. It helps trace a leak you already have or to test a new membrane before it is covered. Each roof is quoted on its size and build-up. We can test on weekdays and at weekends when conditions allow. Tell us about your roof to find out more. If you’ve noticed failed seams and laps and a flat roof leak that can’t be traced, a survey will tell you what’s going on, whatever the roof.
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 block or conversion in Lewisham, the flat roof is often a shared part of the building.
Findings are set out part by part, from the coverings down to the gutters. You will see the good as well as the bad.
- Where
- Lewisham (SE13, SE8, SE6)
- Region
- Greater London
- Prices
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- Appointments
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
The survey, step by step
We work from the outside in: first the slopes, edges and gutters from every safe viewpoint, then the loft space where it can be reached. All told, expect more time on a big roof than a small one, and the build-up of the roof makes a difference too. In a London conversion, the way into the loft space is often from a communal landing or the top flat. If that applies to your building, it is useful to agree access with the neighbours or the managing agent first. Everything else is planned around the building, not the postcode.
- You tell us about the roof and where water is showing.
- The roof is assessed for suitability first.
- The test method is chosen to suit the roof.
- The membrane is tested and breaches are found.
- A report with photos shows where each breach is.
Getting ready for the survey
- If it isn’t your property yet, arrange access through the agent
- Tell us where we can park nearby
- Have any paperwork from past roof work to hand
Booking a survey
We confirm the exact price before you book, so you know where you stand. Electronic leak detection is quoted for your roof, because the method depends on the roof. To book, ring 07833 053749 or send us an email.
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Honest limits
We only report what can be seen safely on the day, so some things are outside what a survey can do:
- Water entering through details rather than the membrane
- Areas we can’t reach or that cannot be tested
- Roofs whose membrane or build-up isn’t suitable
If you are not sure which survey you need, call 07833 053749 or send us an email and we will give you a straight answer before you book. The full list of what we check.
Roof types and parts we check
- Single-ply roofs
- Flat roof membranes
- Commercial flat roofs
- Roof terraces and balconies
- Liquid-applied waterproofing
- Green roofs
Checking the roof from the ground
The one thing to avoid is getting up close. Slates, tiles, flat roofs and rooflights can give way, and a fall can be serious. That part is for a survey, using safe viewpoints and a drone where it applies.
Inside, the loft is a good place to look, with care. Use a torch and stay on the joists or boards, and look for staining, damp timber or daylight coming through.
Flat and commercial roofs around Lewisham
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. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere. The wider area around Lewisham has a long history of building, with Queen's House about 1.4 miles north. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead, and the council can say whether a home is in a conservation area.
Take a building like St Saviour's Catholic Primary School: ponding and blocked outlets on a wide flat roof are worth catching before the next wet season. If you run a business near Lewisham Shopping Centre, a flat roof over a business is out of sight and out of mind until it leaks.
Lewisham is about 3 miles west of Eltham, in Greater London. Lewisham is one of many places we visit across Greater London, for homes and businesses alike. Lewisham is one of the towns and villages in Greater London where we work.
Postcode districts we cover here for electronic leak detection: SE13, SE8 and SE6. We offer electronic leak detection to properties on Station Road, Lewisham High Street and Lewis Grove and the roads around them. With the B220 close by, Lewisham is easy for us to reach for electronic leak detection. Nearby, we also carry out electronic leak detection in Ladywell (1 mile south-west), St Johns (1 mile north-west), Hither Green (1 mile south-east), Blackheath (1 mile north-east) and Lee (1 mile south-east). Larger places within reach include London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west), Kensington (9 miles west), St Pancras (6 miles north-west) and Shoreditch (5 miles north-west).
Landmarks near Lewisham
Around Lewisham, our work takes us to homes and buildings near St Joseph's Academy, Ladywell Fields and The Watch House. Lewisham has its own railway station: Lewisham station. Well-known places in the area include Greenwich Castle (1.2 miles north) and Fan Museum (1.2 miles north). For a walk, there is Knight's Hill and Brookmill Road Local Nature Reserve.
Tips that help
You do not need to be a roofer to help. What helps most:
- Consider ELD before paving or planting goes on
- Make sure trades protect the waterproofing
- Keep outlets clear of debris
- Find the breach before more patching
Once repairs are made, the roof can be tested again if you want to check them if the build-up allows.
Consider testing a new membrane before it’s covered. Finding breaches is simpler at that stage.
What we are asked to look at in Lewisham
If a flat roof keeps leaking after patching, the hole may be elsewhere. ELD can locate the breach more precisely.
Things that often lead to a survey include:
- New membranes needing a check before handover
- Patched roofs that still leak
- Damage from equipment installers
- A flat roof leak that cannot be traced
If you let a flat or house near Lewisham station, the flat roof over a let home is worth a look before it becomes a tenant complaint.
What to check before booking
- What follow-up you get after the report
- What insurance they carry
- Whether the loft space is looked at, where there is one
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
Places near Lewisham
Also in Lewisham
What happens if roof problems are left?
Some breaches are too small to see. ELD picks up breaches a visual check might miss where the roof suits it. Many older London roofs have only old felt under the slates, or no underlay at all, so once the slates or flashings let water past, little stops it reaching ceilings. Left alone, that means wet timbers and plaster, which is a far bigger job than the roof fault itself.
All our prices include VAT. We quote electronic leak detection for each roof, as the method and time depend on the roof. We confirm the price for the job before booking.
Why book us in Lewisham
- CAA-registered drone operator (Flyer ID and Operator ID)
- More than 20 years surveying roofs
- Insured for professional indemnity and public liability
- An independent view of the roof
Take a look at how roof surveys are priced and what we found on two real jobs.
Common questions in Lewisham
Can parking be tricky for a visit in Lewisham?
Usually it’s manageable with a little notice. Let us know what parking is available nearby, and the visit is planned around it.
Can you look at the flat roof of a hotel or office near Lewisham?
Yes, we cover commercial roofs as well as homes. Roof access is agreed with the building manager or owner beforehand.
How do I book a survey in Lewisham?
Simply ring 07833 053749 or send us an email. We will ask a few questions, confirm the price and agree a date, weekday or weekend.
What does the report include?
It sets out what we found, why it matters and what we recommend, with photos throughout. Anything we couldn’t see safely is noted too, so you know exactly what was covered.
Which method do you use?
The method is chosen to suit the roof. Low-voltage methods are normally carried out on a wet roof and high-voltage methods need the membrane dry and exposed.
What’s the price of ELD?
We quote electronic leak detection for each roof, as the method and time depend on the roof. The price depends on the roof’s size and build-up. To get a quote, ring 07833 053749 or send us an email.
Can you inspect my roof with a drone?
Where it helps and it is safe, yes. Flights depend on the weather on the day and airspace rules. We hold a CAA Flyer ID and Operator ID.