Greater London · London and the South East
Electronic leak detection in Dulwich, Greater London
Electronic leak detection to pinpoint holes in flat roof membranes in Dulwich, with drones and thermal imaging where they help. Get in touch for a price.
- Leaks that return after repairs
- Leaks under green or ballasted roofs
- Holes left by work on the roof
What electronic leak detection looks like in Dulwich
With Kingswood House about 1.1 miles south, Dulwich sits in an area with a long building history. Older homes in the wider area often have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years. Welsh slate on Victorian and Edwardian terraces is a familiar sight across inner London. From the street you may see only a parapet, with a butterfly roof and a valley gutter behind it draining to the back. If your home in Dulwich is one of them, lead flashings, party-wall upstands and shared chimney stacks are part of the picture too. Mixed in with those pitched roofs are lots of flat ones, over rear extensions, dormers, garages and shops.
If you let a flat or house near West Dulwich station, the flat roof over a let home is worth a look before it becomes a tenant complaint. For businesses in and around places such as Lewisham Shopping Centre, the flat roofs over shops and commercial units are worth checking before a leak, not after. If you live in an older home near Christ's Chapel of God's Gift, flat-roofed rear additions and dormers added over the years are worth checking.
Dulwich is about 1 mile south-east of Herne Hill, in Greater London. We survey roofs in Dulwich and the surrounding area as part of our work across London and South East England. Across Greater London, we cover Dulwich.
Every address in SE22, SE21 and SE23 is covered for electronic leak detection. Whether your property is on Court Lane, Druce Road and Boxall Road or anywhere close by, we can survey it. With the A2216 close by, Dulwich is simple for us to get to. Other places close to Dulwich include Dulwich Village (1 mile north-west), West Dulwich (1 mile south), Herne Hill (1 mile north-west), Sydenham Hill (1 mile south-east) and Forest Hill (1 mile east). Within a short drive, we also cover London (4 miles north), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles north-west), St Pancras (6 miles north) and Shoreditch (6 miles north).
What’s near Dulwich
We work in homes and buildings around The Crown and Greyhound pub, Dulwich Park and Alleyn's School. The closest station to Dulwich is West Dulwich station, about 0.7 miles south-west. Other landmarks nearby include Dulwich Community Hospital (0.9 miles north) and Greenwich Castle (4 miles north-east). For a walk, there is Knight's Hill and Centre for Wildlife Gardening.
Electronic leak detection for homes and businesses in Dulwich
ELD is a way of pinpointing breaches in a flat roof’s waterproofing membrane. 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. The results come in a report with photos. We survey commercial flat roofs, single-ply roofs and liquid-applied waterproofing, and common reasons people get in touch are damp inside with no sign on the roof and breaches hidden under paving or planting.
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. For a building in Dulwich, access is agreed with whoever manages the roof ahead of the visit. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
Findings are set out part by part, from the coverings down to the gutters, each with a short note and a photograph. You’ll see the good as well as the bad.
- Location
- Dulwich (SE22, SE21, SE23)
- Wider area
- Greater London
- Prices
- Quoted for your roof
- Report
- Emailed report with photos and recommendations
- Appointments
- Weekdays and weekends
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
When you need someone else
To be straight with you, there are limits to any roof survey:
- Water entering through details rather than the membrane
- Areas we can’t reach or that cannot be tested
- How wet the insulation is
If in doubt, call 07833 053749 or drop us an email and we will point you to the right survey before you book. The full list of what we check.
Roof types and parts we check
- Green roofs
- Commercial flat roofs
- Single-ply roofs
- Flat roof membranes
- Liquid-applied waterproofing
- Roof terraces and balconies
Places near Dulwich
More services for Dulwich
Leave it or get it looked at?
Patching where you think the leak is often misses it. ELD shows the actual breach points. In Dulwich, as in much of London, water from a roof defect can reach a neighbour’s home as easily as yours: failed flashings and blocked valley gutters can send water into more than one home. Dealing with it early is far less disruptive.
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. You will know the figure before booking.
Why choose Independent Roof Survey in Dulwich
- Surveys seven days a week
- Over 20 years’ experience
- 5,000+ surveys completed
- 98% of customers satisfied
Read how roof surveys are priced and what we found on two real jobs.
Practical tips
Over many surveys, some simple habits stand out:
- Limit access to the roof
- Check new waterproofing before handover
- Act on new leaks promptly
- Keep a note of leaks after rain
If water has been getting in, insulation under the membrane may be wet. Your roofer can advise on that, and moisture readings can help.
Consider testing a new membrane before it is covered. Finding breaches is simpler at that stage.
Questions from Dulwich
Does a conservation area affect roof work in Dulwich?
Historic England’s list shows listed buildings, and the local council can tell you about conservation areas. Listed building consent is needed for changes that affect a listed building’s special interest, and conservation areas can limit changes of roofing material.
Do you carry out roof surveys in Dulwich?
Yes, Dulwich is within the area we cover. We work right across London and the South East. Just ring 07833 053749 or send us an email and let us know about the property, and we’ll talk through which survey suits.
Will I get photos?
Yes. Photos are part of every report, so you can see each point for yourself.
Does this replace a RICS home survey?
No. This is a survey of the roof only, so it is not a RICS Level 2 or Level 3 survey. Many buyers have both.
How soon will I get the report?
Each package has its own report time. Basic is within 48 hours, Standard is 24–48 hours and Premium is the same day. Mention any deadline when booking.
Can every flat roof be tested?
That depends on the roof’s membrane and layers. Share any details you have and we will check whether ELD will work.
How much does electronic leak detection cost?
Electronic leak detection is quoted for your roof, because the method depends on the roof. Size, build-up and access all affect the price. To get a quote, call 07833 053749 or use the contact form.
Should I look at the roof myself first?
Fresh stains on ceilings or walls after rain are worth noting. Take a photo and write down when you saw it, which helps when we check the roof.
Watch the gutters in a downpour, from a window or the ground. Water spilling over the edge can point to a blockage or a sagging run.
Rented homes, blocks and businesses
We survey roofs for landlords and letting agents as well as householders. The report gives you a dated record of the flat roof membrane, with photos, useful for planning maintenance.
Letting agents can arrange access with tenants. Surveys run seven days a week, which can make access easier.
What happens on the day
We photograph the roof as we go, so the report shows exactly what we saw. We take close-ups from wherever is safe, including by drone where it’s applicable and the weather allows. A typical visit takes a length of time set by the size of the roof and how it’s built, and we’ll give you a guide when quoting. Surveys in Dulwich can be booked for any day of the week. It helps if you can point us to a visitor permit or a nearby bay. A back bedroom window can be the best vantage point for a rear addition, so we may ask to use one.
- We start by finding out what the roof is made of and where it leaks.
- We check that the membrane and build-up suit electronic leak detection.
- We pick the low-voltage or high-voltage method that suits the roof.
- We test the membrane and find where current is passing through it.
- The breaches are recorded with photos in a report for your roofer.
How to prepare
- Buyers: confirm access with the estate agent or seller
- For flats, make sure roof access has been agreed
- Move anything stored under the loft hatch
How to book
Buyers should book once an offer has been accepted, so there’s time to use the report before exchange. For any other survey, just call 07833 053749 or send us an email when you’re ready.