Greater London · London and the South East
Electronic leak detection in New Cross, Greater London
A careful look at the flat roof membrane at your property in New Cross, with photos and a written report.
- Leaks under green or ballasted roofs
- Water coming in under a flat roof
- New membranes needing a check before handover
Practical tips
Nothing here needs a ladder. Our suggestions:
- Clear flat roof outlets regularly
- Keep foot traffic on flat roofs to a minimum
- Share any drawings of the roof
- Check new waterproofing before handover
If anything in the report is not clear, ask us. We can talk you through the findings.
Make sure contractors protect the waterproofing when they work up there. Have the roof looked at after other work.
How electronic leak detection works in New Cross
Water can travel under a flat roof membrane before it shows inside. So the stain inside rarely sits under the hole. ELD tests the waterproofing directly, to find where it has been breached. It’s testing only and leave the repair to your roofer. On suitable roofs, it replaces guesswork with a located breach. The results then follow in a written report with photos. If you’ve noticed a flat roof leak that can’t be traced and leaking laps in the waterproofing, a survey will tell you what’s going on, on liquid-applied waterproofing, commercial flat roofs and single-ply roofs alike.
Water getting through a flat roof in London can travel under the covering and appear some way from the hole. Outlets, upstands against parapet walls and joins with the main roof are frequent culprits. In a converted house in New Cross, the roof above may belong to the building rather than one flat.
Nothing in the report is left vague: where something needs attention, it says so plainly, along with how urgent it is.
- Location
- New Cross (SE8, SE14, SE4)
- Wider area
- Greater London
- Price
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- Appointments
- Weekdays, Saturdays and Sundays
- Insured
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
How the survey changes by roof type
Liquid-applied waterproofing
Liquid waterproofing has no laps but holes and thin areas can occur. Whether ELD works depends on the coating and build-up.
Single-ply membranes
Single-ply can be punctured by tools or fixings. ELD can locate them.
The survey, step by step
We look at the roof from outside and, where it is relevant and there’s safe access, from inside the loft space too. In the loft, the signs we look for are staining, damp, daylight and sagging, as far as the space allows. The whole visit normally takes a time that depends on the size of the roof and how it’s built, and we’ll give you a guide when quoting. Surveys in New Cross can be booked for any day of the week. It helps if you can point us to a visitor permit or a nearby bay. Upstairs rooms at the back are useful too, as they frequently give the best view of a rear addition.
- 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.
- The roof is tested and any breaches are located.
- We send a report with photos of each breach so your roofer can repair it.
Getting ready for the survey
- Have keys ready for side gates, garages or roof access doors
- If you are buying, check with the agent that we can get in
- Have any paperwork from past roof work to hand
Getting a price
Most bookings start with a short call: call 07833 053749 or send us an email, and we will ask about the building and what you need. You’ll have a price before anything is arranged.
Advice
Also in New Cross
What affects the cost of electronic leak detection
To price your survey, we look at:
- Height and safe access
- Extra roofs, like extensions, dormers or garages
- How complicated the roof is, with its valleys, chimneys and parapets
- Whether thermal imaging or a drone is needed
All our prices include VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You’ll know the price for your survey before booking.
Helping us price your survey
Getting the details right at the start saves time. Please include:
- What made you get in touch
- Photos of the roof, taken safely from ground level or a window
- Any marks or damp showing indoors
- Whether there’s a loft hatch, a shared roof or tricky access
Every survey is priced before it’s booked, so you know where you stand. We quote electronic leak detection for each roof, as the method and time depend on the roof. To book, call 07833 053749 or email us.
Why act early in New Cross
Water trapped under a membrane can soak insulation and decking. Locating it early helps limit the damage. A hidden valley or parapet gutter on a London house can hold water for weeks before anyone notices. When the stain finally shows, the damage underneath is often older than it looks.
For a price for your roof in New Cross, call 07833 053749 or drop us an email and tell us about the roof. We will confirm the figure before booking.
Why us?
- CAA-registered drone operator (Flyer ID and Operator ID)
- Plain-English reports with photos
- Surveys on any day of the week
- 5,000+ surveys completed
See what a roof survey costs and our case studies.
Common roof problems in New Cross
Work on the roof can damage a membrane. Engineers fitting equipment, solar panels or aerials may leave damage behind.
A survey can pick up problems such as:
- Gaps at membrane joints
- Leaks that return after repairs
- Holes around roof penetrations
- Leaks under green or ballasted roofs
If you live in an older home near St James's Church, the joins between later flat roofs and the old walls are where problems usually start.
What to check before booking
- What the report includes, and whether it has photos
- Do they have a CAA Flyer ID and Operator ID for drone work?
- Whether the loft is part of the inspection
- What happens after the report arrives
Flat roofs in New Cross
Welsh slate on Victorian and Edwardian terraces is a familiar sight across inner London. Behind many of their parapets sit butterfly roofs and valley gutters that can’t be seen from the pavement. Shared chimney stacks, party-wall upstands and lead work come with this kind of house. Next to the main roofs there is usually a flat roof somewhere, whether on an extension, a garage or a commercial unit. Queen's House, about 1.5 miles north-east, is one of the historic houses in the wider area around New Cross. Older homes in the wider area frequently have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and any change of roofing material on a listed home needs checking with the council first.
For landlords with property near New Cross station, flat roofs on let property tend to be checked only when they fail, which is the costly way round. If you look after a shop, office or commercial unit, for example near Lewisham Shopping Centre, flat roofs over shops and units are easy to forget until water comes through a ceiling.
New Cross is about 3 miles south-east of London, in Greater London. From houses to flats and shops in New Cross, we can survey the roof on a weekday or at the weekend. New Cross is one of the places in Greater London we cover for electronic leak detection.
Electronic leak detection in SE8, SE14 and SE4 work the same way as everywhere else we cover. You’ll find streets such as Ivy Road, Mona Road and Avon Road, all of which we cover. Main roads around New Cross include the A2209 and A2210, which makes travel easy. Nearby, we also carry out electronic leak detection in St Johns (1 mile east), Telegraph Hill (1 mile south-west), Deptford (1 mile north-east), Nunhead (1 mile south-west) and Lewisham (1 mile south-east). Larger places within reach include London (3 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (8 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north-west).
What’s near New Cross
We work in homes and buildings around Wickham Arms, Fordham Park and Addey and Stanhope School, among other places. Nearby too are St. Paul's (0.7 miles north-east) and Laban Centre (0.9 miles north-east). There is a railway station in New Cross itself: New Cross station. Well-known places in the area include Fan Museum (1.2 miles north-east) and Greenwich Castle (1.5 miles east). Green spaces nearby include St. James's Park Lake and Tower Hill.
Your questions about electronic leak detection in New Cross
Is my home in New Cross listed or in a conservation area?
Your council is the best source, with Historic England’s list for listed buildings. A change of roofing material may need consent in either case.
Is parking a problem for a survey in New Cross?
Parking in New Cross, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Will you go up on the roof?
Only if it’s safe. We check everything that can safely be seen: from the ground, from windows, from inside the roof space, from the roof where it is safe and by drone where applicable. The report says if anything couldn’t be seen.
Can you test a green or ballasted roof?
On some roofs, yes. Covered roofs limit the methods we can use, so we check the build-up first.
What’s in the survey report?
It sets out what we found, why it matters and what we recommend, backed by photographs. It also says if any part of the roof couldn’t be seen safely, so you know exactly what was covered.
What’s the best way to book?
The quickest way is to phone 07833 053749 or send us an email. Tell us the address and a little about the roof, and we’ll take it from there. We survey on any day of the week.
Do I have to be there for the survey?
That depends on the survey. For inside areas and the loft space, someone has to give us access, while outside access can be discussed when you book.