Greater London · London and the South East
Electronic Leak Detection in Blendon
Not sure what state the flat roof membrane is in? We carry out electronic leak detection in Blendon and across Greater London.
- Leaks through a flat roof with no obvious cause
- Failed seams and laps
- New roofs to check before paving or planting
Your questions about electronic leak detection in Blendon
How do I find out if my home in Blendon is listed?
Start with Historic England’s list for listing and your council for conservation areas. Either can affect what roof work is allowed, so it’s worth checking before planning any.
Can parking be tricky for a visit in Blendon?
It depends on the street. Where there are permit zones, a visitor permit or nearby pay-and-display bay works well.
What insurance do you have?
We’re covered by professional indemnity and public liability insurance, for every survey we carry out.
Does ELD include fixing the breach?
No. ELD is testing only. The report shows where each breach is for your roofer to repair.
What’s the best way to book?
It is easiest to ring 07833 053749 or email us. Let us know the address and a little about the roof, and we’ll take it from there. We survey seven days a week.
How long will testing take?
It usually takes a length of time set by the size of the roof and how it’s built, which we’ll explain when we quote.
How long have you been surveying roofs?
More than 5,000 surveys over 20+ years.
How electronic leak detection works in Blendon
ELD can be carried out in more than one way. Low-voltage methods typically need a wet roof surface and high-voltage methods need the membrane dry and exposed. The right method depends on the membrane and the build-up of the roof and we explain which we will use. We’ll say if your roof doesn’t suit either method before any testing starts. We survey commercial flat roofs, single-ply roofs and green roofs, and people most often book us about water coming in under a flat roof and new membranes needing a check before handover.
Across London, flat roofs are everywhere, from back additions and dormers to roof terraces, blocks of flats and offices. They’re covered in felt, asphalt, EPDM rubber, GRP fibreglass or single-ply membranes, each with its own weak points. Which one is on a roof in Blendon shapes how it’s checked. Older flat roofs are often felt or asphalt, newer ones rubber or GRP.
The report works through the roof section by section, from the coverings down to the gutters. It records what’s sound as well as what is not.
- Place
- Blendon (DA5, DA15, DA6)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Reports
- A written report with photos, by email
- Appointments
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Useful tips for Blendon property owners
Getting the most from electronic leak detection starts before we arrive and carries on afterwards. Tips:
- Use boards when working on the roof
- Test new membranes before covering them
- Keep a note of leaks after rain
- Have roof specifications to hand
You receive a report showing where each breach was found, with photographs. Your roofer uses it to carry out repairs.
Keep outlets and gutters on flat roofs clear. Standing water puts more pressure on any weak point.
What this survey cannot tell you
A survey is a close look at the flat roof membrane, but it can’t do everything. Its limits include:
- Sections we cannot safely access
- Water entering through details rather than the membrane
- Carrying out the repair work
Not sure which survey suits your roof? You can call 07833 053749 or send us an email and we’ll tell you. What our survey covers.
Roofs we survey in Blendon
- Roof terraces and balconies
- Liquid-applied waterproofing
- Commercial flat roofs
- Flat roof membranes
- Single-ply roofs
- Green roofs
What we do, step by step
We’ll ask a few questions first, like when any problem began and what work has been done before. Then the inspection itself takes a length of time set by the membrane area and the build-up, which we’ll explain when we quote. In Blendon, as in much of London, lots of properties are flats or terraces without side access, so the back of the roof is often seen from upstairs windows, from inside or, where a flight is allowed, from the air. Mention any building rules, key holders or managing agents as you book.
- We start with what you know about the roof and the leak.
- The roof is assessed for suitability first.
- We choose a low-voltage or high-voltage method to match the roof.
- We test the roof and locate any breaches.
- You get a report with photos of each breach.
Before we arrive
- Clear the way to the loft hatch
- Have keys ready for side gates, garages or roof access doors
- Keep pets out of the way during the survey
Booking a survey
Buyers should book once an offer has been accepted, so you have the findings in time to act on them before you exchange. Otherwise, simply ring 07833 053749 or drop us an email whenever suits you.
Advice
Why it’s worth a survey now in Blendon
Chasing a leak again and again is frustrating. A report showing the breach points gives your roofer a clear target. Many older London roofs have only old felt under the slates, or no underlay at all, so a slipped slate can soon mean water inside. Left unchecked, water soaks into timber and plaster and the damage spreads.
To find out what your survey will cost, ring 07833 053749 or send us an email and let us know about the roof. We’ll confirm the figure before booking.
Why book us in Blendon
- A sub-250g drone, flown with a CAA Flyer ID and Operator ID
- More than 5,000 surveys completed
- Independent findings on the roof’s condition
- 20+ years’ experience
See our cost guide or our case studies.
Landlords, agents and block managers in Blendon
An agent can book and manage the survey for a landlord. We agree a time with the tenant beforehand.
Landlords and agents in Blendon book surveys as well as householders. A written report with photographs gives you a clear record of the flat roof membrane.
Electronic leak detection around Blendon
Within a mile and a half or so of Blendon there are several hotels, and hotels, like offices and blocks of flats, frequently have flat roofs. If you look after one, a leak through a flat roof can put a room out of use. With Danson House about 0.7 miles north, Blendon sits in an area with a long building history. 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.
If you run a hotel or guest house in or near Blendon, a roof problem can mean rooms out of use. Landlords with a home close to Albany Park station may find that flat roofs over rear additions and dormers in rented property are worth checking between tenancies. For businesses in and around places like Broadway Shopping Centre, flat roofs over shops and units are easy to forget until water comes through a ceiling.
Blendon is about 1 mile south-east of Welling, in Greater London. We carry out electronic leak detection in Blendon for houses, flats, blocks and commercial buildings, with a written report and photographs every time. Our Greater London coverage includes Blendon and the places around it. Our London page covers surveys nearby.
All of DA5, DA15 and DA6 is within our area for electronic leak detection, from the main roads to the quietest streets. That includes homes and businesses on Penn Lane, Hurst Road and Brook Lane and the roads around them. Blendon is on the A221, so it is easy for us to get to. If you are just outside Blendon, we cover Bexley (1 mile south-east), Crook Log (1 mile north), Welling (1 mile north-west), Upton (1 mile north-east) and Bexleyheath (1 mile north-east). Larger places within reach include London (10 miles west), City of Westminster (13 miles west), Marylebone (13 miles north-west), Kensington (14 miles west), St Pancras (12 miles north-west) and Shoreditch (10 miles north-west).
Near you in Blendon
Around Blendon, our work takes us to homes and buildings near Danson Park, The Royal Oak Public House and Hurst Primary School and the streets around them. The nearest railway station is Albany Park station, about 0.8 miles south of the centre. Other landmarks nearby include Metropolitan Police Museum (1.3 miles south-west) and Bexley Hospital (0.8 miles north-east). The countryside around Blendon includes Wansunt Pit and Summer Hill.
Also in Blendon
Different roofs, different checks
Liquid-applied waterproofing
What lies under a liquid coating decides if ELD will work.
EPDM rubber roofs
Whether an EPDM roof can be tested depends on the membrane and build-up. We check before we quote.