Greater London · London and the South East
Electronic Leak Detection in Anerley
Electronic leak detection to pinpoint holes in flat roof membranes around Anerley, with a written report you can act on. Book a weekday or weekend visit.
- Leaks showing away from the breach
- Repairs that haven’t stopped the leak
- Breaches around outlets and penetrations
Electronic leak detection in Anerley
ELD can be carried out in more than one way. Low-voltage methods typically need a wet roof surface, while high-voltage testing needs a dry, exposed membrane. Which one suits depends on the membrane and the layers of the roof, and we will explain our choice. We’ll say if your roof doesn’t suit either method before any testing starts. Common reasons to book are leaking laps in the waterproofing and leaks that return after repairs, on single-ply roofs, liquid-applied waterproofing and green roofs.
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 block or conversion in Anerley, the flat roof is frequently a shared part of the building.
The report records the flat roof membrane as we found it on the day. That makes it useful now and a handy reference later.
- Where
- Anerley (SE20, SE19, SE26)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- Appointments
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
How we price electronic leak detection
To price your survey, we check:
- The roof’s overall size
- Height and safe access
- Extensions, dormers and garages with roofs of their own
- How complicated the roof is, with its valleys, chimneys and parapets
For a price for your roof in Anerley, phone 07833 053749 or send us an email with the address and some details. The price is agreed before a date is set.
What we need to know
Getting the details right at the start saves time. It helps to include:
- Pictures from the garden or a window, if you have them
- Where any leaks, stains or damp patches show inside
- When you need the report by
- Where the property is, with the postcode
If you have photos of the roof, send them over. Pictures from the ground or a window are fine. To get started, call 07833 053749 or drop us an email.
Towns and villages near Anerley
What else we do in Anerley
Common questions in Anerley
How do I find out if my home in Anerley is listed?
For listing, use Historic England’s list; for conservation areas, ask the council. The answer matters most when a change of material is on the cards.
Is Anerley in the area you cover?
Yes, Anerley is one of the places we work. Every survey there gets the same written report with photos.
Do you use drones?
Yes, where it’s applicable. Our sub-250g drone is flown by a CAA-registered operator with a Flyer ID and Operator ID, and the airspace and weather are checked before every flight.
Is it the same as a RICS Level 2 or Level 3 survey?
No. We look at the roof, not the whole building, and it is not a RICS Level 2 or Level 3 survey. It can sit alongside a RICS survey if you want both.
Can you tell me if my roof has asbestos?
No. We can flag materials that might contain asbestos, but only a specialist asbestos surveyor can confirm it. It may be present in buildings built or refurbished before 2000.
Do you look in the roof space?
Usually, if there’s one and it can be reached safely. From inside, the underside of the roof frequently shows damp, staining or daylight that can’t be seen from outside.
Are you structural engineers?
No. We’re experienced roof surveyors, and visible signs like sagging are noted, but we do not provide calculations or an engineer’s opinion. The report will say if you need an engineer.
What we can’t see
This is not a RICS building survey, a structural engineer’s report or an asbestos survey. It also has these limits:
- Moisture spread under the membrane
- Fixing the holes we find
- Leaks from walls, copings or rooflights
Not sure which survey suits your roof? You can phone 07833 053749 or email us and we’ll tell you before booking. The full list of what we check.
Roofs we survey in Anerley
- Single-ply roofs
- Commercial flat roofs
- Flat roof membranes
- Liquid-applied waterproofing
- Green roofs
- Roof terraces and balconies
How the survey changes by roof type
Single-ply membranes
Single-ply membranes are common on commercial and newer roofs. Laps and fixings are where holes frequently appear.
Liquid-applied waterproofing
Small holes in liquid waterproofing may leak. ELD can help locate them on suitable roofs.
How the survey works
Every visit follows the same pattern: we hear what you’ve seen, look at the roof from every safe viewpoint, photograph what we find and record our findings for the written report. It typically takes longer on a large roof than a small one, with the construction of the roof playing a part too. Many London properties are flats or terraces with no side access, so rear slopes are viewed from windows, the loft or, where a flight is allowed, by drone. Mention any building rules, key holders or managing agents as you book.
- We agree the area to be tested.
- The surface is prepared for the chosen method.
- Testing runs across the agreed area.
- Each breach found is located and recorded.
- You receive the results to pass to your roofer.
Preparing for the visit
- Keep pets in another room
- Clear the way to the loft hatch
- Dig out any old roof reports or invoices
Getting a price
Getting a price is simple: just call 07833 053749 or drop us an email, tell us about the property and we’ll suggest the right survey. The price is agreed up front.
Related advice
What electronic leak detection looks like in Anerley
Kingswood House, about 1.3 miles north-west, is one of the historic houses in the wider area around Anerley. If your home is one of the older ones, expect a mix of original materials and later repairs on the roof, and any change of roofing material on a listed home needs checking with the council first. Inner London’s Victorian and Edwardian terraces often have Welsh slate roofs. Many have butterfly roofs draining to a central valley gutter, with parapet walls and gutters hidden behind them. Lead flashings, party-wall upstands and shared chimney stacks are typical of these houses, if yours is one of them. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere.
Controlled parking zones are common in London, so mention any permit rules for Anerley. For site and facilities teams at buildings such as James Dixon Primary School, ponding and blocked outlets on a wide flat roof are worth catching before the next wet season. Landlords with a home close to Anerley station may find that a flat roof over a rented flat is easy to forget until the tenant reports a leak.
Anerley is about 2 miles north-east of Thornton Heath, in Greater London. Wherever you are in Anerley, we can carry out electronic leak detection at your property, on a weekday, Saturday or Sunday. Our area takes in places right across Greater London, from the larger towns to small villages. You can also see our page for London.
Every address in SE20, SE19 and SE26 is within our area for electronic leak detection, from the main roads to the quietest streets. Whether your property is on Maple Road, Padua Road and Genoa Road or a nearby road, we can help. Neighbouring places we cover for electronic leak detection include Penge (1 mile east), Crystal Palace (1 mile north), Sydenham (1 mile north-east), Gipsy Hill (1 mile north-west) and Upper Norwood (1 mile west). Larger places within reach include London (6 miles north), City of Westminster (8 miles north-west), Marylebone (8 miles north-west), Kensington (8 miles north-west), St Pancras (8 miles north) and Shoreditch (8 miles north).
Near you in Anerley
Locally, jobs take us to homes and businesses close to Crystal Palace School, Crystal Palace Dinosaurs and Harris City Academy Crystal Palace, among other places. There is a railway station in Anerley itself: Anerley station. Well-known places in the area include Crystal Palace Museum (0.5 miles north-west) and Whitgift Centre (3.1 miles south-west). Not far away are Dulwich Upper Wood and Knight's Hill.
What happens if roof problems are left?
Some breaches are too small to see. Electronic testing can find breaches you can’t see by eye, on suitable membranes. In a London terrace or conversion, a roof defect rarely stays your problem alone: failed flashings and blocked valley gutters can send water into more than one home. Finding it early keeps the work smaller.
Bigger, taller and commercial roofs take more time to survey, so they’re priced to match. You will know the figure before booking.
Why book with us
- 20+ years’ experience
- 5,000+ surveys completed
- We hold a CAA Flyer ID and Operator ID
- Every finding written up with photos
See how roof surveys are priced and what we found on two real jobs.
Should I look at the roof myself first?
What you can’t do safely is get up close. Slates, tiles, flat roofs and rooflights can give way, and falls from height are serious. That is where a survey comes in.
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.