Greater London · London and the South East
Electronic Leak Detection in North Finchley
A careful look at the flat roof membrane at your property in North Finchley, and put it all in a written report with photographs.
- Holes left by work on the roof
- Leaks showing away from the breach
- A flat roof leak that can’t be traced
Prices for electronic leak detection in North Finchley
Prices always include VAT. What changes the price is:
- The size of the roof
- How tall the building is and how easy the roof is to see
- Any need for thermal images or a drone flight
- House, block, shop or office
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 exact price before booking.
What to let us know when you contact us
What helps most when you contact us:
- The property’s address and postcode
- Any deadline, such as an exchange date
- What kind of property and roof it is
- Photos of the roof, taken safely from the ground or a window
We confirm the price for your survey before booking, 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, phone 07833 053749 or drop us an email.
Electronic leak detection for homes and businesses in North Finchley
There are different ELD methods. Low-voltage methods typically need a wet roof surface, while high-voltage testing needs a dry, exposed membrane. The right method depends on the membrane and the build-up of the roof, and we’ll explain our choice. We’ll say if your roof does not suit either method before any testing starts. If you’ve noticed damp inside with no sign on the roof and new membranes needing a check before handover, a survey will tell you what’s going on, on flat roof membranes, commercial flat roofs and liquid-applied waterproofing alike.
Commercial and residential blocks across London frequently 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 North Finchley, access is agreed with whoever manages the roof before the visit. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
After the visit, you get a report with photographs, sent by email. It sets out the condition of the flat roof membrane, any defects and our written recommendations.
- Place
- North Finchley (N12, N20, N11)
- Wider area
- Greater London
- Prices
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- Survey days
- Weekdays, Saturdays and Sundays
- Insured
- PI and public liability insurance
- Phone
- 07833 053749
- Updated
- 27 October 2026
Can I check my roof myself?
A lot can be seen from ground level. With binoculars, look for slipped or missing slates and tiles, gaps along the ridge and leaning chimneys. Please don’t climb up for a closer look.
What you cannot do safely is get up close. Roofs are fragile and slippery, and falls from height are serious. That’s where a survey comes in.
Also near North Finchley
Other services in North Finchley
What we are asked to look at in North Finchley
Repeated leaks after repairs suggest the real breach hasn’t been found. Electronic testing helps pinpoint it.
Common reasons to book include:
- A flat roof leak that cannot be traced
- Stains far from any visible defect
- Gaps at membrane joints
- Breaches around outlets and penetrations
If your home is one of the older ones in the streets near St. Barnabas Church, the flat roofs on later extensions tend to wear out long before the main roof.
Before booking anyone
- Whether you can ask questions once you have the report
- Is VAT included in the price?
- How much experience they have with roofs like yours
- How soon the report will arrive
Honest limits
Our survey is not a RICS Level 2 or Level 3 survey, a structural engineer’s report or an asbestos survey. It also has these limits:
- Repairing the breaches (that is for your roofer)
- Build-ups without a suitable layer below
- Leaks from walls, copings or rooflights
Not sure which survey suits your roof? You can ring 07833 053749 or drop us an email and we will tell you. The full list of what we check.
Roofs we survey in North Finchley
- Flat roof membranes
- Single-ply roofs
- Liquid-applied waterproofing
- Green roofs
- Roof terraces and balconies
- Commercial flat roofs
Tips that help
Most of what helps is simple and safe from the ground. Our suggestions:
- Clear flat roof outlets regularly
- Don’t keep patching the same spot
- Keep foot traffic on flat roofs to a minimum
- Consider ELD before paving or planting goes on
Where the evidence points to walls, copings or rooflights, we will note it, with a suggestion of what to check next.
ELD before paving, ballast or planting goes on is worth considering. Finding breaches is simpler at that stage.
The survey, step by step
A survey visit follows a simple order: we listen to what’s been worrying you, inspect the roof from each safe vantage point, take photographs as we go and make notes for the report. It usually takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. For a visit in North Finchley, parking and access are the things to plan: let us know about permits, visitor bays or off-street space, which floor the property is on and how to get into the loft. On the day, the roof is looked at from ground level, from windows, from inside the loft space and from the roof where it’s safe.
- You tell us about the roof and where water is showing.
- The roof is assessed for suitability first.
- We choose a low-voltage or high-voltage method to match the roof.
- The membrane is tested and breaches are found.
- A report with photos shows where each breach is.
Before the survey
- Agree roof access with the managing agent if it is shared
- Let us know about parking before the day
- Gather any invoices or paperwork from past roof work
Getting a price
Surveys can be booked for weekdays, Saturdays or Sundays. To find a date that works for you, ring 07833 053749 or send us an email with the address and the days you’d prefer.
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Your questions about electronic leak detection in North Finchley
Does a conservation area affect roof work in North Finchley?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it’s in a conservation area. 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 cover North Finchley?
Yes. We cover the whole of London and South East England, and North Finchley is part of that. Just ring 07833 053749 or drop us an email and tell us about the property.
Can you survey a shared roof?
Yes, as long as access is agreed. The roof of a block or converted house is often shared, so we need permission from whoever owns or manages the building. We can only inspect what we are given access to.
What is electronic leak detection?
A sound membrane blocks the test current, but a hole lets it through. That is how we locate breaches you cannot see.
Can you inspect my roof with a drone?
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.
Can every flat roof be tested?
Not every roof is suitable. Certain membranes are conductive and some roofs lack the layer the test needs. We will tell you if yours is not suitable before testing.
How long will testing take?
It normally takes a time that depends on the size of the roof and how it’s built, which we set out in the quote.
What electronic leak detection looks like in North Finchley
The wider area around North Finchley has a long history of building, with Heath Hall about 2.9 miles south. On older houses around here, roofs frequently carry the marks of earlier repairs, from replaced slates to new lead. Outer London has a good many Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, frequently with hipped roofs in clay or concrete tiles. Hips, bay roofs and later loft conversions are typical of those semis, if your home is one of them. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere.
Parking in North Finchley, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day easier. Take a building like Sacks Morasha Jewish Primary School: schools and public buildings frequently have big flat roofs, and their outlets and upstands need regular checks.
North Finchley is about 1 mile north of Finchley, in Greater London. From houses to flats and shops in North Finchley, we can survey the roof. North Finchley is one of the towns and villages in Greater London we cover. We also survey roofs in London.
Every address in N12, N20 and N11 is covered for electronic leak detection. Local streets include High Road, Lodge Lane and Percy Road. North Finchley sits on or near the A1000, which makes travel easy. Nearby, we also carry out electronic leak detection in Woodside Park (1 mile west), Oakleigh Park (1 mile north), Whetstone (1 mile north), Friern Barnet (1 mile east) and Finchley (1 mile south). Within a short drive, we also cover London (9 miles south-east), City of Westminster (7 miles south), Marylebone (7 miles south), Kensington (8 miles south), St Pancras (7 miles south) and Shoreditch (8 miles south-east).
Local landmarks in North Finchley
We work in homes and buildings around Friary Park, Woodhouse College and The Bohemia pub, among other places. Also close by are Francis Skaryna Belarusian Library and Museum (0.5 miles west) and St Michael's Catholic Grammar School (under half a mile south-west). The closest station to North Finchley is New Southgate station, about 1.4 miles east of the centre. Well-known places in the area include Finchley Memorial Hospital (0.8 miles south) and Francis Skaryna Belarusian Library and Museum (0.5 miles west). The countryside around North Finchley includes Darland's Lake and Glebelands Local Nature Reserve.