Greater London · London and the South East
Electronic Leak Detection in Underhill
Get a clear view of the flat roof membrane at a property in Underhill. We visit on weekdays and at weekends.
- Stains far from any visible defect
- Leaking laps in the waterproofing
- Waterproofing to test before it is covered
Electronic leak detection for homes and businesses in Underhill
A leak in a flat roof frequently shows up a long way from where the water gets in. So the stain inside rarely sits under the hole. Electronic leak detection tests the membrane itself, to find where it has been breached. We test and report and leave the repair to your roofer. On a suitable roof, it takes the guesswork out of finding the hole. The results then follow in a written report with photos. If you’ve noticed punctures from foot traffic or tools and repairs that haven’t stopped the leak, we can find out what’s behind it.
On a London roof terrace or a flat roof over a back addition, water frequently runs under the covering before it shows. Upstands against parapets, outlets and the edge where flat meets pitched are common entry points. In a converted house in Underhill, the roof above may belong to the building rather than one flat.
Pictures do a lot of the work in our reports, so you can see each defect rather than just read about it. If something couldn’t be seen safely, the report is clear about it.
- Place
- Underhill (EN5, N20)
- Wider area
- Greater London
- Price
- Quoted for your roof
- Report
- Emailed report with photos and recommendations
- When we survey
- Weekdays and weekends
- Insured
- PI and public liability insurance
- Call
- 07833 053749
- Last updated
- 27 October 2026
Questions from Underhill
Is my home in Underhill listed or in a conservation area?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it is 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 Underhill?
Yes. We survey roofs across London and the South East, and Underhill is part of that. Just call 07833 053749 or send us an email and let us know about the property.
How does ELD work?
It uses an electrical current to find breaches in a flat roof membrane. The current only gets through where the membrane is breached so we can pinpoint it.
How do I book a survey in Underhill?
The quickest way is to ring 07833 053749 or drop us an email. Give us the address and some details about the roof, and we’ll take it from there. We survey seven days a week.
What does the report include?
You get our findings in writing, part by part, with photos, and ends with what we recommend. Points are put by urgency where it matters.
Do I have to be there for the survey?
If the survey includes the loft or the inside of the building, someone needs to let us in. Access is agreed with you when booking.
Do you survey roofs on blocks of flats?
Yes. Shared roofs just need a little more planning, with the building owner or managing agent. Mention it when you get in touch and we’ll explain what’s needed.
Different roofs, different checks
Bituminous membranes
ELD is frequently possible on bituminous membranes, depending on what’s below.
Inverted and paved roofs
If the build-up rules out ELD, we will say so.
Why it’s worth a survey now in Underhill
Chasing a leak again and again is frustrating. A report showing the breach points gives your roofer a clear target. Blocked gutters and hoppers on London houses overflow and soak brickwork. A small blockage left for a few winters becomes a damp problem.
The cost of a survey depends on the roof: its size, its height, how many sections it has and how it can be reached and seen safely. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Why us?
- Insured for professional indemnity and public liability
- Drones and thermal imaging where it applies
- An independent view of the roof
- Photographs and a written report every time
Take a look at how roof surveys are priced or our case studies.
What affects the price in Underhill
Prices always include VAT. The things that change the price are:
- Commercial roofs and larger buildings
- The size of the roof
- How tall the building is and how easy the roof is to see
- Extra roofs, like extensions, dormers or garages
For a price for your roof in Underhill, ring 07833 053749 or use the contact form and let us know about the roof. The price is agreed before a date is set.
What to tell us when you contact us
When you call or email, these details help:
- Access details, like a loft hatch or a shared roof
- Any marks or damp showing indoors
- What’s prompted the survey
- When you need the report by
Getting a price is simple: just phone 07833 053749 or drop us an email, let us know about the property and we’ll explain which survey suits. We confirm the price before anything is booked.
Also near Underhill
More services for Underhill
What we do, step by step
Where it is relevant and can be reached safely, the roof space is checked as well as the outside. Inside, we look for staining, damp, gaps and signs of movement, as far as the space allows. The whole visit normally takes a length of time set by the roof’s area and construction, and we’ll give you a guide when quoting. 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. If the building has a managing agent or access rules, let us know when booking.
- First, we confirm which roof areas are included.
- The surface is prepared for the chosen method.
- Testing runs across the agreed area.
- We mark the breach locations in our records.
- You receive the results to pass to your roofer.
Before the survey
- Jot down any questions you want answered
- Keep pets out of the way during the survey
- Have keys ready for side gates, garages or roof access doors
Book a survey
If you’re buying, it helps to book soon after your offer is accepted, so you have the findings in time to act on them before you exchange. Otherwise, simply ring 07833 053749 or send us an email whenever suits you.
Related advice
Do you need electronic leak detection in Underhill?
If a flat roof keeps leaking after patching, the hole may be elsewhere. ELD can locate the breach more precisely.
We’re frequently asked to look at:
- New membranes needing a check before handover
- Repairs that haven’t stopped the leak
- Damp inside with no sign on the roof
- Leaks at pipes, outlets or fixings
Take an older house close to St John the Baptist Church: later flat-roofed additions are common on older houses, and their edges and upstands often show the first signs of wear.
What to check before booking
- When you will get the report
- How long they’ve been surveying roofs
- How they plan to inspect the roof safely
- Their insurance cover
Can I check my roof myself?
The one thing to avoid is getting up close. Roofs are fragile and slippery, and a fall can be serious. That part is for a survey, using safe viewpoints and a drone where applicable.
After heavy rain, check ceilings and the tops of walls for new stains. Photograph them and note the date.
Electronic leak detection in Underhill: local notes
Outer London has lots of Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, frequently with hipped roofs in clay or concrete tiles. If your home in Underhill is one of them, bay roofs, hips and later dormers each have their own details. Next to the main roofs there is normally a flat roof somewhere, whether on an extension, a garage or a commercial unit. About 3.4 miles north lies Wyllyotts Manor, a reminder of how long the area around Underhill has been built on. 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.
Landlords with a home close to New Barnet station may find that flat roofs over rear additions and dormers in rented property are worth checking between tenancies. For a London address like Underhill, it’s useful to know about controlled parking before the day.
Underhill is about 1 mile west of Barnet, in Greater London. We carry out electronic leak detection in Underhill for houses, flats, blocks and commercial buildings. Underhill is one of the towns and villages in Greater London we cover for electronic leak detection. For surveys nearby, see our London page.
Electronic leak detection in EN5 and N20 work the same way as everywhere else we cover. Whether your property is on Park Road, May's Lane and Manor Road or a nearby road, we can help. Neighbouring places we cover for electronic leak detection include Barnet (1 mile east), New Barnet (1 mile east), Monken Hadley (1 mile north), Hadley Wood (1 mile north-east) and Cockfosters (2 miles east). Within a short drive, we also cover London (11 miles south-east), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (9 miles south) and Shoreditch (10 miles south-east).
What’s near Underhill
We work in homes and buildings around Susi Earnshaw Theatre School, Highlands Gardens and The Red Lion pub, among other places. The nearest railway station is New Barnet station, about 1 mile east of the centre. Well-known places in the area include Francis Skaryna Belarusian Library and Museum (2.2 miles south) and Barnet General Hospital (0.9 miles west). For a walk, there’s Greenhill Gardens and Darland's Lake.