Greater London · London and the South East
Electronic Leak Detection in Friern Barnet
Know where you stand with the flat roof membrane before you decide what to do next. We carry out electronic leak detection in Friern Barnet, with photos and a clear written report.
- Stains far from any visible defect
- Holes around roof penetrations
- A flat roof leak that cannot be traced
How electronic leak detection works in Friern Barnet
Roofs covered with paving, ballast or planting need more thought. What sits on the membrane can affect which method will work, and some may need lifting. We talk this through before we quote. Drawings or details of the roof’s layers are useful, as they show what lies beneath the surface. If testing isn’t possible, we’ll say so. We survey green roofs, single-ply roofs and commercial flat roofs, and common reasons people get in touch are breaches around outlets and penetrations and new roofs to check before paving or planting.
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 Friern Barnet, the flat roof is frequently a shared part of the building.
After the visit, you get a written report with photos, sent by email. It sets out the condition of the flat roof membrane, any defects and our written recommendations.
- Place
- Friern Barnet (N11, N12, N10, N20)
- Region
- Greater London
- Cost
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Insurance
- PI and public liability insurance
- Call
- 07833 053749
- Last updated
- 27 October 2026
What affects the price in Friern Barnet
Several things affect the price of a survey:
- The number of roofs, including extensions and garages
- Whether it’s a home or a commercial building
- Roof area
- The use of thermal imaging or a drone
For a price for your roof in Friern Barnet, phone 07833 053749 or use the contact form and let us know about the roof. We will confirm the figure before booking.
Booking your survey
If you can, have these to hand when you contact us:
- Anything about access we should know
- Where the property is, with the postcode
- Pictures of the roof from a safe spot, if you have them
- The style of property, from a terrace to a block
To get a price for electronic leak detection in Friern Barnet, phone 07833 053749 or use the contact form. A few details about the property and the roof help us give you an accurate price.
Also near Friern Barnet
What else we do in Friern Barnet
Rented homes, blocks and businesses
If the property is let, the agent or a tenant can let us in, at a time agreed beforehand. We survey on weekdays and at weekends, which helps when tenants work during the week.
Landlords and agents in Friern Barnet book surveys as well as homeowners. A written report with photos gives you a clear record of the flat roof membrane, useful for planning maintenance.
Honest limits
Our findings are based on what we can see safely on the day, so some things are outside what a survey can do:
- Build-ups without a suitable layer below
- Leaks from walls, copings or rooflights
- Parts of the roof covered by fixed equipment
If in doubt, phone 07833 053749 or drop us an email and we will recommend the right survey. What our survey covers.
Roofs we survey in Friern Barnet
- Roof terraces and balconies
- Flat roof membranes
- Single-ply roofs
- Commercial flat roofs
- Liquid-applied waterproofing
- Green roofs
Before and after the survey
A few practical points come up again and again on our surveys. They apply to most roofs:
- Limit access to the roof
- Have roof specifications to hand
- Ask contractors to protect the membrane
- Find the breach before more patching
Wet insulation may need attention after a leak. That is something to discuss with your roofer and other checks can help judge it.
Act on leaks quickly. Water under a membrane can spread.
What we do, step by step
The visit has one job: to see as much of the flat roof membrane as can be seen safely and record it clearly. Everything we note and photograph goes into the written report. It usually takes more time on a big roof than a small one, with the construction of the roof playing a part too. In a London conversion, the way into the loft space is frequently from a communal landing or the top flat. If that applies to your building, it is useful to agree access with the neighbours or the managing agent first. Everything else is planned around the building, not the postcode.
- You tell us about the roof and where water is showing.
- We check whether the membrane and build-up suit ELD.
- The test method is chosen to suit the roof.
- The membrane is tested and breaches are found.
- A report with photos shows where each breach is.
Getting ready for the survey
- Leave a clear route to the loft
- Agree roof access with the managing agent if it’s shared
- Show us where any leaks or stains appear
How to book
Most bookings start with a short call: ring 07833 053749 or use the contact form. The price is agreed before a date is set.
Related advice
Common questions in Friern Barnet
Does a conservation area affect roof work in Friern Barnet?
The council and Historic England’s list are the places to check. Either can affect what roof work is allowed, so it is worth checking before planning any.
Will parking be an issue for a roof survey in Friern Barnet?
It rarely stops a survey, but it is worth planning. Tell us what parking is available nearby, and the visit is planned around it.
How much time does ELD need?
It usually takes a length of time set by the membrane area and the build-up, and we’ll give you a guide when quoting.
What will the report tell me?
It explains what we saw, what it means and what we’d suggest, with photographs throughout. It also says if any part of the roof couldn’t be seen safely, so you know exactly what was covered.
Do I have to be there for the survey?
Someone needs to let us in if we are looking inside or in the loft. Access is agreed with you when you book.
Can you survey a shared roof?
Yes. A shared roof needs access agreed first. Tell us about it when booking and we will plan the survey around it.
Will I get photos?
Yes. We photograph the roof as we go, and the report uses them to show each finding alongside our recommendations.
Leave it or get it looked at?
A visual inspection can miss tiny holes. ELD picks up breaches a visual check might miss where the roof suits it. In Friern Barnet, as in much of London, water from a roof defect can reach a neighbour’s home as easily as yours: failed flashings and blocked valley gutters can send water into more than one home. Finding it early keeps the work smaller.
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. You’ll know the figure before booking.
Why book with us
- Satisfaction rate of 98%
- Drone and thermal imaging surveys available
- 5,000+ surveys completed
- PI and public liability insurance
Take a look at how roof surveys are priced or our case studies.
Electronic leak detection in Friern Barnet: local notes
Heath Hall, about 2.7 miles south, is one of the historic houses in the wider area around Friern Barnet. If you own one of the older houses, 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. Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, frequently with hipped roofs of clay or concrete tiles. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere.
If you live in an older home near St John's Church, later flat-roofed additions are common on older houses, and their edges and upstands often show the first signs of wear. Shop and office owners around Grand Arcade may find that flat roofs over shops and units are easy to forget until water comes through a ceiling. For a London address like Friern Barnet, it is useful to know about controlled parking before the day.
Friern Barnet is about 2 miles north-east of Finchley, in Greater London. Wherever you are in Friern Barnet, we can come and survey your property, on a weekday, Saturday or Sunday. Our area takes in places right across Greater London, from the larger towns to small villages. London is in our area too.
Every address in N11, N12, N10 and N20 is within our area for electronic leak detection. We offer electronic leak detection to properties on Martock Gardens, Shapwick Close and Radstock Close. Main roads around Friern Barnet include the A406 and B550, which makes travel easy. Close by, we survey roofs in New Southgate (1 mile east), Brunswick Park (1 mile north), North Finchley (1 mile west), Arnos Grove (1 mile east) and Whetstone (1 mile north-west). Larger places within reach include London (8 miles south), City of Westminster (7 miles south), Marylebone (7 miles south), Kensington (8 miles south), St Pancras (6 miles south) and Shoreditch (7 miles south-east).
Near you in Friern Barnet
In Friern Barnet, that means homes and buildings near Francis Skaryna Belarusian Library and Museum, Friary Park and Friern Barnet School. There’s a railway station in Friern Barnet itself: New Southgate station. Nearby you’ll also find Francis Skaryna Belarusian Library and Museum (1.4 miles west) and Grand Arcade (1 mile west). Not far away are Highgate Hill and Darland's Lake.