Greater London · London and the South East
Fortis Green Electronic Leak Detection
Electronic leak detection in Fortis Green from an independent, experienced roof surveyor. Over 5,000 surveys and 20+ years behind us.
- Leaks at pipes, outlets or fixings
- Damp inside with no sign on the roof
- Leaking laps in the waterproofing
Tips from our surveys
Small things make a difference, both for the survey and for the roof itself. Some pointers:
- Don’t leave water getting in
- Keep foot traffic on flat roofs to a minimum
- Use boards when working on the roof
- Share any drawings of the roof
File the report with your roof paperwork. It is a dated record of the membrane’s condition.
ELD before paving, ballast or planting goes on is worth considering. Finding breaches is simpler at that stage.
About our electronic leak detection in Fortis Green
Our ELD report shows where each breach was found with photos. Your roofer can then repair those points rather than guessing. We do not estimate repair costs, so your roofer prices the work. A retest after repairs can check the work if the build-up allows. Results come in a written report with photos. If you’ve noticed waterproofing to test before it’s covered and leaks under green or ballasted roofs, a survey will tell you what’s going on.
Offices, shops and blocks of flats across London frequently have large flat roofs with plant, rooflights and walkways. Each pipe, upstand and fixing through the covering is a possible weak point. In Fortis Green, roof access is agreed with the building manager or owner beforehand. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
You can share the report with anyone who needs it: your solicitor, the seller, your insurer, a roofer or the building’s managing agent.
- Where
- Fortis Green (N10, N2, N6)
- Wider area
- Greater London
- Price
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- Appointments
- Monday to Sunday, daytime
- Cover
- PI and public liability insurance
- Phone
- 07833 053749
- Last updated
- 27 October 2026
What electronic leak detection looks like in Fortis Green
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. Hips, bay roofs and later loft conversions are typical of those semis, if your home is one of them. Mixed in with those pitched roofs are plenty of flat ones, over rear extensions, dormers, garages and shops. The wider area around Fortis Green has a long history of building, with Heath Hall about 1.4 miles south-west. On older houses around here, roofs frequently carry the marks of earlier repairs, from replaced slates to new lead.
If you look after a shop, office or commercial unit, for instance near Grand Arcade, outlets and upstands on commercial flat roofs are the places to check before trouble starts. If you let a flat or house near Alexandra Palace station, the flat roof over a let home is worth a look before it becomes a tenant complaint.
Fortis Green is about 1 mile south-east of Finchley, in Greater London. We visit Fortis Green as part of our work across Greater London, for houses, flats and commercial buildings. We cover towns and villages across Greater London. There is also a page for London.
Here we cover the N10, N2 and N6 postcode area for electronic leak detection. We cover properties on Hill Road, Durham Road and Steeds Road. With the A504 close by, Fortis Green is simple for us to get to. If you’re just outside Fortis Green, we cover Muswell Hill (1 mile east), East Finchley (1 mile west), Highgate (1 mile south), Crouch End (1 mile south-east) and Hampstead Garden Suburb (2 miles south-west). Larger places within reach include London (7 miles south), City of Westminster (5 miles south), Marylebone (5 miles south), Kensington (7 miles south), St Pancras (5 miles south) and Shoreditch (6 miles south-east).
What’s near Fortis Green
Around Fortis Green, our work takes us to homes and buildings near Tollington School, Cherry Tree Wood and The Clissold Arms and the streets around them. The nearest railway station is Alexandra Palace station, about 1.4 miles east. A little further out are Kenwood House (1.6 miles south-west) and Grand Arcade (1.8 miles north-west). Green spaces nearby include Highgate Hill and Glebelands Local Nature Reserve.
For landlords and managing agents
We survey roofs for landlords and letting agents as well as homeowners. The report gives you a dated record of the flat roof membrane, with photos, which helps you plan work between tenancies.
For a freeholder or residents’ company, a roof report is a sound basis for a maintenance plan, putting the urgent items at the top.
Towns and villages near Fortis Green
More services for Fortis Green
When to book a survey in Fortis Green
Water travels under flat roof membranes. The stain inside can be far from the hole which makes it hard to find by looking.
Common reasons to book include:
- Stains far from any visible defect
- Breaches hidden under paving or planting
- Leaks that return after repairs
- Punctures from foot traffic or tools
For a London address like Fortis Green, it’s useful to know about controlled parking before the day, along with any off-street space.
Before you book any roof surveyor
- How they’ll see the roof: from the ground, the loft, the roof or by drone
- What the report includes, and whether it has photographs
- Is there a chance to talk the report through?
- Is VAT included in the price?
What we do, step by step
On the day, we begin with a quick chat about the roof and anything that’s worrying you. After that, we look at everything we can see safely, using the ground, windows, the loft and a drone where it applies. The survey normally takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. In Fortis Green, as in much of London, a good many properties are flats or terraces without side access, so the back of the roof is frequently 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.
- First, you tell us about the roof build-up and where water is showing.
- The roof is assessed to see if electronic testing will work on it.
- The testing method is chosen to suit the membrane and build-up.
- The roof is tested and any breaches are located.
- We send a report with photos of each breach so your roofer can repair it.
Preparing for the visit
- If the roof is shared, arrange access with whoever manages the building
- Gather any invoices or paperwork from past roof work
- Check the loft hatch can be reached
Booking a survey
We confirm the exact price before you book, so you know the cost up front. Electronic leak detection is quoted for your roof, because the method depends on the roof. For a price for your roof, phone 07833 053749 or email us.
Related advice
Honest limits
Every survey has limits, and it is better to know them up front. Keep these in mind:
- Carrying out the repair work
- How wet the insulation is
- Parts of the roof covered by fixed equipment
Not sure which survey suits your roof? You can phone 07833 053749 or send us an email and we’ll tell you before you book. The full list of what we check.
What this survey covers
- Green roofs
- Liquid-applied waterproofing
- Commercial flat roofs
- Roof terraces and balconies
- Flat roof membranes
- Single-ply roofs
Roof by roof
Bituminous membranes
ELD is often possible on bituminous membranes though the layers below matter.
Green and ballasted roofs
Roofs with planting or ballast hide the membrane. Some methods can work through these layers but it depends on the layers.
Fortis Green: your questions answered
Do you cover Fortis Green?
Yes, Fortis Green is one of the places we work. The survey and report are the same in Fortis Green as anywhere else, and visits run on weekdays and weekends.
How do I find out if my home in Fortis Green is listed?
Historic England’s list shows listed buildings, and the local council can tell you about conservation areas. If a home is listed, changes that affect its special interest need listed building consent, and in a conservation area re-roofing in different materials may need permission.
What’s the best way to book?
To book, ring 07833 053749 or send us an email and tell us the address and what you need to know. We’ll confirm the price and agree a day with you.
Do I need to be at home?
Not always. An outside-only look can be arranged beforehand, but anything inside needs someone there to give access.
How do you choose the testing method?
We choose the method that suits the roof. You will know which method we plan to use before we start.
Can you inspect my roof with a drone?
Where it helps and it is safe, yes. Whether we can fly on the day depends on the weather and the airspace rules. We are a CAA-registered drone operator.
Is this an asbestos survey?
No. We don’t carry out asbestos surveys or testing. If we see materials that could contain asbestos, like cement roof sheets or soffits on buildings from before 2000, we flag them.