Greater London · London and the South East
Electronic Leak Detection in Pentonville
We take a careful look at the flat roof membrane at your property in Pentonville, with photographs and a written report.
- Leaks at pipes, outlets or fixings
- Stains far from any visible defect
- Leaks under green or ballasted roofs
Rented homes, blocks and businesses
Where a roof is shared: access has to be agreed with whoever owns or manages the building. Tell us about it when you book and we will plan the survey around it.
Surveys can also be booked by buyers’ agents acting for a client. Reports are emailed, so they’re easy to pass on.
Electronic leak detection in Pentonville
Electronic leak detection works on many flat roof membranes over offices, units, blocks of flats and homes. It helps trace a leak you already have or check a new membrane before handover. We quote for each roof based on its size and build-up. Testing can be carried out on weekdays, Saturdays or Sundays when conditions allow. Just ask about your roof. If you’re worried about holes left by work on the roof and leaks that return after repairs, we can find out what’s behind it, whatever the roof.
Across London, flat roofs are everywhere, from back additions and dormers to roof terraces, blocks of flats and offices. They’re covered in felt, asphalt, EPDM rubber, GRP fibreglass or single-ply membranes, and each fails in its own way. Which one is on a roof in Pentonville shapes how it is checked. Many older flat roofs are felt or asphalt, and many newer ones EPDM rubber or GRP.
The report is written in plain words, so it makes sense without any roofing background. Each point is backed by a photograph where possible, with the urgent items made clear.
- Place
- Pentonville (N1, N1P, EC1V)
- Wider area
- Greater London
- Price
- Quoted for your roof
- Your report
- A written report with photos, by email
- When we survey
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
Electronic leak detection in Pentonville: local notes
About 1.4 miles south lies Dr Johnson's House, a reminder of how long the area around Pentonville has been built on. Older homes in the wider area frequently have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and the council can say whether a home is in a conservation area. Welsh slate on Victorian and Edwardian terraces is a familiar sight across inner London. From the street you may see only a parapet, with a butterfly roof and a valley gutter behind it draining to the back. Shared chimney stacks, party-wall upstands and lead work come with this kind of house. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere.
If you own a rental within reach of Essex Road station, flat roofs on let property tend to be checked only when they fail, which is the costly way round. Take an older house close to Church of Saint Peter: the joins between later flat roofs and the old walls are where problems typically start.
Pentonville is about 1 mile north-east of St Pancras, in Greater London. Surveys in Pentonville work the same way as everywhere we cover: a proper look at whatever is safely visible, photographs and a clear written report. Across Greater London, we cover Pentonville.
Surveys in N1, N1P and EC1V are booked the same way as anywhere else. Local streets include City Road, Noel Road and Dewey Road, and we cover them all. Main roads around Pentonville include the A1200. Close by, we survey roofs in Angel (1 mile south-west), Islington (1 mile north), Clerkenwell (1 mile south), Barnsbury (1 mile north-west) and St Pancras (1 mile south-west). Within a short drive, we also cover City of Westminster (3 miles south-west), Kensington (5 miles south-west), Walthamstow (5 miles north-east), Hampstead (4 miles west), Ruislip (13 miles west) and Brompton (4 miles south-west).
Around Pentonville
Typical jobs here are in homes near Islington Green School, The Camden Head Public House and Pilsudski Institute of London and the streets around them. Other local landmarks include City of London Academy Islington (within half a mile east) and Barnard Park (within half a mile west). The closest station to Pentonville is Essex Road station, roughly 0.5 miles north-east of the centre. A little further out are Museum of Funeral History (0.7 miles south-west) and Brunswick Centre (1.2 miles south-west). Green spaces nearby include Ludgate Hill and St. James's Park Lake.
Pentonville questions
Is my home in Pentonville listed or in a conservation area?
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.
Do you cover commercial flat roofs around Pentonville?
Yes, we cover commercial roofs as well as homes. Roof access is agreed with the building manager or owner beforehand.
Will you repair the leak?
No. We test the membrane and report. The report shows where each breach is for your roofer to repair.
Do you test for asbestos?
No. We do not carry out asbestos surveys or testing. We flag materials that could contain asbestos, such as cement sheets or soffits on pre-2000 buildings.
Is it the same as a RICS Level 2 or Level 3 survey?
No. This is a survey of the roof only, and it isn’t a RICS Level 2 or Level 3 survey. It can sit alongside a RICS survey if you want both.
What does electronic leak detection do?
A sound membrane blocks the test current, but a hole lets it through. That’s how we locate breaches you cannot see.
How many surveys have you done?
Over 20 years and more than 5,000 surveys.
What affects the cost of electronic leak detection
What a survey costs depends on the time and equipment it needs. That comes down to:
- If the survey needs thermal imaging or a drone
- The number of roofs, including extensions and garages
- The shape of the roof and its details
- Height and safe access
All our prices include VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. We confirm the price for your roof before booking.
What to let us know when you get in touch
A few details help us suggest the right survey and price. When you get in touch, it’s useful to mention:
- The address and postcode of the property
- The reason for the survey, like buying, a leak or storm damage
- Pictures from the garden or a window, if you have them
- When you need the report by
To arrange a survey, phone 07833 053749 or drop us an email and tell us the address and what’s prompted the survey. We’ll confirm the price before booking.
What we can’t see
Our survey is not a RICS Level 2 or Level 3 survey, a structural engineer’s report or an asbestos survey. Other limits to bear in mind:
- Leaks from walls, copings or rooflights
- The extent of water in the insulation
- Carrying out the repair work
Not sure which survey suits your roof? You can ring 07833 053749 or drop us an email and we’ll tell you. The full list of what we check.
What we check
- Commercial flat roofs
- Liquid-applied waterproofing
- Single-ply roofs
- Flat roof membranes
- Roof terraces and balconies
- Green roofs
Places near Pentonville
Other services in Pentonville
The survey, step by step
Every visit follows the same pattern: we listen to what’s been worrying you, inspect the roof from each safe vantage point, photograph what we find and make notes for the report. Most visits take longer on a large roof than a small one, and the build-up of the roof makes a difference too. In a London area like Pentonville, the main things to sort out are parking and access: let us know about permits, visitor bays or off-street space, which floor the property is on and how to get into the loft. We then look at whatever is safely visible from the ground, windows, the loft and, where it is safe, the roof itself.
- First, you let us know about the roof build-up and where water is showing.
- We check that the membrane and build-up suit electronic leak detection.
- The testing method is chosen to suit the membrane and build-up.
- Testing runs across the roof to locate breaches in the membrane.
- You get a report showing where each breach is, for your roofer to repair.
Getting ready for the survey
- If it isn’t your property yet, arrange access through the agent
- Mention any parking restrictions on your street
- Gather any invoices or paperwork from past roof work
How to book
Buyers should book once an offer has been accepted, so there is time to use the report before exchange. For any other survey, just ring 07833 053749 or drop us an email when you’re ready.
Advice
Before and after the survey
Here are a few things we’d tell any owner:
- Ask contractors to protect the membrane
- Share any drawings of the roof
- Don’t keep patching the same spot
- Stay off the flat roof unless needed
If water has been getting in, insulation under the membrane may be wet. That’s something to discuss with your roofer and other checks can help judge it.
Ask trades working on the roof to protect the membrane when they work up there. Have the roof looked at after other work.
What we are asked to look at in Pentonville
Holes in a membrane often come from feet, tools or debris. Many are tiny but water still finds them.
Problems we come across often include:
- Holes left by work on the roof
- Leaks showing away from the breach
- Breaches hidden under paving or planting
- Water coming in under a flat roof
If you run a business near Brunswick Centre, flat roofs over shops and units are easy to forget until water comes through a ceiling.
Before you book any roof surveyor
- Their track record with similar roofs
- What the report includes, and whether it has photos
- Which viewpoints they use to see the roof
- Their insurance cover