Greater London · London and the South East
Electronic Leak Detection in Upper Holloway
Electronic leak detection to pinpoint holes in flat roof membranes in Upper Holloway, with drones and thermal imaging where they help. Get in touch for a price.
- Leaks at pipes, outlets or fixings
- Leaks that return after repairs
- Failed seams and laps
Useful tips for Upper Holloway property owners
Nothing here needs a ladder. A few suggestions:
- Do not let outlets block
- Don’t leave water getting in
- Stay off the flat roof unless needed
- Test new membranes before covering them
Keep the report with the roof’s records. It is a dated record of the membrane’s condition.
Check contractors protect the waterproofing when they work up there. Check the roof after they’ve finished.
Electronic leak detection in Upper Holloway
Some flat roofs can’t be tested electronically. Certain membranes conduct electricity and some roofs don’t have a suitable layer beneath the membrane. We will say if ELD won’t work on your roof at the start. Telling us what you know about the roof’s membrane and layers helps, like drawings or specifications. It avoids arranging a test that can’t give results. We survey flat roof membranes, single-ply roofs and green roofs, and people most frequently book us about gaps at membrane joints and leaks through a flat roof with no obvious cause.
Offices, shops and blocks of flats across London often have large flat roofs with plant, rooflights and walkways. Each pipe, upstand and fixing through the covering is a possible weak point. In Upper Holloway, roof access is agreed with the building manager or owner beforehand. Plant bases, rooflights and cable entries are all places where water can get in.
We keep jargon out of it: if work is needed, the report says so clearly, and where it can wait, that’s said too.
- Location
- Upper Holloway (N19, N7, N6)
- Region
- Greater London
- Prices
- Quoted for your roof
- Reports
- A written report with photos, by email
- Survey days
- Weekdays, Saturdays and Sundays
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
Do you need electronic leak detection in Upper Holloway?
Other trades on the roof can puncture the waterproofing. Fixings, equipment and foot traffic can leave small holes.
Signs worth acting on include:
- Holes around roof penetrations
- Leaks under green or ballasted roofs
- Patched roofs that still leak
- Leaks through a flat roof with no obvious cause
If you live in an older home near St Andrew's Whitehall Park, the joins between later flat roofs and the old walls are where problems usually start.
Before booking anyone
- Their track record with similar roofs
- Their report turnaround times
- Which limits apply to the survey
- Whether the price includes VAT
DIY checks: what’s safe
After heavy rain, check ceilings and the tops of walls for new stains. Photograph them and note the date, as it helps a surveyor trace the cause.
What you can’t do safely is get up close. Slates, tiles, flat roofs and rooflights can give way, and falls from height are serious. That part is for a survey, using safe viewpoints and a drone where it applies.
What we do, step by step
The visit normally starts outside and finishes in the loft: first the slopes, edges and gutters from every safe viewpoint, then the roof space where it can be reached. All told, expect a time that depends on the size of the roof and how it’s built, which we’ll explain when we quote. In a London area like Upper Holloway, 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 everything that’s safely in view from ground level, windows, the loft and, where it’s safe, the roof itself.
- First, we confirm which roof areas are included.
- The surface is prepared for the chosen method.
- Testing runs across the agreed area.
- Each breach found is located and recorded.
- The report is sent for your roofer to act on.
Before we arrive
- If you are buying, let the agent know when we’re coming
- If the roof is shared, arrange access with whoever manages the building
- Clear the way to the loft hatch
Book a survey
You can call us seven days a week. For a price or to book, call 07833 053749 or email us.
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Flat roofs in Upper Holloway
Historic houses such as Witanhurst, about 0.9 miles west, show how far back building in the area around Upper Holloway goes. If your house is among the older ones, 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. Close to the centre of London, a great many houses are Victorian or Edwardian terraces, many of them roofed in Welsh slate. Many have butterfly roofs draining to a central valley gutter, with parapet walls and gutters hidden behind them. If your home in Upper Holloway is one of them, lead flashings, party-wall upstands and shared chimney stacks are part of the picture too. Next to the main roofs there is usually a flat roof somewhere, whether on an extension, a garage or a commercial unit.
If you run a business near The Mall Wood Green, a flat roof over a business is out of sight and out of mind until it leaks. Landlords with a home close to Upper Holloway station may find that a flat roof over a rented flat is easy to forget until the tenant reports a leak.
Upper Holloway is about 2 miles east of Hampstead, in Greater London. We survey roofs in Upper Holloway and the rest of Greater London. We cover towns and villages across Greater London, from the larger towns to small villages.
All of N19, N7 and N6 is covered for electronic leak detection. Whether your property is on Ward Road, Kiver Road and Foxham Road or a nearby road, we can help. With the A103 close by, Upper Holloway is easy for us to reach. If you are just outside Upper Holloway, we cover Tufnell Park (1 mile south), Dartmouth Park (1 mile south-west), Highgate (1 mile north-west), Nag's Head (1 mile south-east) and Holloway (1 mile south-east). Larger places within reach include London (5 miles south), City of Westminster (4 miles south), Marylebone (3 miles south), Kensington (5 miles south-west), St Pancras (3 miles south) and Shoreditch (4 miles south-east).
Around Upper Holloway
Around Upper Holloway, our work takes us to homes and buildings near City of London Academy, Whittington Park and The Mother Red Cap pub and the streets around them. Nearby too are Asanté Academy of Chinese Medicine (1.2 miles north-west) and Vaughan Williams Memorial Library (2 miles south). There is a railway station in Upper Holloway itself: Upper Holloway station. Well-known places in the area include The Mall Wood Green (2.3 miles north-east) and Royal Northern Hospital (0.5 miles south-east). For a walk, there’s Dartmouth Park Hill and Parkland Walk.
What we cannot see
Some things can’t be seen without opening up the roof, so a survey has limits:
- Fixing the holes we find
- Some conductive membranes
- Areas we can’t reach or that cannot be tested
If you’re not sure which survey you need, call 07833 053749 or send us an email and we will give you a straight answer. What a survey covers and doesn’t.
What this survey covers
- Roof terraces and balconies
- Green roofs
- Liquid-applied waterproofing
- Commercial flat roofs
- Flat roof membranes
- Single-ply roofs
Towns and villages near Upper Holloway
What else we do in Upper Holloway
Roof by roof
Bituminous membranes
Bituminous felt and modified bitumen membranes are common. The build-up decides which method will work.
EPDM rubber roofs
EPDM is a long-lasting flat roof membrane, but punctures and seam failures still happen.
Your questions about electronic leak detection in Upper Holloway
Does a conservation area affect roof work in Upper Holloway?
Your council is the best source, with Historic England’s list for listed buildings. Both listing and conservation areas can limit changes of roofing material.
Do you cover Upper Holloway?
Yes, Upper Holloway is within the area we cover. We survey roofs across London and South East England. Just ring 07833 053749 or use the contact form and let us know about the property.
Can you give me structural calculations?
No. We point out what can be seen, such as sagging or deflection, but we don’t carry out calculations or give an engineer’s opinion. Where an engineer is needed, we say so in the report.
What’s the price of ELD?
We quote electronic leak detection for each roof, as the method and time depend on the roof. The price depends on the roof’s size and build-up. To get a quote, ring 07833 053749 or drop us an email.
Do you climb onto every roof?
Only when it’s safe. Safety comes first, and fragile or steep roofs can’t always be walked on. We use safe viewpoints, the roof space and a drone where applicable.
What’s in the survey report?
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 need to be at home?
It depends on what we need to see. Inside the building and in the loft, we need someone to let us in.