Greater London · London and the South East
Electronic Leak Detection in Bloomsbury
A careful look at the flat roof membrane at your property in Bloomsbury, with photos and a written report.
- Punctures from foot traffic or tools
- Repairs that haven’t stopped the leak
- Failed seams and laps
Roof by roof
Single-ply membranes
Single-ply can be punctured by tools or fixings. Testing helps find them.
EPDM rubber roofs
Whether an EPDM roof can be tested depends on the membrane and build-up. We look at this first.
How electronic leak detection works in Bloomsbury
ELD can be carried out in more than one way. Low-voltage methods typically need a wet roof surface and high-voltage methods need the membrane dry and exposed. Which one suits depends on the membrane and the layers of the roof, and we’ll explain our choice. We’ll say if your roof doesn’t suit either method at the outset. We survey single-ply roofs, roof terraces and balconies and flat roof membranes, and people most often book us about breaches around outlets and penetrations and punctures from foot traffic or tools.
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 Bloomsbury, the flat roof is often a shared part of the building.
Findings are set out part by part, from the main slopes down to the gutters and outlets, with a note and a photo for each point. You will see the good as well as the bad.
- Location
- Bloomsbury (NW1W, W1T, NW1)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- Survey days
- Weekdays and weekends
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
What you can safely check yourself
Keep a simple record: when leaks happen, ground-level photos and any past roof work. Share it with us when you book.
Inside, the loft is a good place to look, with care. Use a torch and stay on the joists or boards, checking for stains, damp wood or chinks of daylight.
Tips from our surveys
Most of what helps is simple and safe from ground level. Our suggestions:
- Tell us about the membrane and build-up if you know it
- Stay off the flat roof unless needed
- Test new membranes before covering them
- Do not keep patching the same spot
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.
Keep people off the flat roof unless they need to be there. Many breaches come from foot traffic.
Your questions about electronic leak detection in Bloomsbury
Do you look at commercial flat roofs near Bloomsbury, such as hotels?
Yes, we cover commercial roofs as well as homes. Access to the roof is sorted out with whoever manages the building before the day.
How do I find out if my home in Bloomsbury 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.
Do you climb onto every roof?
Only if it is safe. We inspect whatever is safely visible: from the ground, from windows and vantage points, from the loft space, from the roof itself where safe and by drone where it applies. The report says if anything couldn’t be seen.
Which days do you carry out surveys?
Visits run seven days a week in the daytime, which suits people who work during the week. Let us know your preferred days when booking.
Can you survey in bad weather?
Light rain is normally fine; heavy rain and wind are different. Strong wind or a downpour can make access unsafe and ground a drone, so we’d move the date with you.
Can you inspect my roof with a drone?
Where it helps and it is safe, yes. Flights depend on the weather on the day and airspace rules. We’re a CAA-registered drone operator.
Does this replace a RICS home survey?
No. Our survey is a roof survey, not a RICS Level 2 or Level 3 survey of the whole building. It focuses on the roof, so it sits alongside a building survey rather than replacing it.
What we’re asked to look at in Bloomsbury
Other trades on the roof can puncture the waterproofing. Fixings, equipment and foot traffic can leave small holes.
Common reasons to book include:
- Leaks under green or ballasted roofs
- Leaks through a flat roof with no obvious cause
- Holes around roof penetrations
- Damp inside with no sign on the roof
If you own a rental within reach of London Euston station, flat roofs over rear additions and dormers in rented property are worth checking between tenancies.
Questions to ask before you book
- How long they’ve been surveying roofs
- Whether any drone flown is registered with the CAA
- What follow-up you get after the report
- What the survey will not cover
What we do, step by step
On the day, we start by asking what you’ve noticed and what you’d like to know. After that, we look at everything we can see safely. The survey usually takes a time that depends on the size of the roof and how it’s built, which we set out in the quote. In converted houses and mansion blocks, the loft hatch is often on a shared landing. If that applies to your building, it helps to agree access with the neighbours or the managing agent first. Otherwise, the visit in Bloomsbury runs like any other.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- We check that the membrane and build-up suit electronic leak detection.
- We pick the low-voltage or high-voltage method that suits the roof.
- The roof is tested and any breaches are located.
- You get a report showing where each breach is, for your roofer to repair.
How to prepare
- For a flat or shared roof, check access with whoever owns or manages the building
- Point out any leaks or damp patches
- Gather any invoices or paperwork from past roof work
Getting a price
Booking 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.
Related advice
How we price electronic leak detection
A few things affect what a survey costs:
- The number of roofs, including extensions and garages
- The shape of the roof and its details
- Commercial roofs and larger buildings
- Height and safe access
Bigger, taller and commercial roofs take more time to survey, so the price reflects that. The price is confirmed before you book.
What to let us know when you contact us
To price your survey accurately, we will ask about:
- Pictures of the roof from a safe spot, if you have them
- Your timetable, such as an exchange date
- Where any leaks, stains or damp patches show inside
- The address and postcode of the property
If you have photos of the roof, send them over. Take them safely from ground level or a window, and please do not climb up for a closer look. To send them or to book, call 07833 053749 or email us.
Flat and commercial roofs around Bloomsbury
Dr Johnson's House, about 0.9 miles south-east, is one of the historic houses in the wider area around Bloomsbury. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, 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. Behind many of their parapets sit butterfly roofs and valley gutters that can’t be seen from the pavement. In a house like that, shared stacks, party-wall upstands and lead flashings all need looking at as far as they can be seen. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere.
If you run a business near Brunswick Centre, flat roofs over shops and units are easy to forget until water comes through a ceiling. If you run a hotel or guest house in or near Bloomsbury, a roof problem can mean rooms out of use, so it is worth knowing the roof’s condition.
Bloomsbury is about 1 mile north-east of City of Westminster, in Greater London. Whether the building in Bloomsbury is a house, a flat or a commercial unit, we can survey the roof on a weekday or at the weekend. Our area takes in places right across Greater London, large and small.
All of NW1W, W1T and NW1 is within our area for electronic leak detection, from the main roads to the quietest streets. If you need electronic leak detection at a property on Drury Lane, Euston Road and Duke's Road or anywhere close by, we can survey it. With the A401 and A501 close by, Bloomsbury is simple for us to get to. We also cover the places around Bloomsbury: St Pancras (1 mile north-east), Euston (1 mile north-west), Kings Cross (1 mile north), Holborn (1 mile east) and Fitzrovia (1 mile west). Larger places within reach include Kensington (4 miles south-west), Walthamstow (6 miles north-east), Hampstead (3 miles north-west), Ruislip (13 miles west), Brompton (3 miles south-west) and Stockwell (4 miles south).
Landmarks near Bloomsbury
Typical jobs here are in homes near Lincoln's Inn Fields, Pilsudski Institute of London and St George the Martyr Church of England Primary School, among other places. Nearby too are Queens Larder Public House (under half a mile south-east) and Maria Fidelis Catholic School FCJ (0.6 miles north-west). The nearest railway station is London Euston station, roughly 0.6 miles north-west. Well-known places in the area include Montfichet's Tower (1.2 miles south-east) and National Hospital for Neurology and Neurosurgery (within half a mile south-east). For a walk, there’s Barnsbury Wood and Ludgate Hill.