Greater London · London and the South East
Electronic leak detection in Westminster, Greater London
Electronic leak detection to pinpoint holes in flat roof membranes in Westminster. More than 5,000 surveys completed across London and South East England.
- Repairs that haven’t stopped the leak
- Punctures from foot traffic or tools
- Leaking laps in the waterproofing
Why it’s worth a survey now in Westminster
Cutting open a flat roof to find a leak can cause more damage. ELD aims to locate the breach first, so the repair can be targeted. A hidden valley or parapet gutter on a London house can hold water for weeks before anyone notices. When the stain finally shows, the damage underneath is frequently older than it looks.
What a survey costs comes down to the roof itself: its size, its height, how many sections it has and how it can be reached and seen safely. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Why book us in Westminster
- Photographs and a written report every time
- Insured for professional indemnity and public liability
- Over 20 years’ experience
- An independent look at the roof
See how roof surveys are priced and what we found on two real jobs.
How electronic leak detection works in Westminster
Some flat roofs can’t be tested electronically. Some membranes conduct electricity themselves, and some build-ups lack the layer the test needs below 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, including drawings, specifications or the roofer’s paperwork. It avoids arranging a test that can’t give results. If you’re worried about damage from equipment installers and leaking laps in the waterproofing, we can find out what’s behind it, on liquid-applied waterproofing, commercial flat roofs and green roofs alike.
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 Westminster, 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.
The report doesn’t just list problems. It explains what we found, why it matters and what we recommend, so you can decide what to do next.
- Place
- Westminster (SW1P, W1J, SW1V)
- Wider area
- Greater London
- Price
- Quoted for your roof
- Reports
- Emailed report with photos and recommendations
- When we survey
- Weekdays and weekends
- Insurance
- PI and public liability insurance
- Phone
- 07833 053749
- Last updated
- 27 October 2026
How it works
We check the roof from outside and, where it’s relevant and there is safe access, from inside the loft space too. Inside, we look for staining, damp, gaps and signs of movement, as far as the space allows. The whole visit usually takes longer on a large roof than a small one, with the construction of the roof playing a part too. In a London area like Westminster, the main things to sort out are parking and access: tell us 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 the ground, windows, the loft and, where it is 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.
- You receive the results to pass to your roofer.
Before we arrive
- Have any questions written down, so nothing gets missed
- Find any records of previous roof work
- Leave a clear route to the loft
Booking a survey
To book a survey, call 07833 053749 or send us an email with the address and what you’d like to know about the roof. We’ll confirm the price before you book.
Read more
Honest limits
Before booking, it’s worth knowing what a survey will not do:
- Water entering through details rather than the membrane
- Fixing the holes we find
- The extent of water in the insulation
If in doubt, phone 07833 053749 or email us and we will suggest the right survey. What a survey covers and doesn’t.
What we look at
- Roof terraces and balconies
- Liquid-applied waterproofing
- Flat roof membranes
- Commercial flat roofs
- Green roofs
- Single-ply roofs
Checking the roof from ground level
Watch the gutters in a downpour, from a window or the ground. Water spilling over the edge can point to a blockage or a sagging run.
Keep a simple record: dates of leaks, photos from ground level and any work done on the roof. Share it with us when booking, as it helps us focus the survey.
Flat and commercial roofs around Westminster
The wider area around Westminster has a long history of building, with Clarence House about 0.4 miles north-west. 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. There are several hotels within about a mile and a half of Westminster. For hotels and other commercial buildings, finding the cause of a flat roof leak quickly keeps rooms in use.
A roof leak in a hotel or guest house around Westminster means lost rooms as well as repairs. For landlords with property near London Victoria station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Westminster is about 1 mile south-east of City of Westminster, in Greater London. We survey roofs in Westminster and the rest of Greater London, as part of our work across London and South East England. Across Greater London, we cover Westminster.
We cover every part of SW1P, W1J and SW1V for electronic leak detection and the streets around it. We offer electronic leak detection to properties on Eaton Lane, Wilton Road and Castle Lane and the roads around them. Being close to the A4 and A202, Westminster is easy for us to reach. Other places close to Westminster include Millbank (1 mile north), Victoria (1 mile south-west), Pimlico (1 mile south), Vauxhall (1 mile south-east) and Lambeth (1 mile south-east). Further out, we also cover Kensington (3 miles west), Shoreditch (3 miles north-east), Walthamstow (8 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles north-east) and Hampstead (4 miles north-west).
What’s near Westminster
We work in homes and buildings around St Matthew's School, St James's Park and Blewcoat School and the streets around them. Nearby too are London Library (0.6 miles north) and Grafton Arms (under half a mile south). Westminster’s nearest station is London Victoria station, roughly 0.6 miles south-west of the centre. Well-known places in the area include Westminster Hospital (less than half a mile east) and The Crime Museum (within half a mile south). The countryside around Westminster includes Barnsbury Wood and St. James's Park Lake.
What a survey costs
All our prices include VAT. What changes the price is:
- Building height and the viewpoints available
- The roof’s overall size
- The type of building, from a house to a block or an office
- The shape of the roof and its details
For a price for your roof in Westminster, ring 07833 053749 or use the contact form and tell us about the roof. The price is agreed before a date is set.
Helping us price your survey
A little information up front helps. Please include:
- The address and postcode of the property
- The reason for the survey, such as buying, a leak or storm damage
- Where any leaks, stains or damp patches show inside
- Access details, such as a loft hatch or a shared roof
We survey roofs seven days a week. To arrange a day that suits you, ring 07833 053749 or send us an email.
Your questions about electronic leak detection in Westminster
Does a conservation area affect roof work in Westminster?
We can’t confirm that for you, but Historic England’s list and your council can. A change of roofing material may need consent in either case, and councils can also use Article 4 directions.
Can parking be tricky for a visit in Westminster?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
How long does electronic leak detection take?
The roof’s size and build-up decide how long it takes. You will know roughly how long before we start.
What if it rains on the day?
Light rain does not normally stop a survey. Heavy rain or strong wind can ground a drone and make the roof unsafe, so we’ll agree a new date if the weather isn’t suitable.
What does the report include?
You get our findings in writing, part by part, with photos, finishing with recommendations. Points are put in order of urgency where relevant.
What insurance do you have?
Every survey is covered by professional indemnity and public liability insurance, and details are available on request.
Is my roof suitable for ELD?
That depends on the roof’s membrane and layers. Tell us what you know about the roof and we will confirm suitability.
Do you need electronic leak detection in Westminster?
New membranes can have defects from installation. ELD on a new roof can show holes before they cause leaks.
A survey can pick up problems such as:
- Patched roofs that still leak
- Leaks through a flat roof with no obvious cause
- Leaks under green or ballasted roofs
- Punctures from foot traffic or tools
If you run a business near Kingly Court, flat roofs over shops and units are easy to forget until water comes through a ceiling.
Questions to ask before booking
- What experience they bring
- How they plan to inspect the roof safely
- Whether the loft is part of the inspection
- Whether any drone flown is registered with the CAA