Greater London · London and the South East
West Twyford Electronic Leak Detection
Electronic leak detection to pinpoint holes in flat roof membranes in West Twyford. We’ve completed more than 5,000 surveys across London and the South East.
- Patched roofs that still leak
- Leaks through a flat roof with no obvious cause
- Holes around roof penetrations
When to book a survey in West Twyford
Water travels under flat roof membranes. The leak may show some distance from where water gets in, so tracing it by eye is difficult.
It is worth booking a survey if you’ve seen:
- Repairs that haven’t stopped the leak
- Damp inside with no sign on the roof
- Holes around roof penetrations
- Waterproofing to test before it’s covered
For hotels and guest houses around West Twyford, a roof problem found early is far less disruptive than one found by a guest, so it pays to find faults before guests do.
Choosing a roof surveyor
- Which limits apply to the survey
- Which viewpoints they use to see the roof
- Their report turnaround times
- Whether the inside of the roof is included
Electronic leak detection in West Twyford: what you get
Roofs covered with paving, ballast or planting need more thought. What sits on the membrane can affect which method will work, and some may need lifting. We will discuss it with you when we quote. Any details of the build-up help, as they show what lies beneath the surface. We will tell you if the roof cannot be tested. We survey liquid-applied waterproofing, commercial flat roofs and flat roof membranes, and people most often book us about new membranes needing a check before handover and leaks through a covered membrane.
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. In West Twyford, as anywhere in London, the right approach depends on what the roof is made of. Older flat roofs are often felt or asphalt, newer ones rubber or GRP.
We keep jargon out of it: if work is needed, the report says so clearly.
- Where
- West Twyford (NW10, HA0, W5)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Reports
- Emailed report with photos and recommendations
- Appointments
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Call
- 07833 053749
- Last updated
- 27 October 2026
Surveys for landlords and agents in West Twyford
We survey roofs for landlords and agents as well as householders. A written report with photographs gives you a clear record of the flat roof membrane, which helps you plan work between tenancies.
Businesses and commercial landlords can book us too. Larger roofs take longer, so they’re priced to suit.
Flat and commercial roofs around West Twyford
Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, often with hipped roofs of clay or concrete tiles. If your home in West Twyford is one of them, bay roofs, hips and later dormers each have their own details. Mixed in with those pitched roofs are a good many flat ones, over rear extensions, dormers, garages and shops. About 1.8 miles south-west lies Pitzhanger Manor, a reminder of how long the area around West Twyford has been built on. Older homes in the wider area often have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and a listed home or one in a conservation area may need consent for changes of material.
For businesses in and around places such as London Designer Outlet, a flat roof over a business is out of sight and out of mind until it leaks. Anyone responsible for a site like West Twyford Primary School will know that large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly.
West Twyford is about 2 miles west of Harlesden, in Greater London. Surveys in West Twyford work the same way as everywhere we cover: a careful inspection, photos and a written report. We cover towns and villages across Greater London. For surveys nearby, see our London page.
All of NW10, HA0 and W5 is covered for electronic leak detection, from the main roads to the quietest streets. That includes homes and businesses on Water Road, Dukes Road and Abbey Road and the roads around them. West Twyford is on the A40, so it’s easy for us to get to. We also cover Park Royal (1 mile south-east), Alperton (1 mile north-west), Stonebridge Park (1 mile north-east), Hanger Hill (1 mile south) and Stonebridge (1 mile north-east). Further out, we also cover London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles east), Kensington (4 miles south-east), St Pancras (7 miles east) and Shoreditch (9 miles east).
What’s near West Twyford
Locally, jobs take us to homes and businesses close to Ace Cafe London pub, Library for Iranian Studies and Alperton Community School and the streets around them. You will also find St. Raphael's Edible Garden (1.3 miles north-east) and The Ellen Wilkinson School for Girls (1.1 miles south). West Twyford’s nearest station is Stonebridge Park station, roughly 0.8 miles north. Other landmarks nearby include Central Middlesex Hospital (0.6 miles east) and London Designer Outlet (1.6 miles north). The countryside around West Twyford includes Hanger Hill Wood and Castlebar Hill.
How it works
We don’t take risks to get a closer look. Everything that can be seen safely is inspected, and anything we cannot see is noted in the report. Most visits take a length of time set by the size of the roof and how it’s built, which we set out in the quote. For a visit in West Twyford, parking and access are the things to plan: let us know about parking, the floor the property is on, any shared entrance and loft access. On the day, the roof is looked at from the ground, from windows, from inside the roof space and from the roof where it’s safe.
- We agree the area to be tested.
- We get the roof ready for testing.
- 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
- Make a note of anything you’d like us to look at
- Buyers: confirm access with the estate agent or seller
- Clear the way to the loft hatch
Arrange a survey
To book a survey, call 07833 053749 or use the contact form with the address and what you’d like to know about the roof. You’ll know the price before anything is booked.
Advice
Why get it checked now?
Some flat roof leaks come from walls or details. Testing shows whether the membrane is breached so attention can go to the right place. London’s older roofs often have bitumen felt underlay or none at all, so a slipped slate can soon mean water inside. Left alone, that means wet timbers and plaster, which is a far bigger job than the roof fault itself.
The cost of a survey depends on the roof: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. Electronic leak detection is quoted for your roof, because the method depends on the roof.
Why book us in West Twyford
- Independent findings on the roof’s condition
- PI and public liability insurance
- 98% customer satisfaction
- We hold a CAA Flyer ID and Operator ID
Read how roof surveys are priced and two real surveys.
Roof by roof
Green and ballasted roofs
Some layers may need lifting for testing. We discuss this before quoting.
Liquid-applied waterproofing
Liquid waterproofing has no laps, but can still have thin spots or holes. Whether ELD works depends on the coating and build-up.
Prices for electronic leak detection in West Twyford
Prices vary from roof to roof, for these reasons:
- How tall the building is and how easy the roof is to see
- Commercial roofs and larger buildings
- Features like valleys, chimneys, dormers and parapets
- Whether thermal imaging or a drone is needed
Larger roofs, taller buildings and commercial roofs take longer, so they’re priced to match. You will know the figure before booking.
What we need to know
You don’t need to know any roofing terms. Just let us know:
- Anything about access we should know
- Any photos you have, taken from the ground or a window
- Any marks or damp showing indoors
- The style of property, from a terrace to a block
Every survey is priced before it’s booked, 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, call 07833 053749 or use the contact form.
Towns and villages near West Twyford
What else we do in West Twyford
Common questions in West Twyford
Does a conservation area affect roof work in West Twyford?
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, and councils can also use Article 4 directions.
Do you cover commercial flat roofs around West Twyford?
Yes, we cover commercial roofs as well as homes. Access to the roof is sorted out with whoever manages the building before the day.
What if it rains on the day?
Light rain does not usually stop a survey. High wind or heavy rain can stop drone flights and make roof access unsafe, so if conditions are not right we will arrange another day with you.
Do I have to be there for the survey?
Someone needs to let us in if we’re looking inside or in the loft. Access is agreed with you when booking.
Will you go up on the roof?
Not always. Some roofs are too steep or fragile to walk on safely. We use safe viewpoints, the loft space and a drone where it applies.
What does electronic leak detection do?
A sound membrane blocks the test current, so wherever there is a hole, it passes through. That’s how we locate breaches you can’t see.
Do you use drones?
Where it helps and it is safe, yes. Whether we can fly on the day depends on the weather and the airspace rules, including flight restriction zones near airports. We are a CAA-registered drone operator.