West Sussex · London and the South East
Electronic leak detection in Crawley, West Sussex
Electronic leak detection to pinpoint holes in flat roof membranes in Crawley, using drones and thermal imaging where applicable. Call or email for a price.
- Stains far from any visible defect
- Holes around roof penetrations
- Leaks under green or ballasted roofs
When to book a survey in Crawley
If a flat roof keeps leaking after patching, the hole may be elsewhere. Electronic testing helps pinpoint it.
Typical things we are asked to look at include:
- Leaking laps in the waterproofing
- Punctures from foot traffic or tools
- New membranes needing a check before handover
- Stains far from any visible defect
Take an older house close to Friary Church of St Francis and St Anthony: the joins between later flat roofs and the old walls are where problems typically start.
Before you book any roof surveyor
- How soon the report will arrive
- Whether the price includes VAT
- How long they’ve been surveying roofs
- What they won’t be able to tell you
Electronic leak detection for homes and businesses in Crawley
ELD is a way of pinpointing breaches in a flat roof’s waterproofing membrane. It works with an electrical current which can only get through the membrane at a breach. That lets us locate holes that are too small to see, so your roofer can repair them. You get a report with photographs of each breach found. We’re often asked to look into breaches hidden under paving or planting and holes left by work on the roof, across liquid-applied waterproofing, commercial flat roofs and single-ply roofs.
Blocks of flats in places the size of Crawley usually have a shared flat roof, looked after by a managing agent, a residents’ company or the building owner. Leaks into top-floor flats are usually where trouble shows first. Finding the cause early limits the damage. Tell us who manages the building, as access to a shared roof has to be arranged.
The report does not just list problems. It explains what we found, why it matters and what we recommend, so you can plan your next steps.
- Place
- Crawley (RH10, RH11, RH12, RH6)
- Wider area
- West Sussex
- Price
- Quoted for your roof
- Your report
- A written report with photos, by email
- Appointments
- Weekdays and weekends
- Insured
- Professional indemnity and public liability
- Call
- 07833 053749
- Updated
- 27 October 2026
What happens on the day
Every visit follows the same pattern: we hear what you’ve seen, inspect the roof from every safe viewpoint, photograph what we find and record our findings for the written report. Most visits take more time on a big roof than a small one, and the build-up of the roof makes a difference too. In busier parts of Crawley, parking can be tight, so tell us about driveways, permits or nearby car parks, and for flats, mention stairs, lifts and shared entrances. The roof is inspected from the ground, from inside and, where it’s safe, from the roof itself.
- We start with what you know about the roof and the leak.
- We check whether the membrane and build-up suit ELD.
- We choose a low-voltage or high-voltage method to match the roof.
- We test the roof and locate any breaches.
- A report with photos shows where each breach is.
Before we arrive
- Make a note of anything you’d like us to look at
- Buyers: confirm access with the estate agent or seller
- Keep pets in another room
Arrange a survey
A quick phone call is normally the easiest start: call 07833 053749 or send us an email and we will ask a few questions about the roof. You will have a price before anything is arranged.
Advice
Nearby places to Crawley
What else we do in Crawley
Crawley: your questions answered
Do you carry out roof surveys in Crawley?
Yes, Crawley is one of the places we work. The survey and report are the same in Crawley as anywhere else, and visits run on weekdays and weekends.
How do I find out if my home in Crawley is listed?
For listing, use Historic England’s list; for conservation areas, ask the council. It matters most if you are planning to re-roof in a different material.
Do you use low-voltage or high-voltage testing?
We choose the method that suits the roof. You will know which method we plan to use before we start.
How much does electronic leak detection cost?
Electronic leak detection is quoted for your roof, because the method depends on the roof. The price depends on the roof’s size and build-up. For a quote, phone 07833 053749 or send us an email.
What insurance do you have?
Our surveys are covered by professional indemnity and public liability insurance. If you need details for a managing agent or a building owner, just ask.
Will you go up on the roof?
Only when it’s safe. Some roofs are too steep or fragile to walk on safely. Safe viewpoints, the loft and a drone where applicable let us see the rest.
I live in a flat. Can you survey the roof?
Yes, as long as access is agreed. The roof of a block or converted house is frequently shared, so whoever owns or manages the building needs to agree access. We can only inspect what we are given access to.
Flat roofs in Crawley
Older buildings may be listed or sit in a conservation area. Historic England’s list shows listed buildings, and the council can say whether a street is in a conservation area. Re-roofing in different materials may need permission there. Crawley is one of the post-war new towns. Many homes in the new towns date from the post-war decades, with concrete interlocking tiles, low-pitched roofs and flat-roofed garages and porches. Flat-roofed garages, porches and extensions from that era may have been re-covered more than once, or not at all. Cement sheet roofs on buildings from before 2000 may contain asbestos, so a specialist asbestos surveyor should check them before they’re disturbed.
For site and facilities teams at buildings such as Three Bridges Junior School, a large flat roof with lots of outlets and rooflights has many places where a membrane can fail. If you let a flat or house near Crawley station, a flat roof over a rented flat is easy to forget until the tenant reports a leak.
Crawley is about 27 miles south of London, in West Sussex. If you are in Crawley, booking works exactly as it does anywhere else: get in touch, agree the price and pick a day. Our West Sussex coverage includes Crawley.
All of RH10, RH11, RH12 and RH6 is covered for electronic leak detection, from the main roads to the quietest streets. You will find streets like Station Road, Queens Square and High Street, all of which we cover. With the A23 and A264 close by, Crawley is simple for us to get to for electronic leak detection. Close by, we survey roofs in Southgate (1 mile south-west), Tilgate (1 mile south-east), West Green (1 mile north), Three Bridges (1 mile east) and Langley Green (1 mile north). Further out, we also cover Horsham (7 miles south-west), Haywards Heath (9 miles south-east), Burgess Hill (11 miles south), East Grinstead (8 miles east), Billingshurst (13 miles south-west) and Roffey (5 miles south-west). Crawley is among the bigger towns we cover in West Sussex.
Local landmarks in Crawley
Typical jobs here are in homes near Tilgate Park, St Wilfrid's Catholic School and St Francis of Assisi Catholic Primary School. Crawley has its own railway station: Crawley station. A little further out are Crawley Hospital (0.5 miles north-west) and County Mall (within half a mile north-east). Not far away are Tilgate Lake.
What this survey cannot tell you
It’s a careful look at the flat roof membrane, not the whole story. Its limits include:
- Leaks from plumbing or windows
- Moisture spread under the membrane
- Areas we cannot reach or that cannot be tested
If you’re not sure which survey you need, ring 07833 053749 or use the contact form and we’ll give you a straight answer before you book. What our survey covers.
What we check
- Commercial flat roofs
- Roof terraces and balconies
- Single-ply roofs
- Liquid-applied waterproofing
- Flat roof membranes
- Green roofs
Why get it checked now?
Repairs in the wrong place leave the leak in place. Testing shows where the membrane is actually breached. A small defect on a roof in Crawley seldom stays small: a slipped slate or cracked ridge lets in water, water rots battens, and more slates or tiles follow. Early action is normally the cheaper option.
The cost of a survey depends on the roof: 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 with us
- Surveys seven days a week
- Satisfaction rate of 98%
- CAA-registered drone operator (Flyer ID and Operator ID)
- Two decades and more of roof surveys
Take a look at what a roof survey costs or two real surveys.
Checking the roof from the ground
After strong wind, take a look from the pavement or garden: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Leave anything above ground level to a survey.
Watch the gutters in a downpour, from a window or the ground. Overflowing water can be a sign of a blockage or a gutter that has dropped.
What a survey costs
A few things affect what a survey costs:
- How tall the building is and how easy the roof is to see
- Any need for thermal images or a drone flight
- The number of roofs, including extensions and garages
- Chimneys, valleys, parapets and other details
All our prices include VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You’ll know the exact price before you book.
What to let us know when you get in touch
Before you get in touch, it helps to have:
- Where the property is, with the postcode
- Pictures of the roof from a safe spot, if you have them
- What’s prompted the survey
- What kind of property and roof it is
If you are buying, it helps to book soon after your offer is accepted, so you have the findings in time to act on them before you exchange. Otherwise, simply phone 07833 053749 or send us an email whenever suits you.