West Sussex · London and the South East
Crawley Down Electronic Leak Detection
Wondering about the flat roof membrane at a property in Crawley Down? We carry out electronic leak detection in Crawley Down and across West Sussex.
- Failed seams and laps
- Stains far from any visible defect
- Leaks through a covered membrane
Electronic leak detection for homes and businesses in Crawley Down
ELD is a way of pinpointing breaches in a flat roof’s waterproofing membrane. It uses a small electrical current that passes through the membrane only where there’s a breach. That lets us locate holes that are too small to see so your roofer knows exactly where to repair. You get a written report with photographs of each breach found. We survey liquid-applied waterproofing, single-ply roofs and commercial flat roofs, and common reasons people get in touch are leaks at pipes, outlets or fixings and leaks through a flat roof with no obvious cause.
Around Crawley Down, many homes have a garden room, garage or outbuilding with a flat roof. They’re rarely looked at until something gets wet. It’s worth mentioning them when booking, so the visit can include them. Smaller roofs use the same coverings as bigger ones, from felt to rubber and GRP, and age in the same way.
The report is written in plain words, so you don’t need to be a roofer to follow it. Each point is backed by a photo where possible.
- Where
- Crawley Down (RH10)
- Region
- West Sussex
- Cost
- Quoted for your roof
- Reports
- A written report with photos, by email
- Appointments
- Monday to Sunday, daytime
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
Flat roofs in Crawley Down
With Saint Hill Manor about 2.4 miles south-east, Crawley Down sits in an area with a long building history. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and a listed home or one in a conservation area may need consent for changes of material. Many older homes in Sussex have handmade clay tiles and tile-hung walls. A few old Sussex buildings still carry heavy Horsham stone slabs. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere.
If you let a flat or house near East Grinstead station, the flat roof over a let home is worth a look before it becomes a tenant complaint. The streets around a church such as All Saints Parish Church are frequently among the oldest in a place, and if your home is one of the older ones nearby, the flat roofs on later extensions tend to wear out long before the main roof.
Crawley Down is about 3 miles west of East Grinstead, in West Sussex. Crawley Down is one of many places we visit across West Sussex, for homes and businesses alike. Our area takes in places right across West Sussex, large and small.
Every address in RH10 is covered for electronic leak detection, from the main roads to the quietest streets. If you need electronic leak detection at a property on Station Road, Forest Close and Burleigh Way or a nearby road, we can survey it. Other places close to Crawley Down include Furnace Wood (1 mile north), Snow Hill (1 mile north), Turners Hill (1 mile south), Domewood (1 mile north) and Felbridge (2 miles north-east). Within a short drive, we also cover Crawley (5 miles west), Horsham (11 miles west), Haywards Heath (9 miles south), Burgess Hill (12 miles south), East Grinstead (3 miles east) and Broadfield (6 miles west).
Local landmarks in Crawley Down
Typical jobs here are in homes near Imberhorne School. For rail, the closest station is East Grinstead station, roughly 2.5 miles east. Other landmarks nearby include Queen Victoria Hospital (3.5 miles east) and Effingham Park Motor Museum (1.4 miles north-west). The countryside around Crawley Down includes Hedgecourt Lake.
Should I look at the roof myself first?
After strong wind, take a look from the pavement or garden: pieces of tile or slate on the ground, a gap in the ridge or a lifted flashing are all worth noting. Don’t go up yourself.
Fresh stains on ceilings or walls after rain are worth noting. Take a photo and write down when you saw it.
Towns and villages near Crawley Down
More services for Crawley Down
Landlords, agents and block managers in Crawley Down
Where a roof is shared: we need access agreed with whoever owns or manages the building. Mention it when you get in touch and we’ll plan the visit with that in mind.
With a portfolio of properties, surveys can be booked for more than one address. To discuss a number of properties, call 07833 053749 or use the contact form.
FAQs for Crawley Down
Does a conservation area affect roof work in Crawley Down?
Historic England’s list shows listed buildings, and the local council can tell you about conservation areas. Listed building consent is needed for changes that affect a listed building’s special interest, and conservation areas can limit changes of roofing material.
Will you come out to Crawley Down?
Yes. Crawley Down is within the area we cover, which takes in towns, villages and rural addresses. We work right across London and the South East. Let us know about access, parking and anything unusual about getting there as you book.
How long have you been surveying roofs?
More than 5,000 surveys over 20+ years, across London and South East England.
What if it rains on the day?
Some surveys depend on the weather more than others. Drone flights need calm, dry weather, and thermal imaging works best after a sunny day, with a dry roof and little wind. We’ll rearrange with you if the weather is not right.
Do you use low-voltage or high-voltage testing?
The roof decides the method. You’ll know which method we plan to use before we start.
Does someone need to be in?
That depends on the survey. Inside the building and in the loft, we need someone to let us in, while outside access can be discussed when booking.
What is electronic leak detection?
The waterproofing membrane normally stops an electrical current, so wherever there’s a hole, it passes through. That lets us find breaches that are too small to see.
Honest limits
A survey is a close look at the flat roof membrane, but it can’t do everything. The main limits are:
- Areas we cannot reach or that can’t be tested
- Repairing the breaches (that’s for your roofer)
- Roofs whose membrane or build-up is not suitable
If in doubt, call 07833 053749 or send us an email and we will suggest the right survey before you book. What a survey covers and does not.
What this survey covers
- Single-ply roofs
- Flat roof membranes
- Liquid-applied waterproofing
- Roof terraces and balconies
- Green roofs
- Commercial flat roofs
The survey, step by step
Every visit follows the same pattern: we hear what you’ve seen, inspect the roof from every safe viewpoint, photograph what we find and make notes for the report. It usually takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. In a smaller place like Crawley Down, parking is seldom the issue; lanes, gates and long drives are worth mentioning. On bungalows and lower roofs, much can be seen from the ground, with the loft showing the underside.
- First, we confirm which roof areas are included.
- The surface is prepared for the chosen method.
- Testing runs across the agreed area.
- We mark the breach locations in our records.
- You receive the results to pass to your roofer.
Before the survey
- Let us know about any leaks, stains or damp patches you know of
- If it isn’t your property yet, arrange access through the agent
- Dig out any old roof reports or invoices
Booking a survey
You can call us seven days a week, including Saturdays and Sundays. For a price or to book, call 07833 053749 or drop us an email.
Advice
Different roofs, different checks
Liquid-applied waterproofing
Testing a liquid-applied roof depends on what’s beneath the coating.
Inverted and paved roofs
If the build-up rules out ELD, we will say so.
What affects the cost of electronic leak detection
The price reflects the time and kit the roof needs. The main factors are:
- How big the roof is
- The height of the building and how the roof can safely be seen
- The type of building, from a house to a block or an office
- Features like valleys, chimneys, dormers and parapets
Every price we give includes VAT. We quote electronic leak detection for each roof, as the method and time depend on the roof. We confirm the price for your survey before booking.
What we need to know
When you call or email, these details help:
- Any stains, drips or damp patches you’ve seen indoors
- Pictures of the roof from a safe spot, if you have them
- What kind of property and roof it is
- Your timetable, such as an exchange date
We survey roofs seven days a week. To find a date that works for you, call 07833 053749 or send us an email with the address and the days you’d prefer.