West Sussex · London and the South East
Thorney Island Electronic Leak Detection
Electronic leak detection to pinpoint holes in flat roof membranes in Thorney Island. We have completed more than 5,000 surveys across London and the South East.
- Punctures from foot traffic or tools
- Leaks through a flat roof with no obvious cause
- Leaking laps in the waterproofing
Electronic leak detection in Thorney Island
Some flat roofs can’t be tested electronically. Some membranes conduct electricity themselves and some roofs do not have a suitable layer beneath the membrane. If your roof is not suitable, we will tell you before any testing. Telling us what you know about the roof’s membrane and layers helps, such as drawings or specifications. It saves a wasted visit. If you are worried about leaks at pipes, outlets or fixings and a flat roof leak that can’t be traced, a survey will tell you what’s going on, on roof terraces and balconies, flat roof membranes and commercial flat roofs alike.
Older buildings in small places like Thorney Island may be listed or in a conservation area, which can shape what a new flat roof may look like. If you’re planning work, check with the council first. Finding out what state the roof is in gives you the facts to plan with. Listed building consent is needed for changes that affect a listed building’s special interest.
We keep jargon out of it: where something needs attention, it says so plainly, and where it can wait, that is said too.
- Place
- Thorney Island (PO10)
- Region
- West Sussex
- Prices
- Quoted for your roof
- Report
- Emailed report with photos and recommendations
- Survey days
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Flat roofs in Thorney Island
Thorney Island is within about 1 mile of the coast, and being near the sea means more wind and salt than a roof inland would face. Wind can catch loose edges and trims on a flat roof, and salt air is hard on metal trims, flashings and fixings. Older houses across Sussex often have handmade clay tiles, and many have tile-hanging on their upper walls. Some old buildings in Sussex have Horsham stone slab roofs. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises.
If you look after a building like Thorney Island Community Primary School, large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly. Historic houses such as Warblington Castle, about 2.1 miles north-west, show how far back building around Thorney Island goes. On a period home nearby, any flat roof is likely to be a later addition with its own lifespan.
Thorney Island is about 4 miles south-east of Havant, in West Sussex. We survey roofs in Thorney Island and the rest of West Sussex. Our area takes in places right across West Sussex. Our Portsmouth page covers surveys nearby.
Every address in PO10 is covered for electronic leak detection, from the main roads to the quietest streets. We cover properties on Hunter Road, Emsworth Road and Spartan Close and the roads around them. Neighbouring places we cover for electronic leak detection include West Thorney (1 mile south-east), North Hayling (1 mile west), Tye (1 mile south-west), Northney (1 mile west) and Emsworth (2 miles north). We also work in nearby towns like Bognor Regis (11 miles east), Chichester (7 miles east), Selsey (9 miles south-east), Portfield (7 miles east), Yapton (14 miles east) and East Wittering (5 miles south-east).
Local landmarks in Thorney Island
Locally, jobs take us to homes and businesses close to Bourne Community College and Eames Farm and the streets around them. The nearest railway station is Southbourne station, about 1.8 miles north-east. Nearby you’ll also find Havant War Memorial Hospital (3.2 miles north-west) and Emsworth Museum (1.6 miles north). Not far away are Nutborne Marshes.
The survey, step by step
Every roof is different, but as a rough guide the survey takes as long as needed for the membrane area and the build-up, and we’ll give you a guide when quoting. You are welcome to ask questions while we are there. Older roofs in small places like Thorney Island can have low, tight loft spaces, so it is useful to know whether there is a loft hatch and how easy it is to reach. We only go where it is safe.
- We start with what you know about the roof and the leak.
- The roof is assessed for suitability first.
- We choose a low-voltage or high-voltage method to match the roof.
- The membrane is tested and breaches are found.
- You get a report with photos of each breach.
Getting ready for the survey
- If you’re buying, check with the agent that we can get in
- Let us know where we can park nearby
- Clear the way to the loft hatch
How to book
To book a survey, ring 07833 053749 or drop us an email and let us know the address and what’s prompted the survey. You’ll know the price before anything is booked.
Related advice
Checking the roof from the ground
Watch the gutters in a downpour, from a window or the ground. Overflowing water can point to a blockage or a sagging run.
A DIY look is useful, but it isn’t a survey. From ground level, valleys, flashings and the backs of chimneys are often out of sight.
FAQs for Thorney Island
Do you cover smaller places like Thorney Island?
Yes, Thorney Island is on our map. Villages and rural addresses get the same survey as a town house.
Does being near the coast affect roofs in Thorney Island?
Places near the sea get more wind and more salt in the air than inland, and both are hard on roofs. Salt corrodes metal fixings and flashings, and wind lifts loose slates, tiles and ridge pieces.
Which method do you use?
The method is chosen to suit the roof. Low-voltage testing usually needs a wet surface and high-voltage methods need the membrane dry and exposed.
Can you survey at the weekend?
We survey on any day from Monday to Sunday, during the day, which suits people who work during the week. Let us know your preferred days when booking.
How do I book a survey in Thorney Island?
It is easiest to call 07833 053749 or use the contact form. Tell us the address and a little about the roof, and we’ll suggest the right survey. We survey on any day of the week.
How is ELD priced?
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. To get a quote, ring 07833 053749 or send us an email.
What’s in the report?
It explains what we saw, what it means and what we’d suggest, backed by photos. It also says if any part of the roof couldn’t be seen safely, so you know exactly what was covered.
Prices for electronic leak detection in Thorney Island
Prices always include VAT. The things that change the price are:
- The roof’s overall size
- How many separate roofs there are, such as extensions, dormers and garages
- If the survey needs thermal imaging or a drone
- Height and safe access
Every price we give includes VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You’ll know the price for the job before you book.
What to let us know when you get in touch
Some details help us recommend the right survey and price. When you contact us, tell us:
- Where the property is, with the postcode
- Pictures of the roof from a safe spot, if you have them
- Whether there’s a loft hatch, a shared roof or tricky access
- The type of building and roof, such as pitched or flat
We survey roofs on weekdays, Saturdays and Sundays. To arrange a day that suits you, ring 07833 053749 or email us.
When to book a survey in Thorney Island
Roofs covered with paving, ballast or planting hide the membrane. ELD can work on some covered roofs, depending on the build-up.
Here are some of the things we see often:
- Leaks that return after repairs
- Damp inside with no sign on the roof
- Leaks under green or ballasted roofs
- Punctures from foot traffic or tools
If you let a flat or house near Southbourne station, a flat roof over a rented flat is easy to forget until the tenant reports a leak.
Choosing a roof surveyor
- How they plan to inspect the roof safely
- What follow-up you get after the report
- Whether you get a written report with photos
- When you will get the report
Different roofs, different checks
Liquid-applied waterproofing
Liquid-applied coatings form a seamless layer but holes and thin areas can occur. Suitability for ELD depends on the system.
Bituminous membranes
Bituminous felt and modified bitumen membranes are common. The build-up decides which method will work.
Useful tips for Thorney Island property owners
Here are a few things we’d tell any owner, before and after a survey:
- Limit access to the roof
- Have roof specifications to hand
- Check new waterproofing before handover
- Act on new leaks promptly
Wet insulation may need attention after a leak. Your roofer can advise on that, and moisture readings can help.
Keep outlets and gutters on flat roofs clear. Standing water puts more pressure on any weak point.