West Sussex · London and the South East
Horsham Electronic Leak Detection
A careful look at the flat roof membrane at your property in Horsham, and put it all in a photo-illustrated written report.
- Stains far from any visible defect
- Holes around roof penetrations
- Leaks that return after repairs
Electronic leak detection for homes and businesses in Horsham
Not every flat roof suits electronic testing. Some membranes conduct electricity themselves and some roofs don’t have a suitable layer beneath the membrane. We’ll say if ELD will not work on your roof before any testing. Any details you have about the membrane and build-up help us decide, including drawings, specifications or the roofer’s paperwork. It avoids arranging a test that can’t give results. We’re often asked to look into holes around roof penetrations and water coming in under a flat roof, across single-ply roofs, commercial flat roofs and green roofs.
In a place like Horsham, purpose-built blocks of flats often have shared flat roofs, which managing agents, residents’ companies or owners have to keep watertight. A leak in the top-floor flat is often the first sign of a problem with the membrane. The earlier the cause is found, the less damage it does. Shared roofs need someone to arrange access, so let us know who manages the building.
Most points in the report come with a picture, so you can see each defect rather than just read about it. If something couldn’t be seen safely, the report is clear about it.
- Place
- Horsham (RH12, RH13, RH20, BN44)
- Region
- West Sussex
- Price
- Quoted for your roof
- Your report
- A written report with photos, by email
- Survey days
- Monday to Sunday, daytime
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
What we do, step by step
We look at 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. The whole visit usually takes longer on a large roof than a small one, and the build-up of the roof makes a difference too. In Horsham, we survey everything from flats and houses to commercial buildings. Each building type brings its own access questions, from shared stairwells to locked plant rooms. Surveys can be booked for any day of the week.
- First, we confirm which roof areas are included.
- The surface is prepared for the chosen method.
- We work across the roof with the test equipment.
- Each breach found is located and recorded.
- You receive the results to pass to your roofer.
Before we arrive
- Unlock side gates and any roof access doors
- Leave a clear route to the loft
- Tell us about any leaks, stains or damp patches you know of
Book a survey
Surveys can be booked for weekdays, Saturdays or Sundays. To find a date that works for you, ring 07833 053749 or send us an email with the address and the days you’d prefer.
Advice
Flat and commercial roofs around Horsham
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. Listing and conservation areas can both shape what roof work is allowed on an older home. The council is the place to check, along with Historic England’s list, before anyone quotes for re-roofing.
Landlords with a home close to Horsham station may find that a flat roof over a rented flat is easy to forget until the tenant reports a leak.
Horsham is about 31 miles south of London, in West Sussex. Horsham is part of the area we cover as part of our work across London and the South East. We cover towns and villages across West Sussex. You can also see our page for Crawley.
Postcode districts we cover here for electronic leak detection: RH12, RH13, RH20 and BN44. You’ll find streets such as Station Road, London Road and Market Square, all of which we cover. Main roads around Horsham include the A24 and A29, which makes travel easy. If you’re just outside Horsham, we cover Tower Hill (1 mile south-west), Broadbridge Heath (2 miles west), Holbrook (2 miles north), Warnham (2 miles north-west) and Southwater (3 miles south). We also work in nearby towns like Crawley (7 miles north-east), Haywards Heath (11 miles south-east), Burgess Hill (11 miles south-east), East Grinstead (14 miles east), Broadfield (5 miles east) and Storrington (11 miles south-west). Being one of West Sussex’s larger places, Horsham has every kind of building, from houses and flats to offices.
Local landmarks in Horsham
We work in homes and buildings around Millais School, Warnham Park and Kingslea Primary School and the streets around them. Horsham has its own railway station: Horsham station. Well-known places in the area include Christs Hospital School Museum (2.4 miles south-west) and Horsham Hospital (within half a mile north-west). Not far away are Warnham LNR.
Questions from Horsham
How do I find out if my home in Horsham is listed?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it is in a conservation area. If a home is listed, changes that affect its special interest need listed building consent, and in a conservation area re-roofing in different materials may need permission.
Do you cover Horsham?
Yes, Horsham is within the area we cover. We work right across London and South East England. Just call 07833 053749 or drop us an email and let us know about the property.
Does the report include photographs?
Yes. The report includes photographs of what we found, so you can see exactly what each finding refers to.
Does ELD work under paving or planting?
Sometimes. It depends on the build-up and the layers above the membrane, and some may need lifting. We will discuss it before we quote.
How long have you been surveying roofs?
We have been surveying roofs for over 20 years and have completed over 5,000 surveys across London and the South East.
Can you survey at the weekend?
We carry out surveys on weekdays and at weekends. To find a day that suits you, call 07833 053749 or send us an email.
Will you repair the leak?
No. ELD is testing only. The report shows where each breach is so your roofer can fix them.
DIY checks: what’s safe
Fresh stains on ceilings or walls after rain are worth noting. Photograph them and note the date, which helps when we look at the roof.
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.
Tips that help
Getting the most from electronic leak detection starts before we arrive and carries on afterwards. Tips:
- Ask contractors to protect the membrane
- Keep a note of leaks after rain
- Clear flat roof outlets regularly
- Stay off the flat roof unless needed
Keep the report with the roof’s records. It shows the condition of the membrane on that date.
Consider testing a new membrane before it’s covered. Finding breaches is simpler at that stage.
Also near Horsham
Other services in Horsham
What happens if roof problems are left?
Water trapped under a membrane can soak insulation and decking. Locating it early helps limit the damage. In commercial buildings and blocks around Horsham, water through the roof costs more than the repair itself. Planned work is far easier to manage than an emergency.
What a survey costs comes down to the roof itself: its size, its height, how many sections it has and how safely it can be seen. We quote electronic leak detection for each roof, as the method and time depend on the roof.
What you get with us
- Covered by professional indemnity and public liability insurance
- Weekday and weekend surveys
- Drone and thermal imaging surveys available
- 5,000+ surveys completed
Take a look at what a roof survey costs and our case studies.
Surveys for landlords and agents in Horsham
Shared roofs need a little more planning: access has to be agreed with whoever owns or manages the building. Mention it when you contact us and we will plan the visit with that in mind.
If the property is let, the agent or a tenant can let us in, at a time agreed ahead of time. Surveys run on weekdays, Saturdays and Sundays, which can make access easier.
When to book a survey in Horsham
Other trades on the roof can puncture the waterproofing. Fixings, equipment and foot traffic can leave small holes.
Signs worth acting on include:
- New membranes needing a check before handover
- Leaks through a flat roof with no obvious cause
- Gaps at membrane joints
- Breaches hidden under paving or planting
If you live in an older home near Hope Chapel, the joins between later flat roofs and the old walls are where problems normally start.
What to check before booking
- How they’ll see the roof: from ground level, the loft, the roof or by drone
- Whether you get a written report with photos
- What experience they bring
- What insurance they carry