West Sussex · London and the South East
Electronic Leak Detection in Crosspost
Electronic leak detection to pinpoint holes in flat roof membranes in Crosspost, carried out by an experienced roof surveyor. Every survey comes with a written report and photos.
- Leaks under green or ballasted roofs
- Leaking laps in the waterproofing
- A flat roof leak that cannot be traced
Electronic leak detection for homes and businesses in Crosspost
ELD can be carried out in more than one way. Low-voltage methods usually need a wet roof surface and high-voltage methods need the membrane dry and exposed. Which one suits depends on the membrane and the layers of the roof and we explain which we will use. We’ll say if your roof does not suit either method before any testing starts. We are frequently asked to look into new membranes needing a check before handover and damp inside with no sign on the roof, on flat roof membranes, green roofs and liquid-applied waterproofing.
In a small place like Crosspost, a flat roof can stand in the open, which is hard on edges, upstands and joins in the covering. Felt roofs, which often last around 15–20 years, usually show it first. Rubber and GRP last longer, though trims and joints still need a look. On an exposed roof, the edges tend to go first.
We write the report in plain English, so it makes sense without any roofing background. Each point is backed by a photo where possible.
- Where
- Crosspost (RH17)
- Region
- West Sussex
- Price
- Quoted for your roof
- Report
- A written report with photos, by email
- Survey days
- Weekdays and weekends
- Insured
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
FAQs for Crosspost
How do I find out if my home in Crosspost is listed?
Historic England’s list shows listed buildings, and the local council can tell you about conservation areas. 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 Crosspost?
Yes, Crosspost is one of the places we work. The survey and report are the same in Crosspost as anywhere else.
How soon will I get the report?
That depends on the survey you book: Basic within 48 hours, Standard in 24–48 hours and Premium the same day. The report is emailed to you.
Can you survey at the weekend?
Surveys can be booked for any day of the week: Monday to Friday, Saturdays and Sundays. Tell us which days suit you when you book.
Do you test for asbestos?
No. Asbestos surveys and testing aren’t part of what we do. We flag materials that could contain asbestos, such as cement sheets or soffits on pre-2000 buildings, and recommend a specialist asbestos surveyor checks them before they’re disturbed.
Do you need to get into the loft?
Where it’s relevant to the survey and there is safe access, yes. Please clear anything stored under the hatch.
What do I do with the report?
You will receive the report by email, and you decide the next step: raise it with a seller, send it to an insurer, brief a roofer or share it with a managing agent.
What we cannot see
No survey can tell you everything, and it’s better to know them up front. Keep these in mind:
- The extent of water in the insulation
- Areas we cannot reach or that cannot be tested
- Leaks from walls, copings or rooflights
Not sure which survey suits your roof? You can call 07833 053749 or email us and we’ll tell you before you book. What a survey covers and doesn’t.
Roof types and parts we check
- Flat roof membranes
- Roof terraces and balconies
- Single-ply roofs
- Commercial flat roofs
- Green roofs
- Liquid-applied waterproofing
Signs you need electronic leak detection in Crosspost
Joints and laps in a membrane can fail over time. A gap that is hard to see can let water in long before anyone notices.
Problems we come across often include:
- Damage from equipment installers
- Leaks showing away from the breach
- Leaking laps in the waterproofing
- Leaks that return after repairs
For an older house near a landmark such as St Mary Magdalene's Church, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof.
Before booking anyone
- Whether the loft space is looked at, where there is one
- Their track record with similar roofs
- What’s outside the scope of the survey
- How long the report takes to arrive
Before and after the survey
Here are a few things we’d tell any owner, before and after a survey:
- Share any drawings of the roof
- Limit access to the roof
- Do not keep patching the same spot
- Test new membranes before covering them
Wet insulation may need attention after a leak. Your roofer can advise on that and other checks can help judge it.
Keep people off the flat roof unless they need to be there. Many breaches come from foot traffic.
What electronic leak detection looks like in Crosspost
Handmade clay tiles and tile-hung upper walls are typical of older Sussex houses. A few old Sussex buildings still carry heavy Horsham stone slabs. Next to the main roofs there is usually a flat roof somewhere, whether on an extension, a garage or a commercial unit. Ockenden Manor, about 3.1 miles north-east, is one of the historic houses in the wider area around Crosspost. 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 landlords with property near Wivelsfield station, a flat roof over a rented flat is easy to forget until the tenant reports a leak. Anyone responsible for a site like Bolney CofE Primary School will know that schools and public buildings often have big flat roofs, and their outlets and upstands need regular checks.
Crosspost is about 4 miles north-west of Burgess Hill, in West Sussex. We provide electronic leak detection for householders, landlords and businesses in Crosspost. Our area takes in places right across West Sussex, large and small. Crawley is in our area too.
Here we cover the RH17 postcode area for electronic leak detection. We cover properties on Cowfold Road and Chapel Road and the roads around them. Neighbouring places we cover for electronic leak detection include Bolney (1 mile north-east), Twineham Green (1 mile south), Twineham (2 miles south), Wineham (2 miles south-west) and Kent Street (2 miles west). Within a short drive, we also cover Crawley (9 miles north), Horsham (7 miles north-west), Worthing (14 miles south-west), Haywards Heath (5 miles east), Burgess Hill (4 miles south-east) and East Grinstead (13 miles north-east).
What’s near Crosspost
For rail, the closest station is Wivelsfield station, roughly 4.2 miles east. Other landmarks nearby include The Dene Hospital (2.5 miles south-east) and Cuckfield Museum (3.2 miles north-east). For a walk, there’s Blunts Wood and Paiges Meadow.
Landlords, agents and block managers in Crosspost
Freeholders and residents’ companies use a roof report to plan and budget, putting the urgent items at the top.
Buyers’ agents can book surveys on behalf of their clients. Reports are emailed, so they’re easy to pass on, photos included.
Places near Crosspost
Also in Crosspost
How it works
Expect us to ask a few questions before we start, about the roof’s history, any leaks and past repairs. Then the inspection itself takes as long as needed for the roof’s area and construction, which we set out in the quote. In a small place like Crosspost, access is usually the main thing to plan. Let us know about outbuildings, past repairs and any leaks you’ve noticed. Weekday and weekend visits are available.
- First, we confirm which roof areas are included.
- The surface is prepared for the chosen method.
- Testing runs across the agreed area.
- Each breach found is located and recorded.
- You receive the results to pass to your roofer.
Getting ready for the survey
- Point out any leaks or damp patches
- Gather any invoices or paperwork from past roof work
- If it is not your property yet, arrange access through the agent
Book a survey
Every survey is priced before it is booked, so you know the cost up front. We quote electronic leak detection for each roof, as the method and time depend on the roof. To book, call 07833 053749 or use the contact form.
Read more
What we look for on each type of roof
Liquid-applied waterproofing
Liquid-applied coatings form a seamless layer, but can still have thin spots or holes. Suitability for ELD depends on the system.
EPDM rubber roofs
Some EPDM membranes conduct electricity, which can rule out some methods. We will say if the test will not work.