Greater London · London and the South East
Electronic Leak Detection in St Mary Cray
Independent electronic leak detection in St Mary Cray. We have completed more than 5,000 surveys across London and South East England.
- Breaches around outlets and penetrations
- Leaking laps in the waterproofing
- Damage from equipment installers
Electronic leak detection in St Mary Cray
Electronic testing locates holes in the waterproofing, not every cause of water getting in. Water coming through walls, copings, rooflights or plumbing won’t show on the test. We will tell you if we think the leak is coming from somewhere else. It won’t show water getting in through brickwork or around frames. The report makes clear what was and wasn’t tested. You will also know what to check next. Typical surveys look at leaks that return after repairs and damage from equipment installers, across green roofs, roof terraces and balconies and flat roof membranes.
On a London roof terrace or a flat roof over a back addition, water often runs under the covering before it shows. Upstands against parapets, outlets and the edge where flat meets pitched are common entry points. In a block or conversion in St Mary Cray, the flat roof is frequently a shared part of the building.
Where we cannot see part of the flat roof membrane, the report says so. You’ll know exactly what was inspected and what wasn’t.
- Where
- St Mary Cray (BR5, BR6, BR7)
- Region
- Greater London
- Cost
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- Survey days
- Weekdays, Saturdays and Sundays
- Insured
- PI and public liability insurance
- Call
- 07833 053749
- Updated
- 27 October 2026
Can I check my roof myself?
Inside, the loft is a good place to look, with care. Use a torch and stay on the joists or boards, and look for staining, damp timber or daylight coming through.
After heavy rain, check ceilings and the tops of walls for new stains. Photograph them and note the date, as it helps a surveyor trace the cause.
Also near St Mary Cray
Other services in St Mary Cray
How the survey works
It helps to start with what’s prompted the survey: a purchase, a leak, a storm, new work or simply peace of mind. That way we can focus on what matters to you. The visit typically takes as long as needed for the roof’s area and construction, and we’ll give you a guide when quoting. London terraces rarely offer a view of the whole roof from one spot, so a visit in St Mary Cray moves between viewpoints: the pavement, upstairs windows, the loft and any safe spot at the back. Shared stairs or a basement flat? Let us know who holds the keys.
- 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.
- The report is sent for your roofer to act on.
Getting ready for the survey
- Make a note of anything you’d like us to look at
- If you are buying, let the agent know when we are coming
- For flats, check roof access has been agreed
Book a survey
We confirm the exact price before you book, so you know where you stand. Electronic leak detection is quoted for your roof, because the method depends on the roof. For a price for your roof, phone 07833 053749 or email us.
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St Mary Cray: your questions answered
Does a conservation area affect roof work in St Mary Cray?
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.
Is parking a problem for a survey in St Mary Cray?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Is it a structural engineer’s report?
No. We’re experienced roof surveyors, and visible signs like sagging are noted, but we do not provide calculations or an engineer’s opinion. If one is needed, the report says so.
What happens next?
You receive the written report by email, with photographs and recommendations. It is yours to share with a seller, insurer, roofer or managing agent, whichever applies.
Will you walk on the roof?
Not always. Some roofs are too steep or fragile to walk on safely. We use safe viewpoints, the loft space and a drone where it applies.
Do you cover St Mary Cray?
Yes. St Mary Cray is part of the area we cover.
What will the report tell me?
You get our findings in writing, part by part, with photos, finishing with recommendations. Points are put in order of urgency where relevant.
Surveys for landlords and agents in St Mary Cray
Letting agents can arrange access with tenants, at a time agreed ahead of time. We survey seven days a week, which can make access easier.
Managing agents and residents’ management companies use roof surveys to plan maintenance. Recommendations are set out by urgency where it matters, which helps when budgeting.
Tips from our surveys
Most of what helps is simple and safe from ground level. A few suggestions:
- Tell us about the membrane and build-up if you know it
- Act on new leaks promptly
- Keep a note of leaks after rain
- Check new waterproofing before handover
You receive a report showing where each breach was found, with photos. Pass it to your roofer to repair the breach points.
Keep people off the flat roof unless they need to be there. Many breaches come from foot traffic.
Electronic leak detection in St Mary Cray: local notes
Outer London has a good many Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, often with hipped roofs in clay or concrete tiles. If your home in St Mary Cray is one of them, bay roofs, hips and later dormers each have their own details. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises. About 3.8 miles west lies Bromley Palace, a reminder of how long the area around St Mary Cray has been built on. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and the council can say whether a home is in a conservation area.
If you look after a shop, office or commercial unit, for example near The Mall, a flat roof over a business is out of sight and out of mind until it leaks. Take an older house close to Church of St Mary: any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof. Anyone responsible for a site like Poverest Primary School will know that a large flat roof with plenty of outlets and rooflights has many places where a membrane can fail.
St Mary Cray is about 11 miles south-east of London, in Greater London. If you’re in St Mary Cray, booking works exactly as it does anywhere else: get in touch, agree the price and pick a day. We cover towns and villages across Greater London, large and small. There’s also a page for London.
Every address in BR5, BR6 and BR7 is covered for electronic leak detection, from the main roads to the quietest streets. Local streets include New Road, Kent Road and Park Road, and we cover them all. St Mary Cray sits on or near the A224. Other places close to St Mary Cray include Poverest (1 mile south-west), St Paul's Cray (1 mile north), Orpington (1 mile south), Derry Downs (1 mile south-east) and Kevington (1 mile east). Further out, we also cover London (11 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), Kensington (15 miles north-west), St Pancras (13 miles north-west) and Shoreditch (12 miles north-west).
Landmarks near St Mary Cray
Around St Mary Cray, our work takes us to homes and buildings near Harris Academy Orpington, The Blue Anchor Public House and Walsingham School. There’s a railway station in St Mary Cray itself: St Mary Cray station. Other landmarks nearby include London Borough of Bromley Museum (0.9 miles south) and Lullingstone Castle (4.5 miles south-east). Not far away are Summer Hill and The Warren.
Roof by roof
Single-ply membranes
Punctures from foot traffic and equipment are common on single-ply roofs. Testing helps find them.
Bituminous membranes
Bitumen roofs can often be tested electronically, depending on what’s below.
What affects the cost of electronic leak detection
Prices vary from roof to roof, for these reasons:
- The use of thermal imaging or a drone
- The height of the building and how the roof can safely be seen
- House, block, shop or office
- Extra roofs, like extensions, dormers or garages
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. The price is confirmed before booking.
What to let us know when you contact us
To price your survey accurately, we’ll ask about:
- The property’s address and postcode
- Pictures of the roof from a safe spot, if you have them
- Any stains, drips or damp patches you’ve seen indoors
- Any deadline, such as an exchange date
A quick phone call is usually the easiest start: call 07833 053749 or drop us an email and we will ask a few questions about the roof. The price is agreed before a date is set.