Kent · London and the South East
Longfield Electronic Leak Detection
Get a clear view of the flat roof membrane at a property in Longfield from an independent roof surveyor. We visit on weekdays and at weekends.
- Leaks at pipes, outlets or fixings
- Breaches hidden under paving or planting
- New roofs to check before paving or planting
How it works
Where it’s relevant and can be reached safely, the loft space is checked as well as the outside. 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. Older rural homes like those around Longfield can have a main roof, lower lean-to roofs and outbuildings all joined together. We work round each section in turn, from the safest viewpoints, and anything we cannot see is noted.
- You tell us about the roof and where water is showing.
- The roof is assessed for suitability first.
- The test method is chosen to suit the roof.
- We test the roof and locate any breaches.
- A report with photos shows where each breach is.
Getting ready for the survey
- Jot down any questions you want answered
- Let us know about parking near the property
- Move anything stored under the loft hatch
Arrange a survey
A quick phone call is normally the easiest start: call 07833 053749 or send us an email and we’ll ask a few questions about the roof. You will have a price before anything is arranged.
Related advice
How electronic leak detection works in Longfield
Electronic leak detection works on many flat roof membranes, on homes, blocks and commercial buildings. It can be used to trace an existing leak or to test a new membrane before it’s covered. We quote for each roof based on its size and build-up. We can test on weekdays and at weekends when conditions allow. Tell us about your roof to find out more. Common reasons to book are stains far from any visible defect and leaks that return after repairs, on commercial flat roofs, liquid-applied waterproofing and green roofs.
In a village or hamlet like Longfield, flat roofs are usually on extensions, garages, outbuildings or barn conversions. The checks are the same as anywhere: the covering, the edges, the upstands and where water drains away. We simply plan the journey and access beforehand. Garages and outbuildings are easy to forget, so mention any you want included when you book.
Findings are set out part by part, from the coverings down to the gutters, each with a short note and a photograph. It records what’s sound as well as what isn’t.
- Location
- Longfield (DA3)
- Region
- Kent
- Cost
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- When we survey
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
Rented homes, blocks and businesses
Landlords and agents in Longfield book surveys as well as homeowners. A report with photos gives you a clear record of the flat roof membrane, useful for planning maintenance.
Buyers’ agents can book surveys on behalf of their clients. Reports are emailed, so they’re easy to pass on, photographs included.
Roof by roof
Inverted and paved roofs
A terrace or paved roof hides the waterproofing. Suitability depends on the layers.
Liquid-applied waterproofing
Liquid-applied coatings form a seamless layer, but can still have thin spots or holes. Whether ELD works depends on the coating and build-up.
Common roof problems in Longfield
Other trades on the roof can puncture the waterproofing. Fixings, equipment and foot traffic can leave small holes.
Typical things we’re asked to look at include:
- Leaks through a covered membrane
- A flat roof leak that cannot be traced
- Damp inside with no sign on the roof
- Breaches around outlets and penetrations
If you run a business near Bluewater, a flat roof over a business is out of sight and out of mind until it leaks.
Questions to ask before booking
- Is there a chance to talk the report through?
- Is VAT included in the price?
- What the survey won’t cover
- Which viewpoints they use to see the roof
Places near Longfield
More services for Longfield
Why get it checked now?
Leaks left running can wet the insulation and deck. Locating it early helps limit the damage. For an older or listed building in a place like Longfield, repairs may need matching materials and consent, so leaving a defect until it is urgent leaves less time to plan.
What a survey costs comes down to the roof itself: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Why book with us
- An independent look at the roof
- Professional indemnity and public liability insurance
- 5,000+ surveys completed
- Photos and a written report every time
Take a look at how roof surveys are priced or two real surveys.
Local flat roofs in Longfield
Cobham College, about 4 miles east, is one of the historic houses in the wider area around Longfield. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead, and a listed home or one in a conservation area may need consent for changes of material. Handmade clay tiles, including Kent peg tiles hung on pegs through two holes, are typical of older Kent buildings. Kent’s older buildings take in oast houses and timber-framed Wealden hall houses as well. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises.
For site and facilities teams at buildings like Longfield Academy, ponding and blocked outlets on a wide flat roof are worth catching before the next wet season. If you let a flat or house near Longfield station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Longfield is about 3 miles south-west of Northfleet, in Kent. Bookings from Longfield are handled just like any other: get in touch, agree the price and pick a day. Longfield is one of the places in Kent we cover. Maidstone is in our area too.
Every address in DA3 is within our area for electronic leak detection. We cover properties on Station Road, Main Road and Ightham Close. Close by, we survey roofs in Hartley (1 mile south), New Barn (1 mile east), Longfield Hill (1 mile south-east), New Ash Green (2 miles south) and Nash Street (2 miles east). Within a short drive, we also cover Maidstone (13 miles south-east), Dartford (5 miles north-west), Sevenoaks (10 miles south-west), Gravesend (4 miles north-east), Tonbridge (14 miles south) and Northfleet (3 miles north-east).
What’s near Longfield
In Longfield, that means homes and buildings near Railway Tavern, Hartley Primary Academy and Rectory Meadow and the streets around them. There’s a railway station in Longfield itself: Longfield station. Other landmarks nearby include Darent Valley Hospital (3.3 miles north-west) and Stone Castle (3.4 miles north). The countryside around Longfield includes Sawyers Lake.
Practical tips
Most of what helps is simple and safe from the ground. Our suggestions:
- Keep a note of leaks after rain
- Ask contractors to protect the membrane
- Test new membranes before covering them
- Clear flat roof outlets regularly
If we think the leak isn’t coming through the membrane, the report says so, so other causes can be checked.
Limit foot traffic on flat roofs. Feet and dropped tools are a common cause of holes.
FAQs for Longfield
Do you cover Longfield?
Yes, Longfield is one of the places we work. Every survey there gets the same written report with photos.
Is Longfield within the area you cover?
Yes, Longfield is covered. We survey roofs across London and the South East, and smaller places are part of that. Longer journeys are simply planned ahead of time.
What’s the price of ELD?
Each roof is quoted on its size and build-up. Tell us about the roof and where it leaks, and phone 07833 053749 or drop us an email for a quote.
Are you structural engineers?
No. We note visible signs such as sagging or deflection, but we don’t carry out calculations or give an engineer’s opinion. If we think you need an engineer, the report says so.
What happens after the survey?
We email you the written report with photos and recommendations. You can use it to talk to a seller, an insurer, a roofer or a managing agent, whichever applies.
How long have you been surveying roofs?
Over 5,000 surveys so far, over more than 20 years, and 98% of customers are satisfied.
What does electronic leak detection do?
It uses an electrical current to find breaches in a flat roof membrane. A breach lets the current through, which shows us where the hole is.