Essex · London and the South East
Electronic Leak Detection in Thornwood Common
A careful look at the flat roof membrane at your property in Thornwood Common, with photos and a written report.
- Breaches hidden under paving or planting
- Holes around roof penetrations
- Leaks through a flat roof with no obvious cause
Thornwood Common questions
Is Thornwood Common in the area you cover?
Yes. We survey roofs across London and the South East, and Thornwood Common is part of that. You can call 07833 053749 or drop us an email with the address and some details, and we’ll talk through which survey suits.
Is Thornwood Common within the area you cover?
Yes, smaller places are covered as well as towns. We work right across London and South East England. Just mention lanes, gates or anything else about the route as you book.
Can every flat roof be tested?
Not every roof is suitable. Certain membranes are conductive, and some build-ups lack a suitable layer below. If your roof will not work, we’ll say so before testing.
Do you climb onto every roof?
Only where it’s safe to do so. We look at everything that can be seen safely: from the ground, from windows, from inside the roof space, from the roof where it is safe and by drone where it applies. Anything we cannot see is noted in the report.
Is this a RICS survey?
No. Our survey is a roof survey, not a RICS Level 2 or Level 3 survey of the whole building. It focuses on the roof, so it sits alongside a building survey rather than replacing it.
Can you find leaks on a covered flat roof?
It can be possible, depending on the roof. What sits on the membrane affects the method, so we check the build-up first.
Do you test for asbestos?
No. We don’t sample or test for asbestos. The report may flag materials that could contain asbestos on buildings built or refurbished before 2000, with a recommendation to have a specialist asbestos surveyor check before it is disturbed.
How electronic leak detection works in Thornwood Common
Our ELD testing covers flat roofs in Thornwood Common and the rest of London and the South East. A visit typically takes longer on a large roof than a small one, and the build-up of the roof makes a difference too. Every roof is quoted on its size and build-up. The results come in a written report with photos. We’re often asked to look into breaches around outlets and penetrations and waterproofing to test before it’s covered, on flat roof membranes, single-ply roofs and green roofs.
Some older homes in villages like Thornwood Common are listed or in a conservation area, and that can affect how an extension roof or dormer is re-covered. 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.
The report is written in plain words, so it makes sense without any roofing background. Photos show what each point refers to, and recommendations are put with the most urgent first where relevant.
- Location
- Thornwood Common (CM16)
- Region
- Essex
- Price
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- Survey days
- Weekdays, Saturdays and Sundays
- Insured
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Why get it checked now?
Patching where you think the leak is frequently misses it. ELD shows the actual breach points. For an older or listed building in a place like Thornwood Common, repairs may need matching materials and consent, so a defect found early gives time to plan the work properly.
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. You will know the figure before booking.
What you get with us
- Covered by professional indemnity and public liability insurance
- More than 20 years surveying roofs
- Drones and thermal imaging where it applies
- Visits on any day of the week
Read what a roof survey costs and our case studies.
Nearby places to Thornwood Common
More services for Thornwood Common
How the survey changes by roof type
EPDM rubber roofs
EPDM is a long-lasting flat roof membrane, but punctures and seam failures still happen.
Inverted and paved roofs
Inverted roofs have the insulation on top of the waterproofing, which affects testing.
Signs you need electronic leak detection in Thornwood Common
A breach can be left during installation. ELD on a new roof can show holes before they cause leaks.
Things that often lead to a survey include:
- Patched roofs that still leak
- A flat roof leak that can’t be traced
- New roofs to check before paving or planting
- Leaks under green or ballasted roofs
If you look after a building like St John's Church of England Voluntary Controlled School, schools and public buildings frequently have big flat roofs, and their outlets and upstands need regular checks.
Choosing a roof surveyor
- Which parts of the roof they’ll actually see
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
- What’s outside the scope of the survey
- Whether they hold professional indemnity and public liability insurance
Electronic leak detection around Thornwood Common
Older buildings in Essex often have clay tiles and weatherboarding, and a good many post-war and modern estates besides. Next to the main roofs there is typically a flat roof somewhere, whether on an extension, a garage or a commercial unit. Hill Hall, about 3.3 miles south, is one of the historic houses in the wider area around Thornwood Common. If you own one of the older houses, expect a mix of original materials and later repairs on the roof, and the council can say whether a home is in a conservation area.
If you own a rental within reach of Harlow Town station, a flat roof over a rented flat is easy to forget until the tenant reports a leak.
Thornwood Common is about 3 miles south of Harlow, in Essex. Surveys in Thornwood Common work the same way as everywhere we cover: a close look at whatever is safely visible, photographs and a clear written report. Thornwood Common is one of the places in Essex we cover. We also survey roofs in Chelmsford.
Here we cover the CM16 postcode area for electronic leak detection. Streets in the area include Rowley Mead, Duck Lane and Weald Hall Lane. If you are just outside Thornwood Common, we cover Coopersale (1 mile south), North Weald Bassett (2 miles east), Hastingwood (2 miles north-east), Bush Fair (3 miles north) and Foster Street (3 miles north). Larger places within reach include Chelmsford (15 miles east), Harlow (3 miles north), Brentwood (10 miles south-east), Billericay (14 miles south-east), Loughton (6 miles south-west) and Waltham Abbey (6 miles south-west).
Landmarks near Thornwood Common
Around Thornwood Common, our work takes us to homes and buildings near Thornwood Common Flood Meadow. Thornwood Common’s nearest station is Harlow Town station, about 4.5 miles north. A little further out are Epping Signalling Museum (2 miles south) and St. Margaret's Hospital (1.1 miles south). Not far away are Gernon Bushes.
What we cannot see
Without opening up the roof, some things stay hidden, so a survey has limits:
- Carrying out the repair work
- Roofs whose membrane or build-up is not suitable
- Sections we cannot safely access
If you’re not sure which survey you need, call 07833 053749 or drop us an email and we will give you a straight answer before you book. The full list of what we check.
Roof types and parts we check
- Roof terraces and balconies
- Single-ply roofs
- Liquid-applied waterproofing
- Flat roof membranes
- Green roofs
- Commercial flat roofs
How it works
There is not much for you to do on the day. Show us any stains, drips or problem areas you know about, and we will get on with the inspection. A typical survey takes more time on a big roof than a small one, with the construction of the roof playing a part too. Older roofs in small places like Thornwood Common can have low, tight loft spaces, so it helps to know whether there is a loft hatch and how easy it is to reach. Only areas that can be reached safely are inspected.
- We agree the area to be tested.
- We get the roof ready for testing.
- Testing runs across the agreed area.
- Each breach found is located and recorded.
- You receive the results to pass to your roofer.
Preparing for the visit
- Have keys ready for side gates, garages or roof access doors
- Keep pets out of the way during the survey
- Show us where any leaks or stains appear
Arrange a survey
For a price for electronic leak detection in Thornwood Common, call 07833 053749 or use the contact form. The address, the type of property and what you need to know help us price the survey accurately.
Related advice
Prices for electronic leak detection in Thornwood Common
What a survey costs depends on the time and equipment it needs. The main factors are:
- The roof’s overall size
- Extra roofs, like extensions, dormers or garages
- Whether it is a home or a commercial building
- Features like valleys, chimneys, dormers and parapets
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 safely it can be seen. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Getting in touch
We will usually ask about:
- What made you get in touch
- Any stains, drips or damp patches you’ve seen indoors
- Anything about access we should know
- When you need the report by
To book a survey, phone 07833 053749 or use the contact form with the address and what you’d like to know about the roof. You’ll know the price before anything is booked.