Oxfordshire · London and the South East
Electronic Leak Detection in Crowell Hill
Electronic leak detection to pinpoint holes in flat roof membranes in Crowell Hill. We’ve completed more than 5,000 surveys across London and South East England.
- Water coming in under a flat roof
- Damp inside with no sign on the roof
- Holes left by work on the roof
What happens on the day
Every visit follows the same pattern: we listen to what’s been worrying you, look at the roof from every safe viewpoint, take photographs as we go and record our findings for the written report. It usually takes longer on a large roof than a small one, and the build-up of the roof makes a difference too. In a hamlet or village like Crowell Hill, a postcode doesn’t always lead to the right gate, so a few directions are welcome. After that, the survey runs as it would anywhere.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- We confirm whether the roof is suitable for electronic testing.
- The testing method is chosen to suit the membrane and build-up.
- The roof is tested and any breaches are located.
- The breaches are recorded with photos in a report for your roofer.
Before the survey
- If you are buying, check with the agent that we can get in
- Gather any invoices or paperwork from past roof work
- Have keys ready for side gates, garages or roof access doors
Getting a price
Our phone lines are open seven days a week. For a price or to book, ring 07833 053749 or email us.
Advice
How electronic leak detection works in Crowell Hill
ELD suits many waterproofing membranes on flat roofs, on homes, blocks and commercial buildings. It helps trace a leak you already have or to test a new membrane before it is covered. We quote for each roof based on its size and build-up. We can test on weekdays and at weekends when conditions allow. Just ask about your roof. If you’re worried about repairs that haven’t stopped the leak and damp inside with no sign on the roof, we can find out what’s behind it.
Flat roofs on exposed homes in small places like Crowell Hill take more wind and rain, so edges, upstands and laps take a beating. Felt roofs, which frequently last around 15–20 years, normally show it first. EPDM rubber and GRP coverings last longer, but their edges and joints still need checking. On an exposed roof, the edges tend to go first.
After the visit, you get a report with photos, emailed to you. It sets out the condition of the flat roof membrane, any defects and our written recommendations.
- Place
- Crowell Hill (OX39)
- Region
- Oxfordshire
- Cost
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- When we survey
- Weekdays and weekends
- Cover
- PI and public liability insurance
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Before and after the survey
Some practical points come up on survey after survey. They’re worth knowing whatever the roof:
- Keep outlets clear of debris
- Get leaks traced quickly
- Note where leaks show inside and when
- Check new waterproofing before handover
After your roofer repairs the breaches, a retest can confirm them, where the roof still suits the method.
ELD before paving, ballast or planting goes on is worth considering. It’s easier to find holes before more layers are added.
What this survey cannot tell you
No survey can tell you everything, and it’s better to know them up front. Keep these in mind:
- How wet the insulation is
- Areas we can’t reach or that cannot be tested
- Water entering through details rather than the membrane
If you are not sure which survey you need, call 07833 053749 or send us an email and we will give you a straight answer. What a survey covers and doesn’t.
Roof types and parts we check
- Flat roof membranes
- Liquid-applied waterproofing
- Green roofs
- Single-ply roofs
- Roof terraces and balconies
- Commercial flat roofs
Landlords, agents and block managers in Crowell Hill
We survey roofs for letting agents and landlords as well as householders. The report gives you a dated record of the flat roof membrane, with photographs, useful for planning maintenance.
Managing agents and residents’ management companies use roof surveys to plan maintenance. Recommendations are set out by urgency where it matters, which helps with budgets and planning.
Can I check my roof myself?
Your own check is a good start, but it isn’t a survey. You will not see flashings, valleys or the backs of chimneys properly from the ground, and those are details a survey looks at closely.
Inside, the loft is a good place to look, with care. Use a torch and stay on the joists or boards, checking for stains, damp wood or chinks of daylight.
What a survey costs
The price reflects the time and kit the roof needs. That comes down to:
- Commercial roofs and larger buildings
- The number of roofs, including extensions and garages
- Any need for thermal images or a drone flight
- Features like valleys, chimneys, dormers and parapets
Larger roofs, taller buildings and commercial roofs take longer, so they’re priced to match. The price is confirmed before you book.
Booking your survey
We’ll typically ask about:
- The kind of building and roof involved
- Where water is showing inside, if it is
- What made you get in touch
- Pictures from the garden or a window, if you have them
Surveys can be booked for weekdays, Saturdays or Sundays. To find a date that works for you, call 07833 053749 or drop us an email.
Nearby places to Crowell Hill
Also in Crowell Hill
Questions from Crowell Hill
Will you come out to Crowell Hill?
We do. A small place gets exactly the same survey as a big one, with the route planned beforehand.
Does a conservation area affect roof work in Crowell Hill?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it’s 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.
How do you choose the testing method?
The method is chosen to suit the roof. Low-voltage methods are usually carried out on a wet roof and high-voltage methods need the membrane dry and exposed.
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.
Can every flat roof be tested?
It depends on the membrane and the build-up. Tell us what you know about the roof and we’ll check whether ELD will work.
Will you photograph what you find?
Yes. Photographs are part of every report, so you can see exactly what each finding refers to.
What insurance do you have?
We hold professional indemnity and public liability insurance, for every survey we carry out.
Flat roofs in Crowell Hill
West Oxfordshire’s older buildings often carry Cotswold stone slates, and a few villages in the county keep their thatch. Slate and clay tile are the usual coverings on older South East houses, with concrete tiles on many later estates. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere. The wider area around Crowell Hill has a long history of building, with Adwell House about 3.9 miles west. Older roofs in the wider area can hide decades of patch repairs, so the detail matters.
If you let a flat or house near Saunderton station, the flat roof over a let home is worth a look before it becomes a tenant complaint. If your house is among the older ones in the streets near Church of the Nativity of the Blessed Virgin Mary, flat-roofed rear additions and dormers added over the years are worth checking.
Crowell Hill is about 5 miles south-east of Thame, in Oxfordshire. Bookings from Crowell Hill are handled just like any other: get in touch, agree the price and pick a day. We cover towns and villages across Oxfordshire, large and small. For surveys nearby, see our Oxford page.
Every address in OX39 is within our area for electronic leak detection, from the main roads to the quietest streets. Other places close to Crowell Hill include Crowell (1 mile north-west), Kingston Blount (1 mile north-west), Oakley (1 mile north-west), Aston Rowant (2 miles west) and Lewknor (3 miles west). Further out, we also cover Oxford (15 miles west), Didcot (15 miles west), Thame (5 miles north-west), Henley-on-Thames (10 miles south), Benson (10 miles south-west) and Headington Quarry (14 miles north-west).
Around Crowell Hill
In Crowell Hill, that means homes and buildings near Sir Charles Napier Inn, among other places. Crowell Hill’s nearest station is Saunderton station, about 3.4 miles east of the centre. Nearby you will also find Thame Community Hospital (5.2 miles north-west). For a walk, there’s Oakley Hill nature reserve and Bald Hill.