Hertfordshire · London and the South East
Electronic Leak Detection in Great Offley
Electronic leak detection to pinpoint holes in flat roof membranes around Great Offley, with a written report you can act on. Book a weekday or weekend visit.
- Breaches hidden under paving or planting
- Stains far from any visible defect
- New roofs to check before paving or planting
About our electronic leak detection in Great Offley
Not every flat roof suits electronic testing. Some membranes conduct electricity themselves and some roofs do not have a suitable layer beneath the membrane. If your roof is not suitable, we’ll tell you at the start. Any details you have about the membrane and build-up help us decide, such as drawings or specifications. It avoids arranging a test that cannot give results. If you are worried about new roofs to check before paving or planting and leaks showing away from the breach, we can find out what’s behind it, whatever the roof.
In a village or hamlet like Great Offley, 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. The journey and access are planned beforehand. Garages and outbuildings are easy to forget, so mention any you want included as you book.
After the visit, you get a photo-illustrated written report, sent by email. It explains the condition of the flat roof membrane, the defects we found and what we recommend.
- Where
- Great Offley (SG5)
- Wider area
- Hertfordshire
- Price
- Quoted for your roof
- Reports
- Emailed report with photos and recommendations
- Survey days
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
Local flat roofs in Great Offley
England has around 10,000 conservation areas and about 500,000 listed buildings. Listed building consent is needed for changes that affect a listed building’s special interest, and conservation areas can limit changes of roofing material, so the council is the place to ask. Across the South East, older homes tend to have slate or clay tiles, and many later ones concrete tiles, with flat-roofed extensions, dormers and garages common everywhere. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere.
For landlords with property near Hitchin station, a flat roof over a rented flat is easy to forget until the tenant reports a leak. For an older house near a landmark like Church of St Mary Magdalene, flat-roofed rear additions and dormers added over the years are worth checking.
Great Offley is about 3 miles south-west of Hitchin, in Hertfordshire. We provide electronic leak detection for homes and businesses in Great Offley and the surrounding area. Across Hertfordshire, we cover Great Offley. You can also see our page for Milton Keynes.
Postcode districts we cover here for electronic leak detection: SG5. We offer electronic leak detection to properties on High Street, Garden Fields and John Hall Court. Neighbouring places we cover for electronic leak detection include The Flints (1 mile west), Temple End (2 miles east), Ley Green (2 miles south-east) and Pegsdon (2 miles north-west). Larger places within reach include Hemel Hempstead (13 miles south-west), Stevenage (7 miles east), St Albans (12 miles south), Welwyn Garden City (11 miles south-east), Harpenden (8 miles south) and Hitchin (3 miles north-east).
Local landmarks in Great Offley
Typical jobs here are in homes near The Bull Public House and the streets around them. For rail, the closest station is Hitchin station, roughly 3.7 miles north-east of the centre. Other landmarks nearby include Ravensburgh Castle (3.1 miles north-west) and Keech Hospice Care (4.2 miles west). The countryside around Great Offley includes Pegsdon Hills and Markham's Hill.
What happens on the day
The visit has one job: to look at the flat roof membrane as closely as is safe and record what we find. Notes and photographs go into the written report. It typically takes more time on a big roof than a small one, with the construction of the roof playing a part too. Somewhere like Great Offley needs a little journey planning: let us know about narrow lanes, gates, long drives and where we can park. On the day, we inspect whatever is safely visible, inside and out.
- We start by finding out what the roof is made of and where it leaks.
- The roof is assessed to see if electronic testing will work on it.
- The testing method is chosen to suit the membrane and build-up.
- The roof is tested and any breaches are located.
- You get a report showing where each breach is, for your roofer to repair.
Before the survey
- Point out any leaks or damp patches
- Mention any parking restrictions on your street
- Gather any invoices or paperwork from past roof work
How to book
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, phone 07833 053749 or drop us an email.
Related advice
Rented homes, blocks and businesses
Businesses and commercial landlords can book us too, including offices, shops and units. Larger roofs take longer, and they’re priced for the size.
Letting agents can arrange access with tenants. We survey on weekdays and at weekends, which helps when tenants work during the week.
What we cannot see
Every survey has limits, and we’d rather be clear about that before you book. Keep these in mind:
- Repairing the breaches (that is for your roofer)
- Some conductive membranes
- The extent of water in the insulation
Not sure which survey suits your roof? You can call 07833 053749 or use the contact form and we will tell you. What our survey covers.
What we check
- Commercial flat roofs
- Single-ply roofs
- Liquid-applied waterproofing
- Roof terraces and balconies
- Flat roof membranes
- Green roofs
Leave it or get it looked at?
ELD before paving, ballast or planting goes on is simpler. Covered roofs are harder to test. Older cottages and farmhouses around Great Offley can have roof timbers that have been there a very long time, and water through a failed covering can rot timber if it’s left.
For a price for your roof in Great Offley, ring 07833 053749 or email us and tell us about the roof. We will confirm the figure before booking.
Why book with us
- Covered by professional indemnity and public liability insurance
- Satisfaction rate of 98%
- A photo-illustrated written report
- Thermal imaging and drone inspection where they help
Read our cost guide or our case studies.
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. Whether ELD works depends on the coating and build-up.
Single-ply membranes
Many offices and units have single-ply roofs. Laps and fixings are where holes often appear.
Places near Great Offley
Other services in Great Offley
Your questions about electronic leak detection in Great Offley
Will you come out to Great Offley?
Yes. Great Offley is within the area we cover, which takes in towns, villages and rural addresses. We work right across London and South East England. Let us know about access, parking and anything unusual about getting there when booking.
How do I find out if my home in Great Offley is listed?
For listing, use Historic England’s list; for conservation areas, ask the council. It matters most if you are planning to re-roof in a different material.
Do I have to be there for the survey?
If the survey includes the loft or the inside of the building, someone needs to let us in. We’ll talk about access when booking.
Will I get photos?
Yes, plenty. Each finding is shown in a picture where possible, so you can see what we mean.
Are you insured?
Our cover is professional indemnity plus public liability.
Does ELD work under paving or planting?
Sometimes. It depends on the build-up and the layers above the membrane and parts may need to be lifted. We talk this through first.
How do I arrange electronic leak detection in Great Offley?
The quickest way is to ring 07833 053749 or drop us an email. Let us know the address and a little about the roof, and we will take it from there. Surveys run on any day of the week.
When to book a survey in Great Offley
When the membrane is buried, holes can’t be seen at all. ELD can work on some covered roofs though it depends on the layers.
Common reasons to book include:
- Repairs that haven’t stopped the leak
- Leaking laps in the waterproofing
- Leaks through a covered membrane
- Stains far from any visible defect
For site and facilities teams at buildings such as Offley Endowed Primary School, large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly.
Questions to ask before booking
- How they’ll see the roof: from the ground, the loft, the roof or by drone
- Will the report include photos?
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
- Whether they hold professional indemnity and public liability insurance