Kent · London and the South East
Comp Electronic Leak Detection
Know where you stand with the flat roof membrane before you decide what to do next. We carry out electronic leak detection in Comp, with photos and a clear written report.
- Holes around roof penetrations
- Leaks showing away from the breach
- Leaks through a flat roof with no obvious cause
About our electronic leak detection in Comp
We carry out electronic leak detection on flat roofs in Comp and across London and the South East. Testing normally takes more time on a big roof than a small one, with the construction of the roof playing a part too. Every roof is quoted on its size and build-up. The results come in a written report with photos. If you’ve noticed leaking laps in the waterproofing and holes around roof penetrations, we can find out what’s behind it.
Older buildings in small places like Comp may be listed or in a conservation area, and that can affect how an extension roof or dormer is re-covered. If you are 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.
Most points in the report come with a picture, so you can see each defect rather than just read about it. If something couldn’t be seen safely, the report is clear about it.
- Place
- Comp (TN15)
- Wider area
- Kent
- Price
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- Survey days
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Call
- 07833 053749
- Last updated
- 27 October 2026
How it works
On the day, we begin with a quick chat about the roof and anything that is worrying you. After that, we check everything we can see safely. The survey usually takes a length of time set by the membrane area and the build-up, and we’ll give you a guide when quoting. Rural addresses near Comp can be hard to find from a postcode alone, so a few directions, or a note of a nearby landmark, help us arrive on time. After that, the survey runs as it would anywhere.
- We start with what you know about the roof and the leak.
- We check whether the membrane and build-up suit ELD.
- The test method is chosen to suit the roof.
- We test the roof and locate any breaches.
- You get a report with photos of each breach.
Before the survey
- Unlock side gates and any roof access doors
- Clear the way to the loft hatch
- Keep pets out of the way during the survey
Getting a price
Photos help, if you have them. Take them safely from ground level or a window. To get started, ring 07833 053749 or use the contact form.
Related advice
Flat roofs in Comp
Older houses across Kent frequently have handmade clay or peg tiles, and many have tile-hung walls. The county’s older buildings also include oast houses and timber-framed Wealden hall houses. Mixed in with those pitched roofs are lots of flat ones, over rear extensions, dormers, garages and shops. Historic houses such as Old Soar Manor, about 1.7 miles south-west, show how far back building in the area around Comp goes. If your home is one of the older ones, expect a mix of original materials and later repairs on the roof, and any change of roofing material on a listed home needs checking with the council first.
Landlords with a home close to Borough Green & Wrotham station may find that a flat roof over a rented flat is easy to forget until the tenant reports a leak. For an older house near a landmark such as Church of St Mary, flat-roofed rear additions and dormers added over the years are worth checking.
Comp is about 3 miles west of Kings Hill, in Kent. We survey roofs in Comp and the rest of Kent, as part of our work across London and South East England. Comp is one of the places in Kent where we work. We also survey roofs in Maidstone.
Every address in TN15 is within our area for electronic leak detection. Nearby, we also carry out electronic leak detection in Platt (1 mile north-west), Wrotham Heath (1 mile north-east), Crouch (1 mile south-west), Claygate Cross (1 mile south-west) and Borough Green (1 mile west). Further out, we also cover Maidstone (8 miles east), Dartford (12 miles north-west), Sevenoaks (7 miles west), Royal Tunbridge Wells (11 miles south), Gravesend (10 miles north) and Tonbridge (7 miles south-west).
Around Comp
Locally, jobs take us to homes and businesses close to The Blue Anchor pub and Wrotham School, among other places. The nearest railway station is Borough Green & Wrotham station, about 1.5 miles west. A little further out are Ightham Court (2.3 miles west) and Beechin Wood Archery Museum (within half a mile west).
Checking the roof from the ground
A lot can be seen from the ground. Binoculars help you spot slipped slates or tiles, gaps along the ridge and a leaning stack. Never climb onto the roof to look.
After heavy rain, check ceilings and the tops of walls for new stains. Take a photo and write down when you saw it, as it helps a surveyor trace the cause.
Before and after the survey
A survey works best with a little help from you, before and after. Some tips:
- Do not keep patching the same spot
- Clear flat roof outlets regularly
- Ask contractors to protect the membrane
- Keep a note of leaks after rain
If water has been getting in, insulation under the membrane may be wet. That’s something to discuss with your roofer and other checks can help judge it.
Clear flat roof outlets regularly. Standing water puts more pressure on any weak point.
Honest limits
Our findings are based on what we can see safely on the day, so there are some things a survey cannot cover:
- Fixing the holes we find
- Leaks from walls, copings or rooflights
- Some conductive membranes
Not sure which survey suits your roof? You can call 07833 053749 or use the contact form and we will tell you. The full list of what we check.
What we check
- Liquid-applied waterproofing
- Green roofs
- Commercial flat roofs
- Flat roof membranes
- Roof terraces and balconies
- Single-ply roofs
Nearby places to Comp
Also in Comp
Your questions about electronic leak detection in Comp
Will you come out to Comp?
Yes, Comp is covered. We cover the whole of London and South East England, and smaller places are part of that. Longer journeys are simply planned beforehand.
Does a conservation area affect roof work in Comp?
The council and Historic England’s list are the places to check. It’s worth checking before planning roof work, as both can affect what’s allowed.
Are you insured?
Every survey is covered by professional indemnity and public liability insurance.
What happens next?
The report comes by email, and what you do next is up to you: raise it with a seller, send it to an insurer, brief a roofer or share it with a managing agent.
Do you test for asbestos?
No. We can flag materials that might contain asbestos, but only a specialist asbestos surveyor can confirm it. Buildings built or refurbished before 2000 may contain it.
How fast do I get the report?
Each package has its own report time. Basic is within 48 hours, Standard is 24–48 hours and Premium is the same day. If you have a deadline, such as an exchange date, let us know as you book.
Can you give me structural calculations?
No. We point out what can be seen, such as sagging or deflection, but we do not carry out calculations or give an engineer’s opinion. Where an engineer is needed, we say so in the report.
Landlords, agents and block managers in Comp
Shared roofs need a little more planning: we need access agreed with the freeholder or managing agent. Let us know about it as you book and we will plan the visit with that in mind.
An agent can book and manage the survey for a landlord, with the report sent to whoever needs it. Access is agreed with the tenant beforehand.
Common roof problems in Comp
On a flat roof, water spreads under the waterproofing. The stain inside can be far from the hole, so tracing it by eye is difficult.
Problems we come across often include:
- Holes around roof penetrations
- Patched roofs that still leak
- Waterproofing to test before it’s covered
- Leaks under green or ballasted roofs
For site and facilities teams at buildings like Platt Church of England Voluntary Aided Primary School, large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly.
What to check before booking
- What happens after the report arrives
- Whether you get a written report with photos
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
- How they plan to inspect the roof safely