Greater London · London and the South East
Mitcham Electronic Leak Detection
Electronic leak detection in Mitcham, backed by more than 20 years’ experience. You get a clear report with photographs.
- Leaking laps in the waterproofing
- Waterproofing to test before it’s covered
- Damp inside with no sign on the roof
Electronic leak detection in Mitcham: what you get
ELD can be carried out in more than one way. Low-voltage testing is usually done with the surface wet and high-voltage methods need the membrane dry and exposed. Which one suits depends on the membrane and the layers of the roof and we explain which we will use. If neither method suits your roof, we will tell you at the outset. If you’re worried about leaking laps in the waterproofing and new membranes needing a check before handover, a survey will tell you what’s going on, whatever the roof.
Commercial and residential blocks across London often have big flat roofs with plant, rooflights and access walkways. Each pipe, upstand and fixing through the covering is a possible weak point. In Mitcham, roof access is agreed with the building manager or owner beforehand. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
You can share the report with anyone who needs it: your solicitor, the seller, your insurer, a roofer or the building’s managing agent.
- Where
- Mitcham (CR4, SW16, SM4)
- Wider area
- Greater London
- Prices
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- Appointments
- Monday to Sunday, daytime
- Insurance
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Checking the roof from ground level
During heavy rain, look at the gutters from the ground or a window. Water spilling over the edge can be a sign of a blockage or a gutter that has dropped.
Your own check is a good start, but it isn’t a survey. You won’t see flashings, valleys or the backs of chimneys properly from ground level.
Roof by roof
Single-ply membranes
Many offices and units have single-ply roofs. Laps and fixings are where holes often appear.
Inverted and paved roofs
Inverted roofs have the insulation on top of the waterproofing, which affects testing.
When you need someone else
Every survey has limits, and it’s better to know them up front. Keep these in mind:
- Moisture spread under the membrane
- Roofs whose membrane or build-up isn’t suitable
- Leaks from plumbing or windows
If in doubt, phone 07833 053749 or send us an email and we will point you to the right survey before booking. The full list of what we check.
Roofs we survey in Mitcham
- Green roofs
- Liquid-applied waterproofing
- Flat roof membranes
- Commercial flat roofs
- Single-ply roofs
- Roof terraces and balconies
Why act early in Mitcham
Cutting open a flat roof to find a leak can cause more damage. Electronic testing finds the hole first, so the repair can be targeted. Many older London roofs have only old felt under the slates, or no underlay at all, so once the slates or flashings let water past, little stops it reaching ceilings. Left unchecked, water soaks into timber and plaster and the damage spreads.
For a price for your roof in Mitcham, call 07833 053749 or email us and let us know about the roof. We will confirm the figure before booking.
Why book with us
- Over 5,000 surveys carried out
- Thermal imaging and drones used where they help
- Covered by professional indemnity and public liability insurance
- Every finding written up with photos
Read how roof surveys are priced and our case studies.
Nearby places to Mitcham
What else we do in Mitcham
Local flat roofs in Mitcham
In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. Next to the main roofs there’s usually a flat roof somewhere, whether on an extension, a garage or a commercial unit. With Southside House about 3.6 miles west, Mitcham sits in an area with a long building history. If you own one of the older houses, 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.
If you own a rental within reach of Mitcham Eastfields station, the flat roof over a let home is worth a look before it becomes a tenant complaint. If you look after a building such as St Thomas of Canterbury Catholic Primary School, schools and public buildings frequently have big flat roofs, and their outlets and upstands need regular checks. Mitcham is in London, so parking needs planning: let us know about parking bays, permits or a driveway as you book.
Mitcham is about 2 miles west of Thornton Heath, in Greater London. Mitcham is part of the area we cover as part of our work across London and the South East. Our Greater London coverage includes Mitcham. London is in our area too.
All of CR4, SW16 and SM4 is within our area for electronic leak detection. Streets in the area include Kings Road, Baker Lane and Manor Road. Nearby, we also carry out electronic leak detection in Hackbridge (1 mile north), Eastfields (1 mile north), Colliers Wood (1 mile north-west), Merton Abbey (2 miles north-west) and Furzedown (2 miles north). Larger places within reach include London (7 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (7 miles north), St Pancras (9 miles north) and Shoreditch (9 miles north).
Around Mitcham
Locally, jobs take us to homes and businesses close to The Archbishop Lanfranc School, St Mark's Church of England Academy and The White Lion of Mortimer pub, among other places. For rail, the closest station is Mitcham Eastfields station, about 0.5 miles north. Well-known places in the area include Wandle Industrial Museum (0.7 miles west) and Centrale Croydon (2.7 miles south-east). The countryside around Mitcham includes Duppas Hill and Cranmer Green.
Your questions about electronic leak detection in Mitcham
Can parking be tricky for a visit in Mitcham?
It can be, so it helps to let us know about permits, visitor bays or off-street space as you book. The visit is then planned around what’s available.
How do I find out if my home in Mitcham is listed?
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.
What’s the best way to book?
Simply call 07833 053749 or email us. After a few questions, we confirm the price and fix a day, weekday or weekend.
Which method do you use?
It depends on the membrane and the build-up. Low-voltage methods are usually carried out on a wet roof, while high-voltage testing needs a dry, exposed membrane.
Will I get photos?
Yes. We photograph the roof as we go, and the report uses them to show each finding alongside our recommendations.
What’s in the report?
It explains what we saw, what it means and what we’d suggest, with photographs throughout. It also says if any part of the roof couldn’t be seen safely.
Which days do you carry out surveys?
Visits run seven days a week in the daytime, which suits people who work during the week. Just say which days work for you.
Practical tips
You do not need to be a roofer to help. Here’s what helps most:
- Limit access to the roof
- Ask contractors to protect the membrane
- Do not keep patching the same spot
- Keep outlets clear of debris
Keep the report with the roof’s records. It is a dated record of the membrane’s condition.
Do not leave a flat roof leak running. The longer water gets in, the more insulation and decking can be affected.
The survey, step by step
On the day, we start by asking what you’ve noticed and what you want to find out. We then inspect everything that can be seen safely, using the ground, windows, the loft and a drone where it applies. Most surveys take longer on a large roof than a small one, and the build-up of the roof makes a difference too. In a London conversion, the way into the loft space is often from a communal landing or the top flat. If that applies to your building, it’s useful to agree access with the neighbours or the managing agent first. Otherwise, the visit in Mitcham runs like any other.
- 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.
- The report is sent for your roofer to act on.
Getting ready for the survey
- Have any questions written down, so nothing gets missed
- Unlock side gates and any roof access doors
- If it isn’t your property yet, arrange access through the agent
Getting a price
Photos help, if you have them. Pictures from the ground or a window are fine, and please don’t climb up for a closer look. To get started, ring 07833 053749 or send us an email.