Portsmouth · London and the South East
Cosham Electronic Leak Detection
An experienced roof surveyor for electronic leak detection in Cosham. Over 5,000 surveys and 20+ years behind us across London and South East England.
- Holes left by work on the roof
- Damp inside with no sign on the roof
- Water coming in under a flat roof
Why it’s worth a survey now in Cosham
ELD before paving, ballast or planting goes on is simpler. Once layers are added, finding a breach is harder. Around Cosham, leaves and moss in gutters lead to overflowing water and damp walls. Dealing with the cause is simple; drying out a wall is not.
For a price for your roof in Cosham, phone 07833 053749 or send us an email and let us know about the roof. We will confirm the figure before booking.
What you get with us
- Drone flown under a CAA Flyer ID and Operator ID
- Independent findings on the roof’s condition
- 20+ years’ experience
- Satisfaction rate of 98%
Read our cost guide and our case studies.
Electronic leak detection in Cosham: what you get
Green roofs, ballasted roofs and roofs under paving are harder to test. What sits on the membrane can affect which method will work and parts may need to be lifted. We will discuss it with you when we quote. Drawings or details of the roof’s layers are useful, as they show what lies beneath the surface. If testing is not possible, we will say so. Common reasons to book are gaps at membrane joints and damage from equipment installers, across liquid-applied waterproofing, single-ply roofs and roof terraces and balconies.
Around Cosham, many homes have a garden room, garage or outbuilding with a flat roof. They’re easy to forget, but water through a garage roof can spoil whatever is stored inside. If you want them looked at too, mention them when booking. Felt, rubber and GRP coverings on garages and outbuildings age in just the same way as the main roof’s.
It is not only a list of defects. For each finding, it explains what it is, why it matters and what we’d recommend.
- Place
- Cosham (PO6, PO3, PO2)
- Wider area
- Portsmouth
- Price
- Quoted for your roof
- Report
- Emailed report with photos and recommendations
- When we survey
- Weekdays and weekends
- Insured
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
What this survey cannot tell you
No survey can tell you everything, and we’d rather be clear about that before you book. Bear these in mind:
- The extent of water in the insulation
- Repairing the breaches (that is for your roofer)
- Areas we cannot reach or that can’t be tested
Not sure which survey suits your roof? You can call 07833 053749 or use the contact form and we’ll tell you before you book. What our survey covers.
What this survey covers
- Flat roof membranes
- Liquid-applied waterproofing
- Roof terraces and balconies
- Commercial flat roofs
- Green roofs
- Single-ply roofs
The survey, step by step
You don’t need to do much 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 longer on a large roof than a small one, and the build-up of the roof makes a difference too. A visit to a smaller place like Cosham is no different on the day: we look from the ground, from windows, from the loft and from the roof where it’s safe. Point out any stains, cracks or loose pieces you’ve spotted.
- We start with what you know about the roof and the leak.
- The roof is assessed for suitability first.
- We choose a low-voltage or high-voltage method to match the roof.
- The membrane is tested and breaches are found.
- You get a report with photos of each breach.
Getting ready for the survey
- If you are buying, let the agent know when we are coming
- Make sure we can get to the back of the property
- Check pets are kept safely away
Arrange a survey
Booking is simple: just ring 07833 053749 or send us an email, let us know about the property and we’ll point you to the right survey. The price is agreed up front.
Read more
Flat and commercial roofs around Cosham
The coast is about 1 mile or less from Cosham, and places near the sea get more salt in the air and more wind than inland. Salt in the air is hard on metal flashings and fixings, and wind catches any loose edge on a flat roof. A number of Hampshire villages keep thatched roofs on their older buildings. In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises.
If you let a flat or house near Cosham station, a flat roof over a rented flat is easy to forget until the tenant reports a leak. The streets around a church like Church of St Philip are often among the oldest in a place, and if your home is one of the older ones nearby, the joins between later flat roofs and the old walls are where problems normally start. Anyone responsible for a site like Court Lane Junior Academy will know that schools and public buildings often have big flat roofs, and their outlets and upstands need regular checks.
Cosham is about 2 miles south-west of Purbrook, in Portsmouth. We cover Cosham and the rest of Portsmouth, as part of our work across London and South East England. Our Portsmouth coverage includes Cosham and the places around it.
Electronic leak detection in PO6, PO3 and PO2 are booked the same way as anywhere else. We offer electronic leak detection to properties on Dean Road, Park Lane and Elgin Road and the roads around them. Being close to the A397, Cosham is easy for us to reach. We also cover the places around Cosham: Wymering (1 mile north-west), Hilsea (1 mile south), Drayton (1 mile east), Widley (1 mile north-east) and Paulsgrove (1 mile west). Further out, we also cover Southsea (4 miles south), Milton (3 miles south), Landport (3 miles south), Portsea (3 miles south-west), Portsmouth Point (4 miles south-west) and Fratton (3 miles south).
Local landmarks in Cosham
In Cosham, that means homes and buildings near The First Post pub, Alexandra Park and Springfield School and the streets around them. There’s a railway station in Cosham itself: Cosham station. Other landmarks nearby include Tricorn Centre (2.9 miles south) and World War I Remembrance Centre (1 mile south-east). Open spaces near Cosham include Southmoor Nature Reserve and Portsdown Hill.
What we look for on each type of roof
Green and ballasted roofs
Roofs with planting or ballast hide the membrane. Testing may still be possible but it depends on the layers.
EPDM rubber roofs
ELD on EPDM depends on the product and the layers. We check before we quote.
Also near Cosham
Also in Cosham
Your questions about electronic leak detection in Cosham
Is Cosham within the area you cover?
We do. A small place gets exactly the same survey as a big one, with the route planned beforehand.
Is the coastal weather around Cosham hard on roofs?
Near the coast, roofs face more wind and more salt than further inland. Salt corrodes metal fixings and flashings, and wind lifts loose slates, tiles and ridge pieces.
Does ELD work under paving or planting?
In some cases. The layers on top and the build-up below decide it, and some may need lifting. We’ll discuss it before we quote.
Will you walk on the roof?
Only when it’s safe. Most of what we need can be seen from safe viewpoints, the loft and, where applicable, a drone.
Do you test for asbestos?
No. We don’t sample or test for asbestos. Where a material might contain it, such as old cement sheets on a building from before 2000, the report flags it, with a recommendation to have a specialist asbestos surveyor check before it’s disturbed.
Can every flat roof be tested?
It depends on the membrane and the build-up. Share any details you have and we will check whether ELD will work.
Which days do you carry out surveys?
We survey on any day from Monday to Sunday, during the day. Let us know your preferred days when booking.
Checking the roof from ground level
After strong wind, take a look from the pavement or garden: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Leave anything above ground level to a survey.
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.
Tips that help
Most of what helps is simple and safe from ground level. A few suggestions:
- Make sure trades protect the waterproofing
- Test new membranes before covering them
- Keep foot traffic on flat roofs to a minimum
- Keep a note of leaks after rain
After your roofer repairs the breaches, a retest can confirm them, where the roof still suits the method.
Keep outlets and gutters on flat roofs clear. Water that sits on the roof finds breaches faster.