Hampshire · London and the South East
Electronic Leak Detection in Alverstoke
Find out what’s going on with the flat roof membrane before you decide what to do next. We carry out electronic leak detection in Alverstoke, with photographs and a clear written report.
- Leaks through a flat roof with no obvious cause
- Breaches around outlets and penetrations
- New roofs to check before paving or planting
Flat roofs in Alverstoke
Alverstoke lies within about 1 mile of the sea, and being near the sea means more wind and salt than a roof inland would face. Wind can catch loose edges and trims on a flat roof, and salt air is hard on metal trims, flashings and fixings. Thatch survives on some older buildings in Hampshire’s villages. Older houses in the South East often have slate or clay tile roofs, while many later estates have concrete tiles. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises.
If you let a flat or house near Portsmouth Harbour station, flat roofs on let property tend to be checked only when they fail, which is the costly way round. Take an older house close to The Little Church: the flat roofs on later extensions tend to wear out long before the main roof. Shop and office owners around Tricorn Centre may find that outlets and upstands on commercial flat roofs are the places to check before trouble starts.
Alverstoke is about 2 miles south of Gosport, in Hampshire. Roofs in Alverstoke get the same thorough look as anywhere else in Hampshire. We cover towns and villages across Hampshire.
We work across PO12 for electronic leak detection and the streets around it. If you need electronic leak detection at a property on The Lane, Fort Road and Church Road or a nearby road, we can survey it. Other places close to Alverstoke include Clayhall (1 mile east), Haslar (1 mile east), Privett (1 mile north-west), Portsmouth Point (2 miles north-east) and Portsea (2 miles north-east). Larger places within reach include Havant (9 miles north-east), Fareham (5 miles north), Horndean (11 miles north-east), Hedge End (12 miles north-west), Waterlooville (9 miles north-east) and Purbrook (8 miles north-east).
Local landmarks in Alverstoke
We work in homes and buildings around Bay House School and Village Home pub, among other places. The closest station to Alverstoke is Portsmouth Harbour station, roughly 2.1 miles north-east. A little further out are Tricorn Centre (3 miles north-east) and Gosport War Memorial Hospital (0.9 miles north). Not far away are West of the River Alver.
About our electronic leak detection in Alverstoke
Our ELD testing covers flat roofs in Alverstoke and the rest of London and South East England. Testing typically takes a time that depends on the size of the roof and how it’s built, which we set out in the quote. Electronic leak detection is quoted for your roof, because the method depends on the roof. The results come in a written report with photos. We are often asked to look into water coming in under a flat roof and leaks through a covered membrane, across green roofs, flat roof membranes and commercial flat roofs.
Older buildings in small places like Alverstoke may be listed or in a conservation area, which can shape what a new flat roof may look like. If you’re planning work, check with the council first. Knowing the roof’s condition is the starting point. Listed building consent is needed for changes that affect a listed building’s special interest.
The report is written in plain words, so you don’t need to be a roofer to follow it. Photographs show what each point refers to, with the urgent items made clear.
- Where
- Alverstoke (PO12)
- Wider area
- Hampshire
- Price
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- Survey days
- Weekdays and weekends
- Insured
- Professional indemnity and public liability
- Phone
- 07833 053749
- Page updated
- 27 October 2026
What this survey cannot tell you
Some things can’t be seen without opening up the roof, so a survey has limits:
- Water entering through details rather than the membrane
- Parts of the roof covered by fixed equipment
- How wet the insulation is
If you’re not sure which survey you need, phone 07833 053749 or use the contact form and we’ll give you a straight answer. What our survey covers.
What this survey covers
- Flat roof membranes
- Green roofs
- Commercial flat roofs
- Liquid-applied waterproofing
- Roof terraces and balconies
- Single-ply roofs
Practical tips
Nothing here needs a ladder. A few suggestions:
- Get leaks traced quickly
- Ask contractors to protect the membrane
- Limit access to the roof
- Keep a note of leaks after rain
If we think the leak is not coming through the membrane, the report says so, with a suggestion of what to check next.
Clear flat roof outlets regularly. Water that sits on the roof finds breaches faster.
What affects the price in Alverstoke
A few things affect what a survey costs:
- How many separate roofs there are, such as extensions, dormers and garages
- House, block, shop or office
- Any need for thermal images or a drone flight
- Height and safe access
What a survey costs comes down to the roof itself: its size, its height, how many sections it has and how it can be reached and seen safely. Electronic leak detection is quoted for your roof, because the method depends on the roof.
Booking your survey
These details help when you get in touch:
- Any deadline, such as an exchange date
- Pictures of the roof from a safe spot, if you have them
- Where water is showing inside, if it is
- How the loft is reached, if there is one
Photos help, if you have them. Take them safely from ground level or a window; never climb up to get a better view. To get started, phone 07833 053749 or send us an email.
For landlords and managing agents
Freeholders and residents’ companies use a roof report to plan and budget, with the most urgent items set out first.
Roof problems in a rented home affect tenants as well as the building. A survey shows what needs attention, so you can plan the work with less disruption.
Alverstoke questions
Do roofs near the sea, like those around Alverstoke, take more of a battering?
Places near the sea get more wind and more salt in the air than inland, and both are hard on roofs. Salt is hard on nails, clips and metal flashings, while strong wind lifts anything already loose.
How do I find out if my home in Alverstoke is listed?
The council and Historic England’s list are the places to check. Either can affect what roof work is allowed, so it is worth checking before planning any.
Can you find leaks on a covered flat roof?
In some cases. The layers on top and the build-up below decide it and parts may need to be lifted. We’ll discuss it before we quote.
How does ELD work?
A sound membrane blocks the test current, so wherever there is a hole, it passes through. That’s how we locate breaches you cannot see.
Is the repair part of the test?
No, our part is finding the breaches. Your roofer uses the report to target the repair.
What’s the best way to book?
To book, phone 07833 053749 or drop us an email and tell us the address and what you’d like to know. We will confirm the price and find a day that suits.
Which days do you carry out surveys?
Visits run seven days a week in the daytime, which suits people who work during the week. Let us know your preferred days as you book.
Also in Alverstoke
What we do, step by step
The aim of the visit is simple: to see as much of the flat roof membrane as can safely be seen and record it clearly. Everything we note and photograph goes into the written report. It usually takes longer on a large roof than a small one, with the construction of the roof playing a part too. Rural addresses near Alverstoke can be hard to find from a postcode alone, so a few directions are welcome. The visit itself is the same as anywhere else.
- First, you let us know about the roof build-up and where water is showing.
- The roof is assessed to see if electronic testing will work on it.
- The method depends on the membrane and what sits above and below it.
- The roof is tested and any breaches are located.
- You get a report showing where each breach is, for your roofer to repair.
Before we arrive
- For flats, check roof access has been agreed
- Have any questions written down, so nothing gets missed
- Have keys ready for side gates, garages or roof access doors
Getting a price
We confirm the price for the job before booking, so you know the cost up front. Electronic leak detection is quoted for your roof, because the method depends on the roof. For a price for your roof, call 07833 053749 or drop us an email.
Related advice
Roof by roof
Liquid-applied waterproofing
Testing a liquid-applied roof depends on what’s beneath the coating.
Inverted and paved roofs
A terrace or paved roof hides the waterproofing. Whether it can be tested depends on the build-up.