Greater London · London and the South East
Flat Roof Survey in Cannon Hill
Flat roof surveys in Cannon Hill from an independent, experienced roof surveyor. More than 20 years and over 5,000 surveys.
- Raised blisters across the surface
- Ponding water that doesn’t drain away
- Damaged trims at the roof edge
Flat roof survey in Cannon Hill: what you get
Standing water is one of the first things we look for on a flat roof. It can mean the falls were never right, an outlet is blocked or the deck has started to sag. We record where water sits, check the outlets and look for dips that suggest deflection. Where the deck may be a structural issue, our report says a structural engineer should look at it. Typical surveys look at signs of deflection in the roof deck and damaged trims at the roof edge, across felt flat roofs, single-ply membranes and EPDM rubber.
Offices, shops and blocks of flats across London often have large flat roofs with plant, rooflights and walkways. Every penetration and upstand is a place where a membrane can fail. For a building in Cannon Hill, access is agreed with whoever manages the roof before the visit. Plant bases, rooflights and cable entries are all places where water can get in.
We keep jargon out of it: if work is needed, the report says so clearly.
- Location
- Cannon Hill (SW20, SM4, KT3)
- Region
- Greater London
- Prices
- From £150 inc. VAT
- Your report
- Emailed report with photos and recommendations
- Appointments
- Weekdays, Saturdays and Sundays
- Cover
- PI and public liability insurance
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Useful tips for Cannon Hill property owners
A little preparation and a few simple habits help, both for the survey and for the roof itself. Some pointers:
- Clear roof outlets and gutters each autumn
- Limit foot traffic on the covering
- Keep clear of rooflights and fragile roof sheets
- Book a survey every few years
The report is emailed to you, ready to share with a roofer, the seller or a managing agent. It’s written in plain English, with a photograph of each defect, so others can follow it without going up to look.
Get splits, lifted seams and loose trims seen to while they’re small. Prompt repairs tend to add years to a flat roof.
Also near Cannon Hill
Other services in Cannon Hill
Local flat roofs in Cannon Hill
About 1.2 miles north-west lies Southside House, a reminder of how long the area around Cannon Hill has been built on. Older roofs in the wider area can hide decades of patch repairs, so the detail matters. Further from the centre, London’s housing takes in interwar semis with hipped roofs in clay or concrete tiles as well as slate-roofed terraces. Bay roofs, hip ridges and dormers from later loft conversions are the details that set these houses apart. Next to the main roofs there is usually a flat roof somewhere, whether on an extension, a garage or a commercial unit.
If your house is among the older ones in the streets near St James Merton, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof. If you run a business near Bentall Centre, flat roofs over shops and units are easy to forget until water comes through a ceiling.
Cannon Hill is about 1 mile north-west of Morden, in Greater London. Whether the building in Cannon Hill is a house, a flat or a commercial unit, the roof can be surveyed on a weekday or at the weekend. Across Greater London, we cover Cannon Hill and the places around it. We also survey roofs in London.
Every address in SW20, SM4 and KT3 is within our area for flat roof surveys, from the main roads to the quietest streets. If you need a flat roof survey at a property on Aylward Road, Camborne Road and Botsford Road or a nearby road, we can survey it. Close by, we survey roofs in Bushey Mead (1 mile north-west), Raynes Park (1 mile west), Wimbledon Chase (1 mile north), West Barnes (1 mile west) and Merton Park (1 mile north-east). Within a short drive, we also cover London (9 miles north-east), City of Westminster (8 miles north), Marylebone (9 miles north), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
Landmarks near Cannon Hill
Around Cannon Hill, our work takes us to homes and buildings near The Edward Rayne pub, Cannon Hill Common and Harris Academy Wimbledon, among other places. Cannon Hill’s nearest station is South Merton station, roughly 0.5 miles north-east of the centre. A little further out are St. Anthony's Hospital (1.5 miles south) and Wimbledon Museum (1.6 miles north). The countryside around Cannon Hill includes Cherry Wood and Henman Hill.
DIY checks: what’s safe
Look up at the roof after a storm, from the ground: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Don’t go up yourself.
During heavy rain, look at the gutters from the ground or a window. Water spilling over the edge can point to a blockage or a sagging run.
What happens on the day
We work from the outside in: outside views come first, then the roof space if there’s safe access. In total, it takes about one to two hours for most houses, and more on a big or complicated roof. In Cannon Hill, visits are available on weekdays and at weekends. London parking is often by permit or pay-and-display, so it’s useful to know what’s near you. Upstairs rooms at the back are useful too, as they frequently give the best view of a rear addition.
- First you give us the address, what the roof covers and any leaks you’ve noticed.
- The roof is inspected from safe viewpoints, and from the roof itself where that is safe.
- The covering, falls, upstands, outlets, edge trims and rooflights are checked and photographed.
- Inside, we look for damp and staining under the roof where there’s access.
- You get a written report with photographs and our recommendations.
Preparing for the visit
- Agree roof access with the managing agent if it’s shared
- Unlock side gates and any roof access doors
- Have any questions written down, so nothing gets missed
Getting a price
Our phone lines are open seven days a week, including Saturdays and Sundays. For a price or to book, call 07833 053749 or email us.
Advice
What we are asked to look at in Cannon Hill
Ponding keeps the covering wet and wears it faster. Blocked outlets, poor falls and a sagging deck are the usual causes. Leaves and silt from nearby trees can soon choke an outlet.
A survey can pick up problems like:
- Blocked or damaged outlets
- Cracked or split membrane
- Failed seals around rooflight kerbs
- Edge trims that have lifted or split
For landlords with property near South Merton station, the flat roof over a let home is worth a look before it becomes a tenant complaint.
Choosing a roof surveyor
- Is VAT included in the price?
- Whether the roof space is looked at, where there is one
- If they fly a drone, whether they hold a CAA Flyer ID and Operator ID
- What experience they bring
Questions from Cannon Hill
Do you cover Cannon Hill?
Yes. Our area covers London and South East England, and Cannon Hill is part of that. You can phone 07833 053749 or email us with the address and a few details, and we’ll talk through which survey suits.
Does a conservation area affect roof work in Cannon Hill?
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.
Can you survey any kind of flat roof?
Felt, mastic asphalt, EPDM rubber, GRP fibreglass and single-ply membranes are all part of the work. We record what the covering is and how it is holding up.
How long is the visit?
Expect it to take about 1–2 hours for most houses, and longer for a large or complex roof. The written report follows by email, on the timescale of your package.
How do I book a survey in Cannon Hill?
Just call 07833 053749 or send us an email with the address. After a few questions, we confirm the price and fix a day.
Can you survey a shared roof?
Yes, if the building owner or managing agent agrees access. On a shared roof we can only inspect the parts we are allowed to reach, and the report makes that clear.
How much is a survey?
Prices start from £150, including VAT. What you pay for your roof depends on its size, height, access and the package, and it’s agreed before booking.
Surveys for landlords and agents in Cannon Hill
We survey roofs for landlords and letting agents as well as householders. A written report with photos gives you a clear record of the flat roof.
If the property is let, the agent or a tenant can let us in, at a time agreed in advance. Surveys run seven days a week, which helps when tenants work during the week.
Why it is worth a survey now in Cannon Hill
Standing water on a flat roof rarely sorts itself out. Most often it means blocked outlets, poor falls or a deck that is dipping, and every wet spell adds to the wear. Finding the cause now keeps more options open. In Cannon Hill, as in much of London, water from a roof defect can reach a neighbour’s home as easily as yours: a blocked parapet gutter or slipped slate can let water into the flat below or the house next door. Dealing with it early is far less disruptive.
Every price we give includes VAT. Prices start from £150, including VAT. You’ll know the exact price before you book.
Why book with us
- Weekday and weekend surveys
- Drones and thermal imaging where it applies
- An independent view of the roof
- Packages from £150, inc. VAT
Take a look at how roof surveys are priced and two real surveys.