Greater London · London and the South East
Roof leak investigation in Merton, Greater London
A careful look at the leaking roof at your property in Merton, with photos and a written report.
- Leaks at a dormer or roof window
- Staining where a gutter or parapet meets the wall
- Damp underlay across a wide area
Checking the roof from the ground
A DIY look is useful, but it is not a survey. From the ground, valleys, flashings and the backs of chimneys are often out of sight.
Inside, the loft is a good place to look, with care. Take a torch and only step on boards or joists, checking for stains, damp wood or chinks of daylight.
How a roof leak investigation works in Merton
Some leaks only appear in certain weather. Driving rain from one direction, melting snow or a gutter that overflows in a downpour can all set it off. Telling us when it happens helps a lot, along with any photos you’ve taken. Even on a dry day, a leak usually leaves clues: stained timbers, tide marks and damp underlay. Moisture detection shows which materials are still damp. Common reasons to book are stains around a skylight and condensation that looks like a leak, across the roof space, slate and tile slopes and flat roof details.
London’s Victorian and Edwardian roofs have often been repaired many times. Telling wear from a one-off event matters, because insurers typically exclude wear and tear. That’s as true in Merton as anywhere in London. A written record with photographs helps you explain what was found to whoever deals with it next.
Findings are set out part by part, from the main slopes down to the gutters and outlets, with a note and a photo for each point. You will see the good as well as the bad.
- Place
- Merton (SW19)
- Wider area
- Greater London
- Price
- From £150 inc. VAT
- Reports
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Call
- 07833 053749
- Last updated
- 27 October 2026
When to book a survey in Merton
Slipped or missing slates and tiles let rain reach the underlay. Ageing felt underlay eventually tears and lets water through, while some very old roofs have nothing under the coverings. On slate roofs, slipping is often caused by corroded nails.
These are some of the problems a survey can pick up:
- Water dripping from rafters or underlay
- Ceiling stains that grow after rain
- Damp on a chimney breast
- Leaks that appear only in driving rain
Anyone responsible for a site like Merton Abbey Primary School will know that tracing a leak on a big roof starts with where the water appears and works back.
Questions to ask before booking
- Will they check the loft as well as the outside?
- Are they insured for the work?
- How soon the report will arrive
- Do they have a CAA Flyer ID and Operator ID for drone work?
Surveys for landlords and agents in Merton
Freeholders and residents’ companies use a roof report to plan and budget, putting the urgent items at the top.
Landlords, agents and building managers in Merton and across Greater London can book any of our surveys. For a price for a let property or a block, call 07833 053749 or drop us an email.
What a survey costs
All our prices include VAT. What changes the price is:
- Height and safe access
- Features like valleys, chimneys, dormers and parapets
- Commercial roofs and larger buildings
- Roof area
Price depends partly on the package: from £150 for Basic, £250 for Standard and £400 for Premium, with VAT included. Size, height and access can affect the price too.
Getting in touch
Getting the details right at the start saves time. Please include:
- Any marks or damp showing indoors
- Access details, such as a loft hatch or a shared roof
- Your timetable, such as an exchange date
- The reason for the survey, like buying, a leak or storm damage
If you are buying, it helps to book soon after your offer is accepted, so you have the findings in time to act on them before you exchange. For any other survey, just phone 07833 053749 or drop us an email when you are ready.
What happens if roof problems are left?
Water damage grows the longer it is left. Damp spreads into rafters, ceilings and insulation. Finding the source early keeps the damage down. Work on a London roof is rarely simple to arrange, with parking, neighbours and access all to think about. Knowing what’s needed early gives you time to plan it calmly.
Roof leak investigation starts from £150, including VAT. Packages run from Basic at £150 through Standard at £250 to Premium at £400, including VAT, and we can help you choose.
What you get with us
- Plain-English reports with photos
- Prices that include VAT
- More than 5,000 surveys completed
- Visits on any day of the week
Take a look at our cost guide or two real surveys.
Leaks and storm damage in Merton
About 1.8 miles west lies Southside House, a reminder of how long the area around Merton has been built on. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and a listed home or one in a conservation area may need consent for changes of material. Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, frequently with hipped roofs of clay or concrete tiles. Bay roofs, hip ridges and dormers from later loft conversions are the details that set these houses apart. Knowing the roof type helps narrow down where water may be getting in.
Living close to Wandle Park is pleasant, but mature trees mean leaves in gutters and valleys each autumn, so outlets and downpipes are worth watching. If you let a flat or house near Haydons Road station, tracing a leak quickly matters when a tenant is living with it.
Merton is about 1 mile south-east of Wimbledon, in Greater London. Merton is one of many places we visit across Greater London. Across Greater London, we cover Merton and the places around it. You can also see our page for London.
Postcode districts we cover here for roof leak investigations: SW19. We offer roof leak investigations to properties on High Path, Pincott Road and Hayward Close. Main roads around Merton include the A24, so getting to you is simple. We also cover the places around Merton: Merton Abbey (1 mile east), South Wimbledon (1 mile north-west), Colliers Wood (1 mile east), Tooting Bec (1 mile north-east) and Summerstown (1 mile north). We also work in nearby towns such as London (7 miles north-east), City of Westminster (7 miles north), Marylebone (7 miles north), Kensington (6 miles north), St Pancras (8 miles north) and Shoreditch (9 miles north-east).
Around Merton
We work in homes and buildings around The Nelson Arms, Wimbledon School of Art and Wandle Park, among other places. The closest station to Merton is Haydons Road station, roughly 0.8 miles north of the centre. Other landmarks nearby include Southside Wandsworth (2.8 miles north) and St George's Hospital (1.1 miles north-east). Green spaces nearby include Henman Hill and Merton Park Green Walks.
How the survey works
The aim of the visit is simple: to see as much of the leaking roof as can safely be seen and record it clearly. Everything we note and photograph goes into the written report. It usually takes between one and two hours for a house, while a commercial roof takes nearer three to four hours. In a London area like Merton, the main things to sort out are parking and access: tell us about permits, visitor bays or off-street space, which floor the property is on and how to get into the loft. We then look at everything that’s safely in view from ground level, windows, the loft and, where it’s safe, the roof itself.
- You let us know where the water shows and when it appears.
- We check the stain, the ceiling and the loft above it.
- We check the likely entry points outside, such as flashings, valleys, chimneys and gutters.
- Moisture readings and thermal imaging are used where they help.
- Your report sets out where the water is most likely getting in, with photos and recommendations.
How to prepare
- Clear the way to the loft hatch
- Let us know about any leaks, stains or damp patches you know of
- Buyers: confirm access with the estate agent or seller
Book a survey
When you’re ready to go ahead, ring 07833 053749 or email us. We’ll suggest a package, agree the price and find a date.
Related advice
FAQs for Merton
How do I find out if my home in Merton is listed?
Start with Historic England’s list for listing and your council for conservation areas. It’s worth checking before planning roof work, as both can affect what’s allowed.
Can parking be tricky for a visit in Merton?
It depends on the street. Where there are permit zones, a visitor permit or nearby pay-and-display bay works well.
How experienced are you?
We have been surveying roofs for over 20 years and have completed over 5,000 surveys across London and the South East.
What’s in the survey report?
It works through the roof part by part, in writing and with photos, and ends with what we recommend. The most urgent items are made clear.
Will you fly a drone over my roof?
Where it helps and the rules allow, yes. Our sub-250g drone is flown by a CAA-registered operator with a Flyer ID and Operator ID, and every flight depends on the airspace and the weather.
Why isn’t the leak directly above the stain?
Because water travels. It can follow a timber or the underlay a long way first, so the stain may be some distance from where it gets in. That’s why we trace the route rather than patching above the stain.
What does a roof survey cost?
Our price is from £150, including VAT. We confirm the price for the job before you book, and it depends on the roof’s size, access and the package you choose. For a price, ring 07833 053749 or send us an email.