Greater London · London and the South East
Roof Leak Investigation in Thornton Heath
Get a clear view of the leaking roof at a property in Thornton Heath. We visit on weekdays and at weekends.
- A leak that comes and goes with the weather
- Water dripping from rafters or underlay
- Damp ceilings under a flat roof
Can I check my roof myself?
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.
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.
Roof leak investigation in Thornton Heath
Water is good at hiding where it gets in. Water often travels along timbers or underlay before it finds a way down, so the stain on your ceiling is seldom right under the hole. Our leak investigation traces it back, one likely route at a time. A repair aimed only at the stain can miss the cause entirely. Tracing the route first means any work can be aimed at the right place. We survey flat roof details, rooflights and dormers and lead flashings, and common reasons people get in touch are wet patches on loft insulation and water coming in around a roof light or dormer.
Many London homes are well over a century old and their roofs have been patched more than once. Insurers usually exclude wear and tear, so it is useful to know whether damage is old or new. A careful look in Thornton Heath tells the two apart where the evidence allows. A written record with photographs helps you explain what was found to whoever deals with it next.
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.
- Where
- Thornton Heath (CR7, SW16, SE25)
- Wider area
- Greater London
- Prices
- From £150 inc. VAT
- Your report
- Emailed report with photos and recommendations
- Survey days
- Monday to Sunday, daytime
- Insured
- PI and public liability insurance
- Phone
- 07833 053749
- Updated
- 27 October 2026
Why act early in Thornton Heath
Water damage grows the longer it’s left. Damp spreads into rafters, ceilings and insulation. Tracing it now means less to put right later. Work on a London roof is rarely simple to arrange, with parking, neighbours and access all to think about. That is a good reason to find problems early, while there is time to plan.
What a survey costs comes down to the roof itself: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. Roof leak investigation starts from £150, including VAT.
Why book us in Thornton Heath
- An independent view of the roof
- Prices that include VAT
- Plain-English reports with photos
- 5,000+ surveys completed
Read our cost guide and two real surveys.
What we look for on each type of roof
Parapet and box gutters
Parapet and box gutters sit behind walls or inside the roof. A blocked outlet sends water over the lining and into the building.
Chimney stacks
Chimneys let water in through pointing, flaunching, flashings and open pots. Each is looked at from every safe vantage point, and look for damp on the breast inside.
Tips from our surveys
Nothing here needs a ladder. A few suggestions:
- Do not climb onto the roof to look
- Move stored items away from the hatch
- Tell us about any past repairs to the roof
- Put a bucket under the drip and move valuables
Your report arrives by email, with photographs of what we found. It explains the likely entry point, the route the water takes and our recommendations. Basic reports come within 48 hours, Standard within 24 to 48 hours and Premium the same day.
Look at the roof from ground level after strong winds. Slipped slates, lifted ridge tiles and debris on the ground are signs to act on. Prompt repairs stop gaps turning into leaks.
What happens on the day
There isn’t much for you to do on the day. Point out anything you’ve noticed, like stains, drips or loose pieces, and we’ll take it from there. The survey itself takes about 1–2 hours for a house, and more on a big or complicated roof. Many London properties are flats or terraces with no side access, so rear slopes are viewed from windows, the loft or, where a flight is allowed, by drone. Mention any building rules, key holders or managing agents when you book.
- We start with what you’ve seen: where the stain is and when it gets worse.
- 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.
- We use moisture detection, and thermal imaging where it is useful.
- Your report sets out where the water is most likely getting in, with photos and recommendations.
Getting ready for the survey
- Mention any parking restrictions on your street
- For a flat or shared roof, check access with the freeholder or managing agent
- If you’re buying, check with the agent that we can get in
Arrange a survey
We confirm the price for your survey before booking, so you know the cost up front. Prices start from £150, including VAT. To book, phone 07833 053749 or send us an email.
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Roof leak investigations in Thornton Heath: local notes
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. Different coverings let water in at different points, which shapes where the search starts. Historic houses such as Kingswood House, about 2.4 miles north-east, show how far back building in the area around Thornton Heath goes. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and a listed home or one in a conservation area may need consent for changes of material.
If you own a rental within reach of Thornton Heath station, finding the cause of a leak fast keeps a tenant’s home dry and the work focused. Homes near green spaces such as Grangewood Park can get more leaves in their gutters in autumn. Take an older house close to Church of St Stephen: water on an older roof tends to find its way in at the lead, the valleys or the chimney.
Thornton Heath is about 7 miles south of London, in Greater London. We survey roofs in Thornton Heath and the surrounding area as part of our work across London and South East England. We cover towns and villages across Greater London, from the larger towns to small villages. Our London page covers surveys nearby.
Every address in CR7, SW16 and SE25 is covered for roof leak investigations. If you need a roof leak investigation at a property on Ena Road, Elm Road and Mayo Road or anywhere close by, we can survey it. Main roads around Thornton Heath include the A23 and A212, so getting to you is simple. Neighbouring places we cover for roof leak investigations include Norbury (1 mile north), Pollards Hill (1 mile north), Mitcham (2 miles west), Hackbridge (2 miles west) and Eastfields (2 miles west). Larger places within reach include London (7 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (8 miles north-west), St Pancras (9 miles north) and Shoreditch (9 miles north).
Around Thornton Heath
Typical jobs here are in homes near The Archbishop Lanfranc School, Prince George pub and Grangewood Park. Thornton Heath has its own railway station: Thornton Heath station. A little further out are Centrale Croydon (1.7 miles south) and Croydon University Hospital (0.7 miles south). For a walk, there’s Biggin Wood and Duppas Hill.
For landlords and managing agents
Buyers’ agents can book surveys on behalf of their clients. Reports are emailed, so they’re easy to pass on.
Landlords, agents and building managers in Thornton Heath and across Greater London can book any of our surveys. For a price for a let property or a block, call 07833 053749 or email us.
Your questions about roof leak investigations in Thornton Heath
Is parking a problem for a survey in Thornton Heath?
It can be, so it’s useful to let us know about permits, visitor bays or off-street space as you book. That way the visit can be planned around it.
Does a conservation area affect roof work in Thornton Heath?
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.
Do you use thermal imaging to find leaks?
We use thermal imaging where it helps, and it’s part of the Premium Survey. It picks up temperature patterns rather than water, so anything it suggests is checked with moisture readings.
Can you find a leak when it isn’t raining?
In most cases, yes. Damp materials can be found without rain. If a leak only appears in driving rain from one direction, we will tell you what we found and what’s most likely.
Does this replace a RICS home survey?
No. This is a survey of the roof only, so it’s not a RICS Level 2 or Level 3 survey. It can sit alongside a RICS survey if you want both.
Does someone need to be in?
That depends on the survey. For inside areas and the roof space, someone has to give us access.
How much is a survey?
Prices start from £150, including VAT. Our three packages are Basic from £150, Standard from £250 and Premium from £400, inc. VAT.