Greater London · London and the South East
New Malden Roof Leak Investigation
Tracing where water is getting into your roof in New Malden, with drones and thermal imaging where they help. Get in touch for a price.
- Ceiling stains that grow after rain
- Water through the ceiling under a flat roof
- Staining where a gutter or parapet meets the wall
Different roofs, different checks
Parapet and box gutters
Linings, joints and outlets are inspected wherever it’s safe.
Lead flashings
Water from a failed flashing can travel down the wall or along a rafter. We check every flashing that could feed the stain.
Roof leak investigation in New Malden
We investigate roof leaks in New Malden and across London and South East England. Surveys are carried out on weekdays and at weekends. We look inside and out, at flashings, valleys, chimneys, gutters and flat roof details. You get a written report with photos and recommendations. If water is coming in now, catch it in a bucket and keep it away from lights and sockets, and then call 07833 053749 or email us. Common reasons to book are staining where a gutter or parapet meets the wall and wet patches on loft insulation, across rooflights and dormers, slate and tile slopes and flat roof details.
In London, leaks often start somewhere hidden: a butterfly roof’s central valley gutter, a parapet gutter, a chimney flashing or a flat roof over a back addition. Whether you are tracing a leak or recording storm damage in New Malden, those are among the first places to look. A hidden gutter that overflows can send water a long way before it shows.
The report doesn’t just list problems. For each finding, it explains what it is, why it matters and what we’d recommend, so you can plan your next steps.
- Location
- New Malden (KT3, KT1, SW20)
- Region
- Greater London
- Prices
- From £150 inc. VAT
- Reports
- A written report with photos, by email
- When we survey
- Weekdays, Saturdays and Sundays
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
What happens if roof problems are left?
Water damage grows the longer it’s left. Wet timbers start to decay, plaster softens and insulation stops working. Finding the source early keeps the damage down. A hidden valley or parapet gutter on a London house can hold water for weeks before anyone notices. When the stain finally shows, the damage underneath is frequently older than it looks.
Roof leak investigation starts from £150, including VAT. The final price depends on how big and how high the roof is, how it can safely be seen and which survey you book.
Why book us in New Malden
- Two decades and more of roof surveys
- Prices that include VAT
- Thermal imaging and drone inspection where they help
- More than 5,000 surveys completed
Take a look at what a roof survey costs and two real surveys.
New Malden: your questions answered
Does a conservation area affect roof work in New Malden?
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.
Is New Malden in the area you cover?
Yes. Our area covers London and South East England, and New Malden is part of that. Just ring 07833 053749 or email us and let us know about the property, and we will talk through which survey suits.
Is it a structural engineer’s report?
No. Our survey isn’t a structural engineer’s report. We’ll recommend an engineer if we see signs that call for one.
Do I need to be at home?
If the survey includes the loft or the inside of the building, someone needs to let us in. Access is agreed with you as you book.
What should I do before you arrive?
Make sure the loft can be reached. Have any photos of the leak ready, plus details of past repairs. Keep catching drips and keep water away from electrics.
Is this an asbestos survey?
No. We can flag materials that might contain asbestos, but confirming it is a job for a specialist asbestos surveyor. It may be present in buildings built or refurbished before 2000.
Do you carry professional indemnity insurance?
Every survey is covered by professional indemnity and public liability insurance.
What happens on the day
We work from the outside in: outside views come first, then the roof space if there’s safe access. All told, expect roughly 1–2 hours for most homes, though a hard-to-trace leak can take longer. From the street, a London terrace normally shows only its front slope or parapet, so in New Malden we work round the house, using the street, the windows, the loft and any safe vantage point behind it. If other people live in the building, tell us who can let us into the shared parts.
- You pick a Basic, Standard or Premium Survey.
- We agree a date, including weekends.
- The investigation works from the stain back to the roof.
- Where it is useful and included, we take moisture readings and use thermal imaging.
- You get photos, the likely cause and clear recommendations.
How to prepare
- Find any records of previous roof work
- Let us know about parking before the day
- Have keys ready for side gates, garages or roof access doors
Book a survey
Our price is from £150, including VAT. What you pay depends on the roof’s size, access and the package, so ring 07833 053749 or use the contact form with the details.
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For landlords and managing agents
Letting agents often book on a landlord’s behalf. Access is agreed with the tenant ahead of time.
Shared roofs need a little more planning: access has to be agreed with whoever owns or manages the building. Mention it when you get in touch and we will plan the survey around it.
What a roof leak investigation looks like in New Malden
Historic houses such as Southside House, about 1.6 miles north-east, show how far back building in the area around New Malden goes. Older homes in the wider area frequently have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and any change of roofing material on a listed home needs checking with the council first. 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. The covering and its details give the first clues when tracing where water is coming from.
If you run a business near Bentall Centre, finding where water is getting in quickly keeps disruption down. For landlords with property near New Malden station, a clear finding on where water gets in helps you brief a roofer right away. Take a building like Christ Church New Malden CofE Primary School: a leak through a large roof is frequently found some distance from where the water shows inside.
New Malden is about 3 miles south-west of Wimbledon, in Greater London. We carry out roof leak investigations in New Malden for houses, flats, blocks and commercial buildings. Our Greater London coverage includes New Malden. London is in our area too.
Here we cover the KT3, KT1 and SW20 postcode area for roof leak investigations. We cover properties on High Street, Ashcombe Square and Melrose Gardens and the roads around them. Being close to the B283, New Malden is simple for us to get to for roof leak investigations. Neighbouring places we cover for roof leak investigations include Motspur Park (1 mile north-east), West Barnes (1 mile east), Norbiton (1 mile north-west), Coombe (1 mile north) and Raynes Park (1 mile east). Within a short drive, we also cover London (10 miles north-east), City of Westminster (9 miles north-east), Marylebone (9 miles north-east), Kensington (7 miles north), St Pancras (11 miles north-east) and Shoreditch (12 miles north-east).
Near you in New Malden
We work in homes and buildings around Beverley Park, The Glasshouse pub and Holy Cross School. New Malden has its own railway station: New Malden station. Other landmarks nearby include Chessington Castle Hill (3.3 miles south) and Bentall Centre (1.9 miles west). Green spaces nearby include Rose Walk and Kingston Hill Road area.
What you can safely check yourself
During heavy rain, look at the gutters from the ground or a window. Overflowing water can point to a blockage or a sagging run.
After strong wind, take a look from the pavement or garden: pieces of tile or slate on the ground, a gap in the ridge or a lifted flashing are all worth noting. Leave anything above ground level to a survey.
Tips that help
From years of surveys, a few habits stand out as worth the effort:
- Do not climb onto the roof to look
- Mention any plumbing above the damp area
- Write down the wind direction and rain when it leaks
- Mention earlier attempts to fix the leak
Keep the report after the work is done. If the leak returns, it is a useful record of what was found, which makes the next step quicker.
Keep the roof space ventilated. Good airflow reduces condensation, which is often mistaken for a leak. Keep insulation clear of the eaves.