Greater London · London and the South East
Roof Leak Investigation in Friern Barnet
Tracing where water is getting into your roof across Friern Barnet, using drones and thermal imaging where it applies. Get in touch for a price.
- Damp underlay across a wide area
- Leaks at a dormer or roof window
- Damp patches next to the stack
Your questions about roof leak investigations in Friern Barnet
Is parking a problem for a survey in Friern Barnet?
It rarely stops a survey, but it is worth planning. Let us know what parking is available nearby, and the visit is planned around it.
Is my home in Friern Barnet listed or in a conservation area?
Start with Historic England’s list for listing and your council for conservation areas. Either can affect what roof work is allowed, so it’s worth checking before planning any.
What should I do before you arrive?
Clear the loft hatch so we can get into the roof space. Gather any photos and notes about when it leaks, plus details of past repairs. Keep catching drips and keep water away from electrics.
Will you definitely find the leak?
Not every leak can be pinned down in a single visit. Most leave clues we can follow, but intermittent leaks that need particular weather can be harder. We report what we found and the likeliest sources.
Is this a RICS survey?
No. It is a specialist roof survey, not a RICS Level 2 or Level 3 building survey. It focuses on the roof and can sit alongside a RICS survey.
Does the report include photos?
Yes. Photographs are taken throughout the survey, and they go into the written report.
Can you survey a shared roof?
Yes. A shared roof needs access agreed first, with whoever owns or manages the building. Mention it when you get in touch and we will explain what’s needed.
How a roof leak investigation works in Friern Barnet
We use moisture detection and thermal imaging where they help. Moisture readings show which materials are wet. A thermal camera shows patterns of temperature rather than water, so its findings are checked with moisture readings. Moisture detection is included in the Standard Survey, and thermal imaging in Premium. Thermal imaging works best after a sunny day, on a dry roof with little wind. We’re often asked to look into water through the ceiling under a flat roof and leaks at a dormer or roof window, across slate and tile slopes, lead flashings and rooflights and dormers.
In London, leaks frequently 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 Friern Barnet, those are among the first places to look. A hidden gutter that overflows can send water a long way before it shows.
It is not only a list of defects. For each finding, it explains what it is, why it matters and what we’d recommend.
- Location
- Friern Barnet (N11, N12, N10, N20)
- Region
- Greater London
- Price
- From £150 inc. VAT
- Reports
- Written, with photos, emailed to you
- Survey days
- Monday to Sunday, daytime
- Insured
- PI and public liability insurance
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
Checking the roof from ground level
What you cannot do safely is get up close. Slates, tiles, flat roofs and rooflights can give way, and a fall can be serious. That’s where a survey comes in, using safe viewpoints and a drone where applicable.
During heavy rain, look at the gutters from ground level or a window. Overflowing water can point to a blockage or a sagging run.
Nearby places to Friern Barnet
What else we do in Friern Barnet
What we are asked to look at in Friern Barnet
Slipped or missing slates and tiles let rain reach the underlay. Old bitumen felt may cope for a while, but it tears and sags with age, and very old roofs may have no underlay at all. On slate roofs, slipping is frequently caused by corroded nails.
A survey can pick up problems such as:
- Water dripping from rafters or underlay
- Damp patches next to the stack
- Ceiling stains that grow after rain
- Leaks below a flat extension roof
If you run a business near Grand Arcade, finding where water is getting in quickly keeps disruption down.
What to check before booking
- What insurance they carry
- What’s outside the scope of the survey
- Whether the price includes VAT
- When you will get the report
Friern Barnet roofs and the weather
In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. Hips, bay roofs and later loft conversions are typical of those semis, if your home is one of them. Different coverings let water in at different points, which shapes where the search starts. With Heath Hall about 2.7 miles south, Friern Barnet sits in an area with a long building history. Older homes in the wider area often have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and the council can say whether a home is in a conservation area.
If yours is one of the older homes in the streets near St John's Church, water on an older roof tends to find its way in at the lead, the valleys or the chimney. Trees in and around Friary Park shed leaves that can end up in nearby gutters, so outlets and downpipes are worth watching.
Friern Barnet is about 2 miles north-east of Finchley, in Greater London. We carry out roof leak investigations for householders, landlords and businesses in Friern Barnet and the surrounding area. We cover towns and villages across Greater London, large and small. For surveys nearby, see our London page.
We work across the N11, N12, N10 and N20 postcode area for roof leak investigations and the streets around it. We cover properties on Martock Gardens, Shapwick Close and Radstock Close. With the A406 and B550 close by, Friern Barnet is simple for us to get to for roof leak investigations. Other places close to Friern Barnet include New Southgate (1 mile east), Brunswick Park (1 mile north), North Finchley (1 mile west), Arnos Grove (1 mile east) and Whetstone (1 mile north-west). Within a short drive, we also cover London (8 miles south), City of Westminster (7 miles south), Marylebone (7 miles south), Kensington (8 miles south), St Pancras (6 miles south) and Shoreditch (7 miles south-east).
Near you in Friern Barnet
We work in homes and buildings around Francis Skaryna Belarusian Library and Museum, Friary Park and Friern Barnet School, among other places. Friern Barnet has its own railway station: New Southgate station. Nearby you’ll also find Francis Skaryna Belarusian Library and Museum (1.4 miles west) and Grand Arcade (1 mile west). The countryside around Friern Barnet includes Highgate Hill and Darland's Lake.
How we price roof leak investigations
To price your survey, we look at:
- Building height and the viewpoints available
- Extra roofs, like extensions, dormers or garages
- The shape of the roof and its details
- The package you choose: Basic, Standard or Premium
All our prices include VAT. Prices start from £150, including VAT. You’ll know the exact price before booking.
What we need to know
Here’s what helps us most when you get in touch:
- Dates you are working to, like exchange
- What kind of property and roof it is
- Pictures from the garden or a window, if you have them
- The address and postcode of the property
Every survey is priced before it’s booked, so you know where you stand. Roof leak investigation starts from £150, including VAT. To book, phone 07833 053749 or email us.
Why it is worth a survey now in Friern Barnet
Guesswork repairs are a common reason leaks keep coming back. Because water travels, the real entry point may be somewhere else. We find the probable source before anyone starts work, so the repair is aimed at the right place. Behind a London parapet, a blocked gutter can sit full of water without anyone seeing it. By the time a ceiling stains, the timbers underneath may have been wet for a while.
A small, low roof with good viewpoints takes less time than a tall, complicated one, and the package matters as well. The price is always agreed first.
Why book us in Friern Barnet
- Drone flown under a CAA Flyer ID and Operator ID
- 20+ years’ experience
- More than 5,000 surveys completed
- An independent view of the roof
What we do, step by step
We photograph the roof as we go, so the report shows exactly what we saw. We take close-ups from wherever is safe, including by drone where it is applicable and the weather allows. Most surveys take between one and two hours for most houses, and longer for a large or complex roof. London terraces rarely offer a view of the whole roof from one spot, so in Friern Barnet we work round the house, using the street, the windows, the loft and any safe vantage point behind it. Shared stairs or a basement flat? Tell us who holds the keys.
- You let us know where the water appears, when, and what the weather was doing.
- We examine the damp area and the rooms near it.
- From the roof space, we trace the water’s route where there is safe access.
- Outside, we check flashings, valleys, chimneys, gutters and flat roof details from each safe vantage point.
- We email a written report showing where the water most likely gets in.
Before the survey
- Let us know about parking near the property
- Jot down any questions you want answered
- For flats, check roof access has been agreed
Booking a survey
Not sure which survey you need? The easiest way is to ring 07833 053749 or send us an email and describe the roof and what’s worrying you. We will explain the options and the price.
Advice
Different roofs, different checks
Flat roof upstands and outlets
Flat roof water can travel under the covering before it shows. Where conditions allow, moisture readings and thermal imaging help narrow it down.
Chimney stacks
A stack has several possible ways in for rain. We check each one as far as we can safely see, and look for damp on the breast inside.