Greater London · London and the South East
Barnet Roof Leak Investigation
An experienced roof surveyor for roof leak investigations in Barnet. More than 20 years and over 5,000 surveys across London and the South East.
- A leak that comes and goes with the weather
- Damp on a chimney breast
- Drips in the loft during heavy rain
Roof leak investigations for homes and businesses in Barnet
A leak that comes and goes can be the hardest to pin down. Driving rain from one direction, melting snow or a gutter that overflows in a downpour can all set it off. Notes on when it leaks, and what the weather was doing, help us and so do photos. We look for the clues it leaves behind, like tide marks, stained timbers and damp underlay. Moisture detection shows which materials are still damp. Typical surveys look at leaks below a flat extension roof and water dripping from rafters or underlay, across valleys and parapet gutters, chimney stacks and lead flashings.
In converted houses and blocks across London, water from a roof can run a long way before it shows on a ceiling, sometimes in a different flat from the one below the defect. Tracing it back matters, both for dealing with the cause and for any insurance claim. In Barnet, we inspect what we can reach safely and are given access to. It helps to know when the water appears and in what weather.
Findings are set out part by part, from the main slopes down to the gutters and outlets, each with a short note and a photograph. It records what’s sound as well as what is not.
- Place
- Barnet (EN5, EN4, N20, N11)
- Wider area
- Greater London
- Prices
- From £150 inc. VAT
- Reports
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Cover
- PI and public liability insurance
- Call
- 07833 053749
- Page updated
- 27 October 2026
Practical tips
Here are a few things we’d tell any owner:
- Mention earlier attempts to fix the leak
- Mention any plumbing above the damp area
- Make sure the loft is accessible
- Leave roof access to professionals
Standard includes a follow-up consultation to talk the findings through, and Premium includes an in-person consultation. It is a chance to ask about anything in the report.
After a downpour, look in the loft space with a torch, keeping to boarded areas. Look for drips, damp patches and stains on timbers. Photograph anything new.
Common questions in Barnet
Is Barnet in the area you cover?
We do. Every survey there gets the same written report with photographs.
Is my home in Barnet listed or in a conservation area?
Historic England’s list shows listed buildings, and the local council can tell you about conservation areas. Listed building consent is needed for changes that affect a listed building’s special interest, and conservation areas can limit changes of roofing material.
What insurance do you have?
We’re covered by professional indemnity and public liability insurance.
Do I have to be there for the survey?
That depends on the survey. For inside areas and the roof space, someone has to give us access, while outside access can be discussed as you book.
Can you find a leak when it isn’t raining?
Normally, 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.
Why isn’t the leak directly above the stain?
Water rarely drops straight down. It runs along rafters, battens or underlay before it drips, so the stain may be some distance from where it gets in. We follow the route back instead of guessing.
Could my leak actually be condensation?
It is a common question. A leak normally shows in one area and follows rain, while condensation is often widespread and worst on cold days. We tell you which it is most likely to be.
Wind, rain and roofs in Barnet
Outer London has lots of Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, often with hipped roofs in clay or concrete tiles. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. Each of these roof types has its own typical places for water to get in. The wider area around Barnet has a long history of building, with Wyllyotts Manor about 3.5 miles north. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead, and the council can say whether a home is in a conservation area.
For site and facilities teams at buildings such as Grasvenor Avenue Infant School, on a building that size, finding the source of a drip means looking well beyond the stain. If you own a rental within reach of New Barnet station, finding the cause of a leak fast keeps a tenant’s home dry and the work focused.
Barnet is about 9 miles east of Watford, in Greater London. We survey roofs in Barnet as part of our work across London and the South East. Across Greater London, we cover Barnet and the places around it. Our London page covers surveys nearby.
Roof leak investigations in EN5, EN4, N20 and N11 are booked the same way as anywhere else. Streets in the area include Station Road, High Street and Sambroke Square, all of which we cover. Barnet sits on or near the B193 and A1081. Close by, we survey roofs in Underhill (1 mile west), New Barnet (1 mile east), Monken Hadley (1 mile north-west), Hadley Wood (1 mile north-east) and Cockfosters (1 mile east). Within a short drive, we also cover London (11 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (9 miles south) and Shoreditch (10 miles south-east).
What’s near Barnet
We work in homes and buildings around Queen Elizabeth's Girls' School, The Railway Tavern and Highlands Gardens, among other places. The closest station to Barnet is New Barnet station, roughly 0.6 miles east of the centre. Nearby you will also find Barnet General Hospital (1.2 miles west) and Francis Skaryna Belarusian Library and Museum (2.1 miles south). For a walk, there is Darland's Lake and Greenhill Gardens.
How the survey works
Time on site depends on the size and shape of the roof; as a rough guide, the survey takes about one to two hours for a house, rising to roughly 3–4 hours on a commercial building. If you have questions on the day, just ask. London terraces rarely offer a view of the whole roof from one spot, so a visit in Barnet moves between viewpoints: the pavement, upstairs windows, the loft and any safe spot at the back. Shared stairs or a basement flat? Let us know who holds the keys.
- We start with your notes and photos of the leak.
- Inside, we check the stain and the ceiling around it.
- From the roof space, we trace the water’s route where there’s 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.
Getting ready for the survey
- Gather any invoices or paperwork from past roof work
- Make sure we can get to the back of the property
- Jot down any questions you want answered
Booking a survey
Booking is simple: just call 07833 053749 or use the contact form, let us know about the property and we will point you to the right survey. We confirm the price before anything is booked.
Related advice
Landlord and commercial surveys in Barnet
With a portfolio of properties, you can book surveys for several addresses. To arrange surveys for several addresses, call 07833 053749 or use the contact form.
Surveys can also be booked by buyers’ agents acting for a client. Reports are emailed, so they’re easy to pass on.
What affects the price in Barnet
Prices vary from roof to roof, and it comes down to:
- The type of building, from a house to a block or an office
- Height and safe access
- Basic, Standard or Premium
- How many separate roofs there are, like extensions, dormers and garages
Price depends partly on the package: Basic from £150, Standard from £250 or Premium from £400, all inc. VAT. The roof’s size, height and access matter as well.
Getting in touch
What helps most when you contact us:
- The style of property, from a terrace to a block
- How the loft is reached, if there is one
- Why you want a survey: buying, a leak, a storm or new work
- The property’s address and postcode
To get a price for roof leak investigations in Barnet, call 07833 053749 or use the contact form. A few details about the property and the roof help us price the survey accurately.
What we’re asked to look at in Barnet
When a slate slips or a tile cracks, the underlay takes the water. Ageing felt underlay eventually tears and lets water through, and very old roofs may have no underlay at all. Corroded nails, known as ‘nail fatigue’, are a frequent cause on slate roofs.
These are some of the problems a survey can pick up:
- Leaks at a dormer or roof window
- Damp on a chimney breast
- Water marks that spread in wet weather
- Staining where a gutter or parapet meets the wall
If you live near a park such as Highlands Gardens, or anywhere with mature trees, autumn leaves can block gutters and valleys, so outlets and downpipes are worth watching.
What to check before booking
- Is there a chance to talk the report through?
- How long the report takes to arrive
- What the report includes, and whether it has photographs
- Which limits apply to the survey
Places near Barnet
More services for Barnet
What we look for on each type of roof
Valleys
A valley takes the rain from both sides of the roof. Split lead, cracked linings or slipped tiles let water in.
Lead flashings
Some roofs have mortar where you’d expect lead. Fillets crack and pull away over time, and water runs down behind them.