Greater London · London and the South East
Roof Leak Investigation in High Barnet
Find out the condition of the leaking roof at your property in High Barnet. Visits run on weekdays and weekends, in the daytime.
- Ceiling stains that grow after rain
- Wet patches on loft insulation
- Drips from nail tips in a cold loft
How a roof leak investigation works in High Barnet
On older houses, leaks frequently start at lead work and hidden gutters. Worn lead, tired valley linings and blocked parapet outlets are frequent causes. If your home has a butterfly roof, the central valley gutter is a common culprit. We check parapets, valleys and flashings from every safe viewpoint. Our report shows what we found, with photos. If you’ve noticed a leak that comes and goes with the weather and water marks that spread in wet weather, we can find out what’s behind it, on valleys and parapet gutters, rooflights and dormers and flat roof details alike.
Water getting into a London home often comes from a detail you cannot see from the street: a butterfly roof’s central valley gutter, a parapet gutter, a chimney flashing or a flat roof over a back addition. Whether you’re tracing a leak or recording storm damage in High Barnet, those are among the first places to look. Water from a hidden gutter can run along joists and show up a room or two away.
Report times depend on the survey you book: Basic within 48 hours, Standard in 24–48 hours and Premium the same day.
- Location
- High Barnet (EN5)
- Region
- Greater London
- Prices
- From £150 inc. VAT
- Report
- A written report with photos, by email
- Appointments
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
How we price roof leak investigations
When we price a survey, we consider:
- The roof’s overall size
- How tall the building is and how easy the roof is to see
- Extra roofs, like extensions, dormers or garages
- Any need for thermal images or a drone flight
Bigger, taller and commercial roofs take more time to survey, so the price reflects that. The price is confirmed before you book.
What we need to know
A little information up front helps. It is useful to include:
- The reason for the survey, like buying, a leak or storm damage
- Your postcode, so we can check access and travel
- How the loft is reached, if there is one
- Pictures of the roof from a safe spot, if you have them
Buyers should book once an offer has been accepted, so you have the findings in time to act on them before you exchange. For any other survey, just phone 07833 053749 or send us an email when you’re ready.
Why it is worth a survey now in High Barnet
Leaks tend to get worse, not better. Each storm can open a gap a little more. An investigation now gives you time to plan the work. A hidden valley or parapet gutter on a London house can hold water for weeks before anyone notices. By the time a ceiling stains, the timbers underneath may have been wet for a while.
Prices quoted always include VAT, and the report isn’t charged as an extra. Roof leak investigation starts from £150, including VAT. Size, height and access decide where your roof falls.
Why us?
- Surveys seven days a week
- Clear package prices, inc. VAT
- Two decades and more of roof surveys
- Plain-English reports with photos
Read what a roof survey costs or our case studies.
For landlords and managing agents
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 High Barnet and across Greater London can book any of our surveys. For a price for a let property or a block, ring 07833 053749 or drop us an email.
Nearby places to High Barnet
More services for High Barnet
Practical tips
Here are a few things we’d tell any owner:
- Note the weather when the leak shows
- Clear the loft hatch so we can get in
- Photograph the stain each time it appears
- Leave roof access to professionals
If the leak turns out to be condensation, the report says so, with recommendations on ventilation. That avoids roof work that wouldn’t help.
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.
Roof by roof
Slate and tile slopes
‘Nail fatigue’ is a common cause of slipped slates. One slipped slate can be enough to cause a leak, particularly in driving rain.
Flat roof upstands and outlets
Upstands seal the edge of a flat roof where it meets a wall. A low or cracked upstand is a common way in.
High Barnet: your questions answered
Will parking be an issue for a roof survey in High Barnet?
It rarely stops a survey, but it’s worth planning. Let us know the parking rules on your street and we will work around them.
Do you cover High Barnet?
Yes, High Barnet is within the area we cover. We cover the whole of London and South East England. Just call 07833 053749 or email us and tell us about the property, and we’ll talk through which survey suits.
Is there anything I need to do ahead of the visit?
Keep a note of when it leaks. Clear access to the loft. Keep away from any light or socket that water is reaching.
Is the repair included in the leak investigation?
A leak investigation finds and reports the likely source. The repair itself is a separate job. The report shows where the water gets in and what should be done.
Will I get photos?
Yes, plenty. Each finding is shown in a picture where possible, which makes the report easy to follow.
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. We will talk about access as you book.
Do you use thermal imaging to find leaks?
Where conditions suit, it can. The best results come after a sunny day, on a dry roof with little wind. Wet insulation holds heat longer than dry, which can show up on the image. We always check what it shows with moisture readings.
The survey, step by step
Before we start, let us know why you’ve booked: a purchase, a leak, a storm, new work or simply peace of mind. It helps us focus on what matters most to you. The visit typically takes about one to two hours for most homes, though a hard-to-trace leak can take longer. In converted houses and mansion blocks, the loft hatch is often on a shared landing. Where that’s the case, access needs agreeing with whoever controls that landing. Otherwise, the visit in High Barnet runs like any other.
- We start with your notes and photos of the leak.
- Inside, we look at the stain and the ceiling around it.
- In the loft, we follow any signs of water back towards the roof.
- We inspect the likely entry points outside, from the ground, windows and the roof where safe.
- We email a written report showing where the water most likely gets in.
How to prepare
- Unlock side gates and any roof access doors
- Agree roof access with the managing agent if it is shared
- Check the loft hatch can be reached
Booking a survey
You can call us seven days a week, including Saturdays and Sundays. To book or ask a question, ring 07833 053749 or email us.
Advice
Roof leak investigations in High Barnet: local notes
Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, often with hipped roofs of clay or concrete tiles. Hips, bay roofs and later loft conversions are typical of those semis, if your home is one of them. Where water gets in depends a good deal on what the roof is made of and how it is detailed. The wider area around High Barnet has a long history of building, with Wyllyotts Manor about 2.9 miles north. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and the council can say whether a home is in a conservation area.
The streets around a church such as Christ Church are often among the oldest in a place, and if you own one of the older houses nearby, the leak may come from a chimney, a valley or tired lead rather than the covering itself. Homes near green spaces such as King George's Fields (Monken Hadley) can get more leaves in their gutters in autumn, and blocked gutters overflow and soak walls. Take a building like Foulds School: water through a big roof can travel a long way before it drips, so the search covers more than the obvious spot.
High Barnet is about 1 mile north-west of Barnet, in Greater London. We carry out roof leak investigations for householders, landlords and businesses in High Barnet and the surrounding area. Across Greater London, we cover High Barnet. We also survey roofs in London.
Every address in EN5 is covered for roof leak investigations, from the main roads to the quietest streets. Streets in the area include Byng Road, Park Road and Kings Road, all of which we cover. High Barnet is on the A1081, which makes it simple to reach. If you are just outside High Barnet, we cover Hadley (1 mile east), Arkley (1 mile south-west), Kitts End (1 mile north), Totteridge (1 mile south) and Rowley Green (2 miles west). Further out, we also cover London (12 miles south-east), City of Westminster (10 miles south), Marylebone (10 miles south), Kensington (11 miles south), St Pancras (10 miles south-east) and Shoreditch (11 miles south-east).
What’s near High Barnet
Around High Barnet, our work takes us to homes and buildings near Susi Earnshaw Theatre School, The White Lion pub and Queen Elizabeth's School and the streets around them. The closest station to High Barnet is Hadley Wood station, roughly 1.6 miles north-east of the centre. Other landmarks nearby include Spires Shopping Centre (less than half a mile east) and Barnet General Hospital (0.5 miles south-west). Open spaces near High Barnet include Barnet Countryside Centre and Darland's Lake.