Hertfordshire · London and the South East
Roof Leak Investigation in Radlett
Tracing where water is getting into your roof in Radlett, using drones and thermal imaging where it applies. Call or email for a price.
- Leaks that appear only in driving rain
- Drips in the loft during heavy rain
- Ceiling stains that grow after rain
How a roof leak investigation works in Radlett
Most roof leaks start at a joint rather than the middle of a slope. Common entry points include chimney and wall flashings, valleys, parapet and box gutters, and the upstands and outlets on flat roofs. We check each likely route and we follow where the evidence leads. Chimneys, dormers and roof lights each add joints of their own. We check all of them, from every safe viewpoint. Typical surveys look at leaks below a flat extension roof and water marks that spread in wet weather, on lead flashings, chimney stacks and the roof space.
Around Radlett, chimneys on older homes are a common source of leaks, at the flashings, the pointing or the mortar round the pots. Damp on a chimney breast isn’t always rain from above, which is why it is worth tracing properly. The stack, its flashings and the loft space beside it are all worth checking.
With the Standard Survey, you also get moisture detection, a structural check and a follow-up consultation. The Premium Survey adds thermal imaging, drone inspection where it applies, structural analysis and an in-person consultation.
- Place
- Radlett (WD7)
- Region
- Hertfordshire
- Price
- From £150 inc. VAT
- Your report
- A written report with photos, by email
- Survey days
- Weekdays, Saturdays and Sundays
- Insurance
- PI and public liability insurance
- Call
- 07833 053749
- Updated
- 27 October 2026
What a survey costs
Every roof is different, so prices are confirmed before booking. These are the things that affect it:
- The shape of the roof and its details
- Building height and the viewpoints available
- The use of thermal imaging or a drone
- How big the roof is
Larger roofs, taller buildings and commercial roofs take longer, so they’re priced to match. The price is confirmed before you book.
Getting in touch
To price your survey accurately, we’ll ask about:
- Pictures from the garden or a window, if you have them
- The kind of building and roof involved
- Any deadline, like an exchange date
- Where water is showing inside, if it is
Most bookings start with a short call: call 07833 053749 or drop us an email. The price is agreed before a date is set.
How the survey works
We will ask a few questions first, about the roof’s history, any leaks and past repairs. Then the inspection itself takes roughly 1–2 hours on an ordinary house, though large, tall or awkward roofs take more time. Some parts of a survey depend on the weather, so a visit to Radlett is booked with the forecast in mind: the parts that need calm, dry weather are planned around it.
- 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.
Before the survey
- Let us know about any leaks, stains or damp patches you know of
- Jot down any questions you want answered
- Tell us about parking before the day
Arrange a survey
Surveys can be booked for weekdays, Saturdays or Sundays. To find a date that works for you, call 07833 053749 or email us with the address and the days you’d prefer.
Read more
Radlett roofs and the weather
In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile. Different coverings let water in at different points, which shapes where the search starts. About 3.3 miles west lies High Elms Manor, a reminder of how long the area around Radlett has been built on. 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.
Anyone responsible for a site like St John's Church of England Infant and Nursery School will know that a leak through a large roof is often found some distance from where the water shows inside. For an older house near a landmark such as St John, the leak may come from a chimney, a valley or tired lead rather than the covering itself. For landlords with property near Radlett station, tracing a leak quickly matters when a tenant is living with it.
Radlett is about 3 miles north-west of Borehamwood, in Hertfordshire. From houses to flats and shops in Radlett, we can survey the roof on a weekday or at the weekend. Radlett is one of the towns and villages in Hertfordshire we cover. London is in our area too.
Here we cover the WD7 postcode area for roof leak investigations. Streets in the area include Upper Station Road, Station Road and Barn Close, and we cover them all. Radlett sits on or near the B462 and A5183. Other places close to Radlett include Kemprow (1 mile west), Round Bush (1 mile south-west), Letchmore Heath (1 mile south-west), Aldenham (2 miles south-west) and Patchetts Green (2 miles south-west). Within a short drive, we also cover Watford (4 miles south-west), Hemel Hempstead (8 miles north-west), St Albans (5 miles north), Welwyn Garden City (10 miles north-east), Harpenden (9 miles north) and Hoddesdon (14 miles east).
Local landmarks in Radlett
Locally, jobs take us to homes and businesses close to The Cat And Fiddle Public House. Radlett has its own railway station: Radlett station. A little further out are Radlett and District Museum (under half a mile south-east) and Harlequin Centre (3.7 miles south-west). For a walk, there’s Verulamium Lake and Broad Colney Lakes.
What you can safely check yourself
Watch the gutters in a downpour, from a window or the ground. Overflowing water can be a sign of a blockage or a gutter that has dropped.
What you cannot do safely is get up close. Roofs are fragile and slippery, and a fall can be serious. That is where a survey comes in, using safe viewpoints and a drone where applicable.
Radlett: your questions answered
Is my home in Radlett listed or in a conservation area?
Check Historic England’s online list first, then ask the council about conservation areas and any Article 4 direction. The answer matters most when a change of material is on the cards.
Do you cover smaller places like Radlett?
We do. A small place gets exactly the same survey as a big one, with the route planned beforehand.
What’s the best way to book?
To book, phone 07833 053749 or email us and tell us the address and what you want to find out. We will confirm the price and agree a day with you.
What happens after the survey?
You receive the written report by email, with photographs and recommendations. It is yours to share with a seller, insurer, roofer or managing agent, whichever applies.
How many surveys have you done?
We have more than 20 years’ experience and have completed over 5,000 surveys across London and the South East.
I live in a flat. Can you survey the roof?
Yes, once whoever controls the roof agrees access. On a shared roof we can only inspect the parts we are allowed to reach.
Is thermal imaging part of a leak investigation?
Where conditions suit, it can. It works best after a sunny day, with a dry roof surface and 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.
Tips that help
Here are a few things we’d tell any owner, before and after a survey:
- Let us know what has already been tried
- Check the loft is accessible
- Mention any plumbing above the damp area
- Stay off ladders and the roof
Where we find more than one possible route, we say which is most likely and why. We say which items need prompt attention, so you know what to deal with first.
Look at the roof from the ground after strong winds. Slipped slates, lifted ridge tiles and debris on the ground are signs to act on. Small faults dealt with quickly rarely become leaks.
Places near Radlett
Also in Radlett
Landlords, agents and block managers in Radlett
Any of our surveys can be booked by landlords, agents and building managers in Radlett. To discuss a property or a block, call 07833 053749 or use the contact form.
For a freeholder or residents’ company, a roof report is a sound basis for a maintenance plan.
Leave it or get it looked at?
Water damage grows the longer it is left. Wet timbers start to decay, plaster softens and insulation stops working. Finding the source early keeps the damage down. In an older home around Radlett, water from a roof defect can get into timber and plaster, which is far harder to put right than the roof fault itself.
The cost of a survey depends on the roof: its size, its height, how many sections it has and how it can be reached and seen safely. Roof leak investigation starts from £150, including VAT.
Why choose Independent Roof Survey in Radlett
- 20+ years’ experience
- Prices that include VAT
- Professional indemnity and public liability insurance
- Drones and thermal imaging where applicable