We carry out leak investigation and inspection in Sevenoaks and across the TN13 area. Some leaks are obvious; many aren't.

Is it time for leak investigation and inspection?
- The leak moves around or is intermittent
- You're not sure if it's a leak or condensation
- You need a written report for a landlord, insurer or builder
Common causes we find
More than one fault
Older lanterns often have two or three small failures.
Not the lantern
Sometimes the source is the flat roof, a parapet, a gutter or a wall above.
About Sevenoaks and the TN13 area
Sun and UV do more damage than rain on many lanterns here: brittle ridge caps, chalky finishes and hardened gaskets. They're cheap to replace before they let water in.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
From Maidstone to Sevenoaks is roughly 14 miles — all part of the Kent area we cover.
If you're just outside Sevenoaks, we also cover Tonbridge (6 miles), Swanley (9 miles), Tunbridge Wells (10 miles).
How much should it cost?
Guide price for leak investigation and inspection: £145–£295 ex VAT (£174–£354 inc VAT), per visit. Towers or scaffold, where needed, are priced into the quote. Your fixed price is confirmed in writing before any work starts.
Do you need permission in England?
In England, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations 2010, so we set out the route in writing first. Listed buildings need listed building consent from the local council for alterations, and conservation areas can have extra controls; like-for-like repairs are treated differently from changes, so check with the council's conservation officer first.
How does it work?
- Send photosWhatsApp or upload a few photos and tell us when it leaks.
- Guide priceWe reply with a guide price and whether a visit is needed.
- Fixed price in writingYou approve the price and the date before anything starts.
- Repair and testWe fix what's failed, water-test where it matters, and send photos.
Leak investigation and inspection in Sevenoaks: questions
Do you cover Sevenoaks?
Yes. We cover Sevenoaks, including the TN13 postcode area, as part of Kent. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
Do you need to visit to price leak investigation and inspection?
Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.
Is the visit cost deducted from the repair?
Ask when you book — we'll confirm in writing how the visit is charged if you go ahead with the repair.
Do you provide a report?
Yes, with photos and findings, which is useful for landlords, insurers and disputes with installers.
Other lantern repairs in Sevenoaks
- Roof lantern leak repairs in Sevenoaks
- Eaves beam and gutter repairs in Sevenoaks
- Misted glass unit replacement in Sevenoaks
- Condensation diagnosis and fixes in Sevenoaks
- uPVC roof lantern repairs in Sevenoaks
- Roof lantern respraying in Sevenoaks
Leak investigation and inspection near Sevenoaks
More about leak investigation and inspection · All roof lantern repairs in Sevenoaks