In Thamesmead, as everywhere, some leaks are obvious; many aren't. Send photos and we'll tell you what we think has failed.

Signs you need leak investigation and inspection
- Previous repairs haven't stopped the leak
- The leak moves around or is intermittent
- You need a written report for a landlord, insurer or builder
Why it happens
Hidden water paths
Water can travel along bars, decks and linings before it shows.
Not the lantern
Sometimes the source is the flat roof, a parapet, a gutter or a wall above.
About Thamesmead and the SE28 area
Drier, sunnier parts of the UK are kinder to seals than the wet west, but strong sun ages sealant, gaskets and plastic end caps, and south- or west-facing lanterns can make rooms very warm. Solar control glass and an opening vent help.
London's extensions are often tight to neighbouring walls and roofs. Where a repair needs access over a neighbour's property, we'll tell you in advance so you can arrange it.
We cover Thamesmead as part of Greater London, about 11 miles from Westminster.
We also cover nearby Barking (3 miles), Welling (3 miles), Becontree (3 miles).
How much should it cost?
Typical range: £145–£295 ex VAT, which is £174–£354 with 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?
Most lantern repairs in England need no approval at all. Where a job turns into a replacement, the Building Regulations 2010 apply and we confirm how the work will be signed off before we start. 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 Thamesmead: questions
How do I get a price for leak investigation and inspection in Thamesmead?
Send a few photos of the lantern and the problem, with your Thamesmead postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Which places near Thamesmead do you cover?
As well as Thamesmead, we cover nearby Barking, Welling, Becontree, Dagenham and the rest of Greater London.
What does a leak investigation cost?
Visits start from £145 ex VAT, up to around £295 for larger lanterns or longer water tests. The cost and what's included are confirmed in writing before we visit.
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.
Other lantern repairs in Thamesmead
- Roof lantern resealing in Thamesmead
- Ridge and hip repairs in Thamesmead
- Flat roof junction and flashing repairs in Thamesmead
- Timber roof lantern repairs in Thamesmead
- Flat rooflight and skylight repairs in Thamesmead
- Orangery lantern repairs in Thamesmead
Leak investigation and inspection near Thamesmead
More about leak investigation and inspection · All roof lantern repairs in Thamesmead