Replacement roof lanterns
Older lanterns, especially white uPVC ones with polycarbonate panels, discolour, leak and lose heat. Replacing the lantern on the existing kerb is often straightforward, and the difference in light and warmth is immediate.
Get a price for a replacement roof lantern
Send your kerb size and we will reply with a fixed written quote.
In short: Swap a tired, leaking or polycarbonate lantern for modern double glazing. Guide prices start from £1,295 including VAT, supply only.
Can a new lantern go on my old kerb?
Often, yes, if the kerb is sound, level and dry. Measure the outside of the existing kerb. If the new lantern is to the same external size, it may sit straight on after the old one is removed. If the kerb is rotten, out of square or too low, it should be rebuilt and the roof membrane re-dressed.
Do I need building regulations approval?
In England and Wales, replacing a rooflight in an existing home is generally building work that should meet the energy efficiency standards for replacement rooflights. Installers registered with a competent person scheme can self-certify; otherwise building control is involved. Your installer should explain which applies.
What does a replacement cost?
Guide prices below include VAT for the lantern. If you want us to fit it, removing the old lantern and fitting the new one to a sound kerb typically starts from £1,095 including VAT for an average size; repairs to the kerb or roof are extra and confirmed after a survey.
Replacement roof lantern prices by size
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1500 mm | 1.50 m² | £1,295–£1,495£1,079 ex VAT from | Configure |
| 1000 × 2000 mm | 2.00 m² | £1,495–£1,795£1,246 ex VAT from | Configure |
| 1500 × 2000 mm | 3.00 m² | £1,995–£2,295£1,662 ex VAT from | Configure |
| 1500 × 2500 mm | 3.75 m² | £2,295–£2,695£1,912 ex VAT from | Configure |
| 2000 × 3000 mm | 6.00 m² | £3,195–£3,695£2,662 ex VAT from | Configure |
| 2000 × 4000 mm | 8.00 m² | £4,095–£4,795£3,412 ex VAT from | Configure |
Guide prices include VAT at 20%, supply only, aluminium with self-cleaning double glazing in a stock colour. Your fixed price is confirmed in writing on your quote before you order.
What you get
- Replaces
- Old aluminium, uPVC or polycarbonate lanterns
- Kerb
- Reused if sound, level and to size
- Upgrade
- Double or triple glazing, solar control
- Compliance
- Replacement rooflights must meet energy standards
- Fitting
- Supply only, or ask us to quote
Three checks
- Measure the outside of the kerb, width then length, and check the diagonals. How to measure.
- Check the glazing allowance for your extension and whether you need planning permission. See building regulations and planning.
- Plan the lift. Your quote gives the approximate weight so your installer can plan access and lifting.
Replacement roof lanterns: common questions
My old lantern leaks. Is it the lantern or the roof?
Often the roof or kerb detailing. A survey or close inspection will tell. If the lantern is the problem, replacing it is usually better value than repairing old polycarbonate.
Can I replace polycarbonate panels with glass?
Usually not in the old frame: glass is much heavier than polycarbonate and the frame was not designed for it. Replacing the whole lantern is the safer route.
Will a new lantern be warmer?
A modern double glazed lantern with a thermally broken frame loses far less heat than polycarbonate.
How long does replacement take on site?
For a like-for-like swap on a sound kerb, often a day. Kerb or roof repairs add time.
Replacement roof lanterns by area
We deliver replacement roof lanterns across mainland Britain. Choose your area for local delivery and regulation notes.
England
- Bedfordshire
- Berkshire
- Bristol
- Buckinghamshire
- Cambridgeshire
- Cheshire
- Cornwall
- Cumbria
- Derbyshire
- Devon
- Dorset
- County Durham
- East Riding of Yorkshire
- East Sussex
- Essex
- Gloucestershire
- Greater London
- Greater Manchester
- Hampshire
- Herefordshire
- Hertfordshire
- Isle of Wight
- Kent
- Lancashire
- Leicestershire
- Lincolnshire
- Merseyside
- Norfolk
- North Yorkshire
- Northamptonshire
- Northumberland
- Nottinghamshire
- Oxfordshire
- Rutland
- Shropshire
- Somerset
- South Yorkshire
- Staffordshire
- Suffolk
- Surrey
- Tyne and Wear
- Warwickshire
- West Midlands
- West Sussex
- West Yorkshire
- Wiltshire
- Worcestershire
Wales
Scotland
- Aberdeen and Aberdeenshire
- Dundee and Angus
- Argyll and Bute
- Ayrshire
- Dumfries and Galloway
- Edinburgh and the Lothians
- Fife
- Forth Valley
- Greater Glasgow
- Highlands and Islands
- Lanarkshire
- Moray
- Perth and Kinross
- Scottish Borders