Large roof lanterns in Whitehaven
Whether your Whitehaven extension is still on paper or the roof is already on, we can price a large roof lantern to suit it. Standard sizes cost less and arrive sooner; made-to-measure fits a kerb that is already built.
Price a large roof lantern for Whitehaven
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Whitehaven homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
Winter daylight in Whitehaven lasts about 7h 15m, against 17h 16m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Approximate weight given with your quote
- Intermediate rafters carry the larger glass
- Fitting can be quoted on request
Delivery and fitting in Whitehaven
Your quote includes delivery to Whitehaven at a confirmed price, usually to the kerbside or driveway on pallets.
Need it fitted? Send your postcode and we will confirm whether we have fitting cover in Whitehaven before quoting.
Delivery to CA28 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Whitehaven
Guide prices for common large roof lantern sizes, including VAT, supply only:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1500 × 3000 mm | 4.50 m² | £2,595–£2,995£2,162 ex VAT from | Configure |
| 2000 × 4000 mm | 8.00 m² | £4,095–£4,795£3,412 ex VAT from | Configure |
| 2500 × 4000 mm | 10.00 m² | £4,895–£5,695£4,079 ex VAT from | Configure |
| 3000 × 4000 mm | 12.00 m² | £5,695–£6,595£4,746 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.
Planning and building regulations for Whitehaven
For homes in England, a new or replacement rooflight should achieve a U-value of 2.2 W/m²K or better in the horizontal position, under Approved Document L.
Planning-wise, a lantern on a new extension is judged as part of that extension, while one added to an existing roof can fall outside permitted development if it stands more than 150 mm proud.
Building regulations in Whitehaven are checked by your local authority building control team or a registered building control approver. Replacing a rooflight in an existing home is building work. Installers registered with a competent person scheme can self-certify; otherwise building control must be involved.
Sources: Approved Document L, GOV.UK · Planning Portal
Questions from Whitehaven
Does a large lantern need structural calculations?
The roof structure around it usually does. Your engineer or building control body will want the lantern's weight and the opening size.
Do large lanterns overheat a room?
A large area of south-facing glass can make a room warm on sunny days. Solar-control glass, an opening vent and good background ventilation all help. Our guide on overheating explains the options.
Who checks building regulations for a lantern in Whitehaven?
Your local authority building control team or a registered building control approver. For a lantern in a new extension it forms part of the extension's approval; replacements in existing homes have their own rules.
Is it worth having solar-control glass in Whitehaven?
With the midsummer sun about 58.9° high at noon, roof glass in Whitehaven gets strong summer sun. Solar control is recommended for large or south-facing lanterns.