Large roof lanterns in Windsor
Buy large roof lanterns for homes in Windsor and across Berkshire. Choose a standard size or have one made to your kerb, see a guide price straight away, then get a fixed written quote with delivery to your SL4 address.
Price a large roof lantern for Windsor
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Windsor homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
In midsummer the noon sun stands about 62.0° high over Windsor, so roof glazing gets the full strength of it. That is why solar-control glass is worth considering on larger lanterns here.
- Solar-control glass recommended
- Lengths from about three to six metres
- Intermediate rafters carry the larger glass
Delivery and fitting in Windsor
We confirm the delivery cost and date for SL4 on your quote. Lanterns arrive palletised, with the glass packed separately.
If you would like us to fit it, we will check fitting cover for SL4 and quote a fixed price after seeing photos or surveying.
Delivery to SL4 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Windsor
Typical guide prices for large roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1500 × 3000 mm | 4.50 m² | £2,595–£2,995£2,162 ex VAT from | Configure |
| 2000 × 3000 mm | 6.00 m² | £3,195–£3,695£2,662 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 Windsor
In England, building regulations energy guidance sets a limiting U-value of 2.2 W/m²K for new and replacement rooflights in existing homes, measured horizontally.
Lanterns on permitted development extensions are part of the extension's height limits. Adding one to an existing roof is different: over 150 mm of projection can mean a planning application.
Building regulations in Windsor 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 Windsor
How is a large lantern delivered?
On pallets, usually with the frame and glass packed separately. The heaviest single item is normally a glass unit, which needs two or more people to lift safely.
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.
How quickly can I get a roof lantern in Windsor?
Stock sizes are typically ready in 5–10 working days, made-to-measure in 3–4 weeks, plus delivery. Your quote gives the date for SL4.
Do you deliver roof lanterns to Windsor?
Yes. Delivery to Windsor (SL4) is quoted for your exact postcode and confirmed in writing on your quote, together with the lead time.