Large roof lanterns in Crowthorne
Buy large roof lanterns for homes in Crowthorne 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 RG45 address.
Price a large roof lantern for Crowthorne
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Crowthorne homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
In midsummer the noon sun stands about 62.1° high over Crowthorne, 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
- Fitting can be quoted on request
- Lengths from about three to six metres
Delivery and fitting in Crowthorne
We confirm the delivery cost and date for RG45 on your quote. Lanterns arrive palletised, with the glass packed separately.
Need it fitted? Send your postcode and we will confirm whether we have fitting cover in Crowthorne before quoting.
Delivery to RG45 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Crowthorne
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 × 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 Crowthorne
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 Crowthorne 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 Crowthorne
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.
What is the biggest roof lantern you can supply?
It depends on the range. Some go to about 6 m by 4 m with intermediate rafters. Send us your kerb size and we will confirm what can be made.
Can you fit a roof lantern in Crowthorne?
We can quote for fitting where we have cover. Send your postcode and photos of the roof and kerb, and we will confirm before quoting.
Is it worth having solar-control glass in Crowthorne?
With the midsummer sun about 62.1° high at noon, roof glass in Crowthorne gets strong summer sun. Solar control is recommended for large or south-facing lanterns.