Square roof lanterns in Trowbridge
Planning an extension in Trowbridge? A square roof lantern is one of the quickest ways to bring daylight into the middle of the room. Use the configurator for a guide price, then send your kerb size for a fixed quote and delivery date.
Price a square roof lantern for Trowbridge
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Square roof lanterns for Trowbridge homes
Four triangular panes meeting at a point: a pyramid lantern for square openings.
Winter daylight in Trowbridge lasts about 7h 51m, against 16h 36m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Strong central focal point from below
- No ridge, a neat apex cap instead
- Square sizes from about one metre
Delivery and fitting in Trowbridge
We confirm the delivery cost and date for BA14 on your quote. Lanterns arrive palletised, with the glass packed separately.
Fitting in Trowbridge can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to BA14 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Square roof lantern prices for Trowbridge
Typical guide prices for square roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1000 mm | 1.00 m² | £1,095–£1,295£912 ex VAT from | Configure |
| 1200 × 1200 mm | 1.44 m² | £1,295–£1,495£1,079 ex VAT from | Configure |
| 1500 × 1500 mm | 2.25 m² | £1,595–£1,895£1,329 ex VAT from | Configure |
| 2000 × 2000 mm | 4.00 m² | £2,395–£2,795£1,996 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 Trowbridge
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.
On a permitted development extension the lantern counts towards the extension's height; on an existing roof, a rooflight projecting more than 150 mm may need planning permission.
Building regulations in Trowbridge 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 Trowbridge
Can I have an opening vent in a pyramid lantern?
Some ranges can fit a vent in one of the triangular panes, others cannot. We will tell you on the quote whether your chosen range allows it.
Will a square lantern leak at the top?
It should not when it is correctly installed and maintained. The apex is factory-designed to shed water; leaks usually come from the upstand or roof membrane rather than the lantern itself, which is why the upstand detail matters.
Can you fit a roof lantern in Trowbridge?
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.
Who checks building regulations for a lantern in Trowbridge?
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.