Square roof lanterns in Thamesmead
Whether your Thamesmead extension is still on paper or the roof is already on, we can price a square roof lantern to suit it. Standard sizes cost less and arrive sooner; made-to-measure fits a kerb that is already built.
Price a square roof lantern for Thamesmead
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Square roof lanterns for Thamesmead homes
Four triangular panes meeting at a point: a pyramid lantern for square openings.
In midsummer the noon sun stands about 61.9° high over Thamesmead, so roof glazing gets the full strength of it. That is why solar-control glass is worth considering on larger lanterns here.
- No ridge, a neat apex cap instead
- Strong central focal point from below
- Stock colours or any RAL on request
Delivery and fitting in Thamesmead
We confirm the delivery cost and date for SE28 on your quote. Lanterns arrive palletised, with the glass packed separately.
Fitting in Thamesmead can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to SE28 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Square roof lantern prices for Thamesmead
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 Thamesmead
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 Thamesmead 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 Thamesmead
Is a pyramid lantern more expensive than a rectangular one?
Per square metre it can cost slightly more, because every pane is a triangle and the apex needs a special joint. The difference is usually small next to the effect of size and glass choice.
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.
Who checks building regulations for a lantern in Thamesmead?
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 Thamesmead?
With the midsummer sun about 61.9° high at noon, roof glass in Thamesmead gets strong summer sun. Solar control is recommended for large or south-facing lanterns.