Triple glazed roof lanterns in Weymouth
We supply triple glazed roof lanterns to Weymouth (DT4) and the rest of Dorset: sized in millimetres to your upstand, priced up front and delivered on pallets. Fitting can be quoted separately if you need it.
Price a triple glazed roof lantern for Weymouth
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Triple glazed roof lanterns for Weymouth homes
Three panes for lower heat loss, a warmer inner surface and less noise.
At 50.61°N, Weymouth sees roughly 7h 58m of daylight in late December and 16h 29m in late June. A lantern faces the bright overhead sky all year, so it brings in useful light even on the short, grey days.
- Approximate weight shown before you order
- Ideal for colder, exposed locations
- Quieter in heavy rain
Delivery and fitting in Weymouth
We confirm the delivery cost and date for DT4 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 DT4 and quote a fixed price after seeing photos or surveying.
Delivery to DT4 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Triple glazed roof lantern prices for Weymouth
Guide prices for common triple glazed roof lantern sizes, including VAT, supply only:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1500 mm | 1.50 m² | £1,795–£2,095£1,496 ex VAT from | Configure |
| 1000 × 2000 mm | 2.00 m² | £2,095–£2,495£1,746 ex VAT from | Configure |
| 1500 × 2000 mm | 3.00 m² | £2,695–£3,195£2,246 ex VAT from | Configure |
| 1500 × 2500 mm | 3.75 m² | £3,095–£3,595£2,579 ex VAT from | Configure |
Guide prices include VAT at 20%, supply only, aluminium with triple glazing in a stock colour. Your fixed price is confirmed in writing on your quote before you order.
Planning and building regulations for Weymouth
England's Approved Document L caps the U-value of new or replacement rooflights in existing homes at 2.2 W/m²K, calculated with the glass horizontal.
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 Weymouth 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 Weymouth
Is triple glazing heavier to lift?
Yes, the glass is roughly 45% heavier. Plan for extra hands or lifting equipment on larger lanterns.
Will triple glazing stop rain noise?
It reduces it noticeably. Laminated glass reduces it further.
Is it worth having solar-control glass in Weymouth?
With the midsummer sun about 62.8° high at noon, roof glass in Weymouth gets strong summer sun. Solar control is recommended for large or south-facing lanterns.
Do I need planning permission for a roof lantern in Weymouth?
Often not, but it depends on the roof, the property and whether it is listed or in a conservation area. Check with your district, borough or unitary council before ordering.