Triple glazed roof lanterns in Dorchester
Planning an extension in Dorchester? A triple glazed 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 triple glazed roof lantern for Dorchester
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Triple glazed roof lanterns for Dorchester homes
Three panes for lower heat loss, a warmer inner surface and less noise.
In midsummer the noon sun stands about 62.7° high over Dorchester, so roof glazing gets the full strength of it. That is why solar-control glass is worth considering on larger lanterns here.
- Quieter in heavy rain
- Three panes for lower heat loss
- Combines with solar-control coatings
Delivery and fitting in Dorchester
We confirm the delivery cost and date for DT1 on your quote. Lanterns arrive palletised, with the glass packed separately.
Fitting in Dorchester can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to DT1 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Triple glazed roof lantern prices for Dorchester
Typical guide prices for triple glazed roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | 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 |
| 2000 × 3000 mm | 6.00 m² | £4,395–£5,095£3,662 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 Dorchester
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.
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 Dorchester 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 Dorchester
Can I have triple glazing with solar control?
Yes. Triple units usually include a solar-control or neutral coating.
Will triple glazing stop rain noise?
It reduces it noticeably. Laminated glass reduces it further.
Do you deliver roof lanterns to Dorchester?
Yes. Delivery to Dorchester (DT1) is quoted for your exact postcode and confirmed in writing on your quote, together with the lead time.
How quickly can I get a roof lantern in Dorchester?
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 DT1.