Opening roof lanterns in Dorset

Choosing opening roof lanterns in Dorset

Electric opening vents to let warm air out at the highest point of the room.

Across Dorset, the shortest day brings around 7h 57m of daylight and the midsummer sun reaches about 62.7° at noon. A lantern collects light from the bright overhead sky all year, and the right glass keeps the long summer days comfortable.

• Electric vents at the room's highest point
• Plan the power supply early
• Rain sensor closes it automatically
• One or two vents depending on size

Delivery and fitting in Dorset

Delivery to mainland addresses here is quoted for your postcode and confirmed in writing before you order.

Fitting can be quoted where we have cover; send your postcode and photos of the roof and kerb and we will confirm before quoting.

Opening roof lantern prices

Guide prices for common opening roof lantern sizes, including VAT, supply only:

Guide prices include VAT at 20%, supply only, aluminium with self-cleaning double glazing in a stock colour, including one electric vent. Your fixed price is confirmed in writing on your quote before you order.

Planning and building regulations in Dorset

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.

Lanterns on permitted development extensions are part of the extension's height limits. Adding one to an existing roof is different: over 150 mm of projection can mean a planning application.

Building regulations 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

Opening roof lanterns in Dorset: questions