Triple glazed roof lanterns in Cornwall

Choosing triple glazed roof lanterns in Cornwall

Three panes for lower heat loss, a warmer inner surface and less noise.

Across Cornwall, the shortest day brings around 8h 01m of daylight and the midsummer sun reaches about 63.1° at noon. A lantern collects light from the bright overhead sky all year, and the right glass keeps the long summer days comfortable.

• Quieter in heavy rain
• Three panes for lower heat loss
• Approximate weight shown before you order
• Combines with solar-control coatings

Delivery and fitting in Cornwall

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.

Triple glazed roof lantern prices

What triple glazed roof lanterns cost in common sizes (guide, inc VAT, supply only):

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 in Cornwall

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.

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

Triple glazed roof lanterns in Cornwall: questions