Triple glazed roof lanterns in Harpenden
Buy triple glazed roof lanterns for homes in Harpenden and across Hertfordshire. Choose a standard size or have one made to your kerb, see a guide price straight away, then get a fixed written quote with delivery to your AL5 address.
Price a triple glazed roof lantern for Harpenden
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Triple glazed roof lanterns for Harpenden homes
Three panes for lower heat loss, a warmer inner surface and less noise.
In midsummer the noon sun stands about 61.6° high over Harpenden, so roof glazing gets the full strength of it. That is why solar-control glass is worth considering on larger lanterns here.
- Warmer inner pane, less condensation risk
- Combines with solar-control coatings
- Three panes for lower heat loss
Delivery and fitting in Harpenden
Your quote includes delivery to Harpenden at a confirmed price, usually to the kerbside or driveway on pallets.
Need it fitted? Send your postcode and we will confirm whether we have fitting cover in Harpenden before quoting.
Delivery to AL5 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Triple glazed roof lantern prices for Harpenden
What triple glazed roof lanterns cost in common sizes (guide, inc VAT, supply only):
| Kerb size | Roof area | Guide price | 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 |
| 2000 × 4000 mm | 8.00 m² | £5,595–£6,495£4,662 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 Harpenden
In England, building regulations energy guidance sets a limiting U-value of 2.2 W/m²K for new and replacement rooflights in existing homes, measured horizontally.
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 in Harpenden 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 Harpenden
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.
Who checks building regulations for a lantern in Harpenden?
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 Harpenden?
With the midsummer sun about 61.6° high at noon, roof glass in Harpenden gets strong summer sun. Solar control is recommended for large or south-facing lanterns.