Triple glazed roof lanterns in St Helens
Whether your St Helens extension is still on paper or the roof is already on, we can price a triple glazed roof lantern to suit it. Standard sizes cost less and arrive sooner; made-to-measure fits a kerb that is already built.
Price a triple glazed roof lantern for St Helens
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Triple glazed roof lanterns for St Helens homes
Three panes for lower heat loss, a warmer inner surface and less noise.
In midsummer the noon sun stands about 60.0° high over St Helens, 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 St Helens
We confirm the delivery cost and date for WA10 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 WA10 and quote a fixed price after seeing photos or surveying.
Delivery to WA10 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Triple glazed roof lantern prices for St Helens
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 St Helens
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.
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 St Helens 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 St Helens
Will triple glazing stop rain noise?
It reduces it noticeably. Laminated glass reduces it further.
Do I need triple glazing to meet building regulations?
Not usually. Well-specified double glazed lanterns generally meet the limiting values for rooflights. Triple glazing is an upgrade, not normally a requirement. Your building control body can confirm for your project.
Can you fit a roof lantern in St Helens?
We can quote for fitting where we have cover. Send your postcode and photos of the roof and kerb, and we will confirm before quoting.
Is it worth having solar-control glass in St Helens?
With the midsummer sun about 60.0° high at noon, roof glass in St Helens gets strong summer sun. Solar control is recommended for large or south-facing lanterns.