Replacement roof lanterns in Isleworth
Looking for a replacement roof lantern in Isleworth? We price it to your kerb size, confirm the fixed price in writing and deliver to TW7 and the surrounding postcodes, ready for your builder to fit or for us to quote fitting.
Price a replacement roof lantern for Isleworth
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Replacement roof lanterns for Isleworth homes
Swap a tired, leaking or polycarbonate lantern for modern double glazing.
Winter daylight in Isleworth lasts about 7h 50m, against 16h 38m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Replace old polycarbonate with glass
- Often a one-day swap on a sound kerb
- Warmer, quieter, brighter
Delivery and fitting in Isleworth
Your quote includes delivery to Isleworth 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 Isleworth before quoting.
Delivery to TW7 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Replacement roof lantern prices for Isleworth
What replacement roof lanterns cost in common sizes (guide, inc VAT, supply only):
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1500 mm | 1.50 m² | £1,295–£1,495£1,079 ex VAT from | Configure |
| 1000 × 2000 mm | 2.00 m² | £1,495–£1,795£1,246 ex VAT from | Configure |
| 2000 × 3000 mm | 6.00 m² | £3,195–£3,695£2,662 ex VAT from | Configure |
| 2000 × 4000 mm | 8.00 m² | £4,095–£4,795£3,412 ex VAT from | Configure |
Guide prices include VAT at 20%, supply only, aluminium with self-cleaning double glazing in a stock colour. Your fixed price is confirmed in writing on your quote before you order.
Planning and building regulations for Isleworth
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 Isleworth 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 Isleworth
How long does replacement take on site?
For a like-for-like swap on a sound kerb, often a day. Kerb or roof repairs add time.
Can I replace polycarbonate panels with glass?
Usually not in the old frame: glass is much heavier than polycarbonate and the frame was not designed for it. Replacing the whole lantern is the safer route.
Can you fit a roof lantern in Isleworth?
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 Isleworth?
With the midsummer sun about 62.0° high at noon, roof glass in Isleworth gets strong summer sun. Solar control is recommended for large or south-facing lanterns.