Roof lantern upstands in Isleworth
We quote roof lantern upstands for Isleworth and the rest of Greater London, matched to the exact size of your lantern, with the price confirmed in writing before you order.
Price a roof lantern upstand for Isleworth
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Lantern upstands for Isleworth projects
Insulated upstands and kerbs that raise the lantern above the roof finish.
In midsummer the noon sun stands about 62.0° high over Isleworth, so roof glazing gets the full strength of it. That is why solar-control glass is worth considering on larger lanterns here.
- Prefabricated insulated or site-built timber
- Level and square for a correct fit
- Ordered with your lantern if you wish
Delivery and fitting in Isleworth
We confirm the delivery cost and date for TW7 on your quote. Lanterns arrive palletised, with the glass packed separately.
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.
Roof lantern upstands guide prices for Isleworth
Guide prices for an insulated upstand on its own, by lantern size, including VAT:
| Lantern kerb size | Perimeter | Insulated upstand, guide |
|---|---|---|
| 1200 × 1200 mm | 4.8 m | £245£204 ex VAT |
| 1000 × 1500 mm | 5.0 m | £245£204 ex VAT |
| 1500 × 2500 mm | 8.0 m | £345£288 ex VAT |
| 1500 × 3000 mm | 9.0 m | £345£288 ex VAT |
Guide prices include VAT at 20%, upstand only, supply only. Upstands are made to match the lantern's external size; your fixed price is confirmed in writing before you order.
Planning and building regulations for Isleworth
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.
On a permitted development extension the lantern counts towards the extension's height; on an existing roof, a rooflight projecting more than 150 mm may need planning permission.
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
Do I need an upstand for a roof lantern?
Yes. Lanterns are designed to sit on an upstand, never directly on the roof deck.
What height should my upstand be?
High enough to keep water away from the lantern seal, commonly at least 150 mm above the finished roof surface. Follow the instructions for your chosen range.
Who checks building regulations for a lantern in Isleworth?
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 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.