Roof lantern upstands in Chalfont St Peter
We quote roof lantern upstands for Chalfont St Peter and the rest of Buckinghamshire, matched to the exact size of your lantern, with the price confirmed in writing before you order.
Price a roof lantern upstand for Chalfont St Peter
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Lantern upstands for Chalfont St Peter projects
Insulated upstands and kerbs that raise the lantern above the roof finish.
At 51.61°N, Chalfont St Peter sees roughly 7h 48m of daylight in late December and 16h 40m in late June. A lantern faces the bright overhead sky all year, so it brings in useful light even on the short, grey days.
- Roof membrane dressed up the outside
- Ordered with your lantern if you wish
- Prefabricated insulated or site-built timber
Delivery and fitting in Chalfont St Peter
We confirm the delivery cost and date for SL9 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 SL9 and quote a fixed price after seeing photos or surveying.
Delivery to SL9 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Roof lantern upstands guide prices for Chalfont St Peter
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 |
| 1000 × 2000 mm | 6.0 m | £295£246 ex VAT |
| 1000 × 2500 mm | 7.0 m | £295£246 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 Chalfont St Peter
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.
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 Chalfont St Peter 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 Chalfont St Peter
Who makes the upstand weatherproof?
Your roofer, by dressing the roof membrane up the outside of the upstand. The lantern then sits over it.
Can I order a lantern before the upstand is built?
Yes, if you build the upstand to the lantern's stated external size. Many people order the lantern and upstand together so they match.
Who checks building regulations for a lantern in Chalfont St Peter?
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 Chalfont St Peter?
With the midsummer sun about 61.8° high at noon, roof glass in Chalfont St Peter gets strong summer sun. Solar control is recommended for large or south-facing lanterns.