Roof lantern upstands in Dartford
We quote roof lantern upstands for Dartford and the rest of Kent, matched to the exact size of your lantern, with the price confirmed in writing before you order.
Price a roof lantern upstand for Dartford
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Lantern upstands for Dartford projects
Insulated upstands and kerbs that raise the lantern above the roof finish.
Winter daylight in Dartford 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.
- Level and square for a correct fit
- Lifts the lantern clear of the roof finish
- Roof membrane dressed up the outside
Delivery and fitting in Dartford
Delivery to DA1 is quoted for your postcode and arrives on pallets at the kerbside, so plan enough people to unload.
Fitting in Dartford can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to DA1 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Roof lantern upstands guide prices for Dartford
Guide prices for an insulated upstand on its own, by lantern size, including VAT:
| Lantern kerb size | Perimeter | Insulated upstand, guide |
|---|---|---|
| 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 |
| 1000 × 3000 mm | 8.0 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 Dartford
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 Dartford 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 Dartford
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 makes the upstand weatherproof?
Your roofer, by dressing the roof membrane up the outside of the upstand. The lantern then sits over it.
Is it worth having solar-control glass in Dartford?
With the midsummer sun about 62.0° high at noon, roof glass in Dartford gets strong summer sun. Solar control is recommended for large or south-facing lanterns.
Who checks building regulations for a lantern in Dartford?
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.