Roof lantern upstands in Portishead
For roof lantern upstands in Portishead, start with the guide prices on this page, then send photos and measurements for a fixed written quote covering BS20.
Price a roof lantern upstand for Portishead
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Lantern upstands for Portishead projects
Insulated upstands and kerbs that raise the lantern above the roof finish.
In midsummer the noon sun stands about 62.0° high over Portishead, so roof glazing gets the full strength of it. That is why solar-control glass is worth considering on larger lanterns here.
- Level and square for a correct fit
- Lifts the lantern clear of the roof finish
- Prefabricated insulated or site-built timber
Delivery and fitting in Portishead
We confirm the delivery cost and date for BS20 on your quote. Lanterns arrive palletised, with the glass packed separately.
Fitting in Portishead can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to BS20 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Roof lantern upstands guide prices for Portishead
Guide prices for an insulated upstand on its own, by lantern size, including VAT:
| Lantern kerb size | Perimeter | Insulated upstand, guide |
|---|---|---|
| 1500 × 1500 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 |
| 1500 × 2000 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 Portishead
England's Approved Document L caps the U-value of new or replacement rooflights in existing homes at 2.2 W/m²K, calculated with the glass horizontal.
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 Portishead 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 Portishead
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 makes the upstand weatherproof?
Your roofer, by dressing the roof membrane up the outside of the upstand. The lantern then sits over it.
Who checks building regulations for a lantern in Portishead?
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 Portishead?
With the midsummer sun about 62.0° high at noon, roof glass in Portishead gets strong summer sun. Solar control is recommended for large or south-facing lanterns.