Trade roof lanterns
Aluminium roof lanterns for flat-roof extensions, made to the external size of your upstand (kerb) and supplied ready to assemble with glazing, ridge, hips and capping. Double or triple glazed, in the RAL colour of your choice.
- Product code
- TG-R01
- Guide trade price
- £650 to £1,950 per lantern, ex VAT, supply only
- Lead time
- The manufacturing time for roof lanterns depends on the specification, and the date is confirmed on your order acknowledgement.
- Delivery
- UK-wide to site, yard or unit, priced on your quote
- Category
- Roof glazing
Typical layout. W and H are the frame or glass sizes you give us.
What is in the specification?
- Thermally broken aluminium ridge, hips and rafters
- Made to your upstand size
- Double or triple glazed sealed units
- Solar-control and self-cleaning glass options
- Powder coated inside and out, single or dual colour
- Supplied with assembly instructions and fixings
- Rectangular and square sizes
Options you can add
- Solar-control glass
- Self-cleaning outer pane
- Triple glazing
- Dual colour
- Opening vent (system dependent)
- Upstand kits
Who orders trade roof lanterns?
Mostly builders and main contractors, conservatory and extension specialists and window and door installers. Typical uses include flat-roof kitchen extensions; orangeries and garden rooms; landings and stairwells under flat roofs.
Roof lanterns are made to the external size of the upstand they sit on, so the upstand needs to be built and measured before you order.
South-facing lanterns can let in a lot of solar heat. Solar-control glass reduces it, and we can quote both options so you can compare.
Lanterns arrive as a kit with glazing. Check site access and lifting for the larger sizes before delivery is booked.
Replacement rooflights and lanterns in England should meet the limiting U-value for rooflights in Approved Document L. Tell us where the job is; the glazing can be specified to suit, and the U-value is stated on your quote.
How should you measure?
Order roof lanterns by the external size of the finished upstand, measured at the top of the kerb once the roof covering is turned up it.
Which building regulations apply?
Replacement rooflights and roof lanterns in England should meet a U-value of 2.2 W/m²K under Approved Document L. A lantern in a new extension is covered by the extension's own building regulations approval. Replacing a glazed or polycarbonate conservatory roof with a solid roof usually takes the conservatory out of the exemption, so building control approval is normally needed.
Wales
In Wales, rooflights and lanterns must meet the thermal requirements in Approved Document L (Wales). Changing a conservatory's glazed roof to a solid roof will normally need building control approval. Check the detail with the local authority building control team.
Scotland
In Scotland, new rooflights and lanterns in an extension are covered by the extension's building warrant. For changes to a conservatory roof, check with the local authority verifier whether a warrant is needed.
Northern Ireland
In Northern Ireland, rooflights and lanterns should meet the energy guidance in the Technical Booklets. Check with your council's building control service before changing a conservatory roof.
More detail: Approved Document L guide safety glazing guide. Your installer or designer remains responsible for compliance and any notification.
How ordering works
Send your schedule
Sizes, quantities and options for each item, by form, email or photo.
Get an itemised quote
Every line priced separately, with delivery shown.
Approve the acknowledgement
Sizes, finishes and handing confirmed in writing.
Take delivery
To your site, yard or unit, booked for the date confirmed with you.
Questions trade customers ask
How do I measure for a roof lantern?
Give us the external size of the finished upstand. The lantern is made to sit on that kerb.
Do roof lanterns need building regulations approval?
A lantern in a new extension is part of the extension's building regulations approval. A replacement should meet the thermal requirements for rooflights.
Can a roof lantern open?
Some systems offer opening vents. Ask when you send the size.
Do you supply the upstand?
We can quote an upstand kit, or your builder can construct a timber upstand to the size you order.
Trade roof lanterns by area
Area pages cover delivery and the regulations that apply where the job is.