Trade flat rooflights
Flat glass rooflights for flat roofs, with a minimal frame that is hidden from inside so only glass is seen. Made to the size of your upstand, double or triple glazed, with a laminated inner pane.
- Product code
- TG-R02
- Guide trade price
- £380 to £1,250 per rooflight, ex VAT, supply only
- Lead time
- Lead times for flat rooflights vary with size and spec. We give you the date when we acknowledge your order.
- 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?
- Minimal or hidden aluminium frame
- Made to your upstand size
- Double or triple glazed
- Toughened outer pane and laminated inner pane
- Built-in fall or set on a sloped kerb for drainage
- Solar-control glass options
- Square and rectangular sizes
Options you can add
- Triple glazing
- Solar-control glass
- Walk-on glass (system dependent)
- Electric opening (system dependent)
- Obscure inner pane
Who orders trade flat rooflights?
Mostly builders and main contractors, conservatory and extension specialists and architects and specifiers. Typical uses include flat-roof extensions; bathrooms and hallways under flat roofs; kitchens wanting a clean ceiling line.
A flat rooflight should not be laid dead flat. Water needs to run off, so the upstand is built to a slight fall or the unit has one built in.
The inner pane is laminated so that if the glass breaks it stays in place rather than falling into the room below.
Walk-on and opening rooflights are different systems. If you need either, say so when you request a quote.
Rooflights in England should meet the limiting U-value for rooflights in Approved Document L. The glazing can be specified to suit where the job is, and the U-value is stated on your quote.
How should you measure?
Flat rooflights need a fall so water runs off. Build the upstand to a slight slope or use a unit with a built-in fall, and give us the upstand size.
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
List what you need
One line per window, door or unit, with width, height and finish.
Check your quote
We price each item and flag anything that needs clarifying.
Confirm the order
Production starts only after you approve the written order.
Receive your goods
We aim to deliver on the confirmed date; check the goods against the delivery note.
Questions trade customers ask
Why does a flat rooflight need a fall?
So rainwater runs off instead of sitting on the glass. The upstand or the unit provides the slope.
Is the glass safe overhead?
The inner pane is laminated so broken glass stays held together.
Can I walk on a flat rooflight?
Only if it is a walk-on unit designed for it. Tell us if you need one.
How do I measure?
Give us the external size of the finished upstand.
Trade flat rooflights by area
Area pages cover delivery and the regulations that apply where the job is.