Frameless structural rooflights for Cardiff: the essentials
Thinking about frameless structural rooflights in Cardiff? The short answer: minimal glass rooflights with no visible frame from inside. The longer answer depends on your roof, which is why we survey before we price.
Slate roofs, stone cottages and terraced valleys are typical across Wales, and slim rooflights that sit low in the slates suit them best. Think of frameless structural rooflights for rooms where you want sky without a visible frame.
Cardiff is the main town we list in South Glamorgan; we also cover nearby Penarth and Dinas Powys.
What you can choose
- Low-iron extra-clear glass
- Shadow-gap or plastered reveal
- Solar-control coatings
- Triple glazing
- Butt-jointed runs for long openings
- Long, slim or very large formats
- Double or triple glazed structural units
What to check first
- The internal finish (plaster, shadow gap) is agreed before order
- Structural glass specification comes from the manufacturer
Planning and building rules for Cardiff
Planning rules in Wales are tighter than in England for rooflights: Class C rights do not apply in conservation areas, National Parks or AONBs, so a rooflight there needs planning permission. Listed buildings need listed building consent from the council, and flats have no householder permitted development rights.
Approved Document L in Wales (2022 edition) sets 2.2 W/m²K for rooflights, measured horizontally, and 1.4 W/m²K or Band B for roof windows in existing homes. Wales also has its own overheating rules (Part O) for new homes, in force since November 2022.
Read the planning permission guide before you commit to a design.
Frameless structural rooflights prices in Cardiff
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Long-format or jointed run | £6,595 – £11,995 | £5,495 – £9,995 |
| Large single pane Typical | £4,795 – £7,195 | £3,995 – £5,995 |
| Standard frameless unit | £3,595 – £4,795 | £2,995 – £3,995 |
The process, step by step
- Tell us what you have. Send the CF10 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits Cardiff, measures and checks structure and access.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
More we do in Cardiff
Questions about frameless structural rooflights in Cardiff
Is frameless glass as strong as a framed rooflight?
Yes — it is structural glass designed for the job. The support is hidden rather than missing.
How is it lifted onto the roof?
Larger panes go up with a vacuum lifter, a hoist or a crane. We plan access at survey.
Will I see the edge of the glass?
From inside, the reveal is finished up to the glass so the edge is hidden. From outside you will see the glass and its edge seal.
Can you work alongside my builder in Cardiff?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Do you fit frameless structural rooflights in Cardiff?
Yes. We survey and fit frameless structural rooflights in Cardiff and across South Glamorgan. Send your postcode and we will offer a survey date when we reply.
