Dome rooflights in Cardiff: what is involved?
We handle dome rooflights across South Glamorgan, including Cardiff. In short: polycarbonate and acrylic domes for flat roofs, new or replacement. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Chapels, barns and farm buildings converted across Wales often need bespoke or conservation-style glass. Typical uses for dome rooflights include older flat roofs with yellowed or leaking domes.
We cover all of Cardiff and the CF10 district, and nearby Penarth and Dinas Powys.
Specification options
- Polycarbonate or acrylic
- Fall-through protection mesh
- Fixed or hinged with vent
- Insulated PVC or GRP upstands
- Twin, triple or quad skin
- Suits schools, flats and commercial roofs
- Quick replacement on existing upstands
Things we check at survey
- Plastic domes have a lower acoustic and thermal performance than glass
- Old domes may be fragile — treat as fragile until checked
Rules and responsibilities in Cardiff
On commercial roofs the main questions are usually building control, fire classification of rooflight materials and safe access rather than householder permitted development. We confirm the route for your building before ordering.
For non-domestic buildings in Wales, Approved Document L sets limiting U-values for rooflights and roof ventilators; we supply the manufacturer's data for the building control submission. Fire classification of rooflight materials near boundaries is checked at specification.
Read the planning permission guide before you commit to a design.
Dome rooflights prices in Cardiff
These are typical supply-and-fit ranges. For an address in Cardiff, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Dome and new insulated upstand | £955 – £1,675 | £795 – £1,395 |
| Hinged or vented dome Typical | £715 – £1,195 | £595 – £995 |
| Replacement fixed dome | £475 – £835 | £395 – £695 |
What happens next
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Cardiff address.
- 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.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
Related work in Cardiff
Dome rooflights in Cardiff: questions
Why has my dome gone yellow?
UV breaks down older plastics over time. Modern domes have UV-protective layers, but all plastics age.
Should I replace a dome or switch to glass?
A dome is cheaper and quick; glass gives a clear view and better performance. On a tight budget, or a commercial roof with many units, domes remain sensible.
Do domes leak?
Leaks are usually at the upstand seal or the membrane. Replacing the dome and resealing often fixes it.
Do you fit dome rooflights in Cardiff?
Yes. We survey and fit dome rooflights in Cardiff and across South Glamorgan. Send your postcode and we will offer a survey date when we reply.
How do I book a survey in Cardiff?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
