What do rooflight upstands & kerbs in Cardiff involve?
Our rooflight upstands & kerbs service in Cardiff covers insulated kerbs built and waterproofed to suit your rooflight. Every job starts with a survey of the opening, the roof covering and the room below, and a fixed written price.
Chapels, barns and farm buildings converted across Wales often need bespoke or conservation-style glass. Think of rooflight upstands & kerbs for roofs where the old kerb is low, cold or leaking.
We cover all of Cardiff and the CF10 district, and nearby Penarth and Dinas Powys.
Specification options
- Raised upstands for deep green or ballasted roofs
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Proprietary insulated kerbs
- Timber upstands with insulation
- Upstand repairs and rebuilds
- Built square to the rooflight size
- Fixings and falls agreed with the rooflight maker
Before you order: points to check
- Minimum upstand height is set by the rooflight manufacturer — commonly 150 mm above the finished roof
- Upstand size must match the unit within a tight tolerance
Planning, building control and 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. A side-facing rooflight within 10.5 m of the boundary must be obscure-glazed, and non-opening unless the opening part is more than 1.7 m above the floor.
Welsh Building Regulations expect new or replacement rooflights to reach 2.2 W/m²K and roof windows 1.4 W/m²K or a Band B rating. Wales also has its own overheating rules (Part O) for new homes, in force since November 2022.
Our planning guide covers each nation in more detail.
Rooflight upstands & kerbs prices in Cardiff
Prices below are shown including and excluding VAT. In Cardiff, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or raised upstand | £715 – £1,195 | £595 – £995 |
| Standard insulated upstand Typical | £475 – £715 | £395 – £595 |
| Small upstand on new roof | £355 – £475 | £295 – £395 |
From enquiry to finished job
- 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.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Rooflight upstands & kerbs near Cardiff
Related work in Cardiff
Rooflight upstands & kerbs in Cardiff: questions
Why is my rooflight cold around the edge?
Usually an uninsulated upstand. Insulating the kerb and lining the reveal fixes most cold spots.
How high should a rooflight upstand be?
High enough to meet the rooflight manufacturer's minimum above the finished roof surface — commonly 150 mm. On roofs with deep finishes, such as green roofs, it needs to be taller.
Does every rooflight need an upstand?
Flat and dome rooflights do. Pitched roof windows use flashing kits instead.
Do I need to be at home for the survey in Cardiff?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
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.
