Rooflight upstands & kerbs in West Glamorgan: the essentials
Across West Glamorgan, our rooflight upstands & kerbs work covers insulated kerbs built and waterproofed to suit your rooflight. Survey first, fixed price second, fitting third.
Welsh planning rules exclude rooflights from permitted development in conservation areas and National Parks, so we check the designation before quoting. Chapels, barns and farm buildings converted across Wales often need bespoke or conservation-style glass.
Towns in West Glamorgan
What you can choose
- Proprietary insulated kerbs
- Raised upstands for deep green or ballasted roofs
- Upstand repairs and rebuilds
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Internal plaster-box linings
- Built square to the rooflight size
- Insulated to avoid a cold bridge
Planning and building rules in Wales
In Wales a rooflight on a house is usually permitted development if it stands no more than 15 cm proud of the roof, except on protected land such as conservation areas and National Parks, where permission is needed. 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.
What do rooflight upstands & kerbs cost in West Glamorgan?
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| 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 |
How the job runs
- Tell us about the roof. Send the postcode, rough sizes and a photo or two through the form, WhatsApp or the guide-price tool.
- Free survey. For new installations a surveyor measures the opening, checks the roof build-up and talks through glass and options.
- Fixed written quote. You get the product, the work and the price in writing. Nothing is ordered or paid for until you agree.
- Fitting and handover. We fit, seal and make good, then hand over product data, warranties and any certificate paperwork.
Upstands & kerbs in nearby areas
Common questions
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.
What roof coverings do you work with?
Single-ply, EPDM, felt, GRP and liquid-applied systems — or we coordinate with your roofer.
Does every rooflight need an upstand?
Flat and dome rooflights do. Pitched roof windows use flashing kits instead.
Can I build the upstand myself?
Your builder can, to our drawing. We check it before the rooflight is fitted, because the unit must sit square and level.
Do I need to be at home for the survey in West Glamorgan?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
