Rooflight upstands & kerbs for Carmarthen: the essentials
For Carmarthen homes and buildings we offer rooflight upstands & kerbs: insulated kerbs built and waterproofed to suit your rooflight. We measure first, specify to the opening and confirm any planning or building-control points before quoting.
Many Welsh homes have older single-storey rear extensions where a glass rooflight brightens a dark kitchen. In Carmarthen, as anywhere, rooflight upstands & kerbs are the usual choice for roofs where the old kerb is low, cold or leaking.
From Carmarthen to Llanelli, Ammanford and Gorseinon, the same survey-first process applies: measure, specify, fix the price, then fit.
Specification options
- Proprietary insulated kerbs
- Raised upstands for deep green or ballasted roofs
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Internal plaster-box linings
- Timber upstands with insulation
- Fixings and falls agreed with the rooflight maker
- Correct height above the finished roof
Things we check at survey
- Minimum upstand height is set by the rooflight manufacturer — commonly 150 mm above the finished roof
- Membrane compatibility with the rooflight's sealants
Planning, building control and Carmarthen
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.
Read the planning permission guide before you commit to a design.
Rooflight upstands & kerbs prices in Carmarthen
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 |
The process, step by step
- Send the details. Postcode, rough size and a photo of the roof and room.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Rooflight upstands & kerbs near Carmarthen
Related work in Carmarthen
Questions about rooflight upstands & kerbs in Carmarthen
Does every rooflight need an upstand?
Flat and dome rooflights do. Pitched roof windows use flashing kits instead.
Why is my rooflight cold around the edge?
Usually an uninsulated upstand. Insulating the kerb and lining the reveal fixes most cold spots.
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.
Can you work alongside my builder in Carmarthen?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Do you offer rooflight upstands & kerbs in Carmarthen?
Yes. We carry out rooflight upstands & kerbs in Carmarthen and across Dyfed. Send your postcode and we will offer a survey date when we reply.
