Rooflight upstands & kerbs in Caerphilly: what is involved?
Rooflight upstands & kerbs in Caerphilly means insulated kerbs built and waterproofed to suit your rooflight. We cover the CF83 district and the rest of Gwent, with a survey before any price is fixed.
Welsh planning rules exclude rooflights from permitted development in conservation areas and National Parks, so we check the designation before quoting. Think of rooflight upstands & kerbs for new flat-roof openings and rooflight replacements.
From Caerphilly to Risca, Pontypridd and Cardiff, the same survey-first process applies: measure, specify, fix the price, then fit.
Options we can specify in Caerphilly
- Internal plaster-box linings
- Upstand repairs and rebuilds
- Timber upstands with insulation
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Proprietary insulated kerbs
- Insulated to avoid a cold bridge
- 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
- Insulation continuity around the upstand affects condensation
Planning, building control and Caerphilly
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.
In Wales the limiting values are 2.2 W/m²K for a rooflight and 1.4 W/m²K (or WER Band B) for a roof window in an existing house. Wales also has its own overheating rules (Part O) for new homes, in force since November 2022.
See our building regulations guide for U-values, glazing limits and self-certification.
Guide prices for Caerphilly
Guide prices for rooflight upstands & kerbs in Caerphilly are the same as anywhere we work — what changes the price is the job: access, structure, scaffold and finishing.
| 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
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Caerphilly address.
- Measure and check. A surveyor visits Caerphilly, measures and checks structure and access.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
Related work in Caerphilly
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.
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.
Does every rooflight need an upstand?
Flat and dome rooflights do. Pitched roof windows use flashing kits instead.
Do you offer rooflight upstands & kerbs in Caerphilly?
Yes. We carry out rooflight upstands & kerbs in Caerphilly and across Gwent. Send your postcode and we will offer a survey date when we reply.
How do I book a survey in Caerphilly?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
