What do rooflight upstands & kerbs in Monmouth involve?
Rooflight upstands & kerbs in Monmouth means insulated kerbs built and waterproofed to suit your rooflight. We cover the NP25 district and the rest of Gwent, with a survey before any price is fixed.
Slate roofs, stone cottages and terraced valleys are typical across Wales, and slim rooflights that sit low in the slates suit them best. Think of rooflight upstands & kerbs for new flat-roof openings and rooflight replacements.
From Monmouth to Abergavenny, Pontypool and Cwmbran, the same survey-first process applies: measure, specify, fix the price, then fit.
What you can choose
- Timber upstands with insulation
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Internal plaster-box linings
- Upstand repairs and rebuilds
- Proprietary insulated kerbs
- Membrane dressed up and sealed
- Insulated to avoid a cold bridge
Things we check at survey
- Insulation continuity around the upstand affects condensation
- Upstand size must match the unit within a tight tolerance
Do you need permission in Monmouth?
Welsh householder permitted development (Class C) allows rooflights that project no more than 15 cm and sit no higher than the existing roof — but not in conservation areas, National Parks, AONBs or World Heritage Sites. 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. A revised Welsh Approved Document L takes effect on 4 March 2027; rooflights in new dwellings stay at 2.2 W/m²K.
Our planning guide covers each nation in more detail.
Guide prices for Monmouth
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 |
From enquiry to finished job
- Tell us what you have. Send the NP25 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits Monmouth, measures and checks structure and access.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Rooflight upstands & kerbs near Monmouth
Related work in Monmouth
Rooflight upstands & kerbs in Monmouth: questions
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.
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 you work alongside my builder in Monmouth?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Do I need to be at home for the survey in Monmouth?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
