How we approach rooflight upstands & kerbs in Dunstable
Thinking about rooflight upstands & kerbs in Dunstable? The short answer: insulated kerbs built and waterproofed to suit your rooflight. The longer answer depends on your roof, which is why we survey before we price.
Period cottages and conservation-area streets are common in the South East, so slim conservation rooflights are often the right choice. Typical uses for rooflight upstands & kerbs include roofs where the old kerb is low, cold or leaking.
From Dunstable to Luton, Leighton Buzzard and Flitwick, the same survey-first process applies: measure, specify, fix the price, then fit.
Options we can specify in Dunstable
- Internal plaster-box linings
- Timber upstands with insulation
- Raised upstands for deep green or ballasted roofs
- Proprietary insulated kerbs
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Matched to your roof covering
- Built square to the rooflight size
Before you order: points to check
- Insulation continuity around the upstand affects condensation
- Upstand size must match the unit within a tight tolerance
Consents for rooflight upstands & kerbs in Dunstable
In England a rooflight on a house is usually permitted development under Class C if it projects no more than 150 mm beyond the roof slope and sits no higher than the ridge. Listed buildings need listed building consent, flats have no householder permitted development rights, and an Article 4 direction can remove the rights in some conservation areas.
Building Regulations Approved Document L sets a limiting U-value of 2.2 W/m²K for new or replacement rooflights in existing homes, measured in the horizontal plane; roof windows need 1.4 W/m²K or a Band B energy rating. In an extension, glazing including rooflights is normally limited to 25% of the new floor area plus any windows or doors the extension covers, unless a whole-house calculation shows otherwise.
See our building regulations guide for U-values, glazing limits and self-certification.
What do rooflight upstands & kerbs cost in Dunstable?
Guide prices for rooflight upstands & kerbs in Dunstable 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 |
From enquiry to finished job
- Send the details. Postcode, rough size and a photo of the roof and room.
- Measure and check. A surveyor visits Dunstable, 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.
Nearby towns
Other services in Dunstable
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.
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 Dunstable?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Will I need planning permission in Dunstable?
English householder permitted development (Class C) normally covers rooflights that stand no more than 0.15 m proud of the roof plane and stay below the highest part of the roof.
