How we approach rooflight upstands & kerbs in Sherborne
Our rooflight upstands & kerbs service in Sherborne covers insulated kerbs built and waterproofed to suit your rooflight. Every job starts with a survey of the opening, the roof covering and the room below, and a fixed written price.
Many South West towns mix Georgian and Victorian terraces with modern estates, so the right product differs street by street. Think of rooflight upstands & kerbs for roofs where the old kerb is low, cold or leaking.
We work across Dorset, including Sherborne, and in neighbouring towns such as Yeovil and Dorchester. Access, parking and how the glass reaches the roof are all checked at the survey.
Choices for your Sherborne project
- Raised upstands for deep green or ballasted roofs
- Proprietary insulated kerbs
- Timber upstands with insulation
- Upstand repairs and rebuilds
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Correct height above the finished roof
- Insulated to avoid a cold bridge
What to check first
- Upstand size must match the unit within a tight tolerance
- Insulation continuity around the upstand affects condensation
Do you need permission in Sherborne?
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. 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.
Under Approved Document L, a rooflight added to an English home must achieve at least 2.2 W/m²K (horizontal plane), and a roof window 1.4 W/m²K or Window Energy Rating Band B. 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.
Our planning guide covers each nation in more detail.
What do rooflight upstands & kerbs cost in Sherborne?
These are typical supply-and-fit ranges. For an address in Sherborne, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| 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 DT9 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits Sherborne, 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.
Neighbouring towns
Other services in Sherborne
Rooflight upstands & kerbs in Sherborne: 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.
Can an old upstand be reused?
If it is sound, square, insulated and the right size. Often it is cheaper to rebuild than adapt.
Does every rooflight need an upstand?
Flat and dome rooflights do. Pitched roof windows use flashing kits instead.
How do I book a survey in Sherborne?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Is the survey in Sherborne free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
