What do rooflight upstands & kerbs in Corby involve?
Rooflight upstands & kerbs in Corby means insulated kerbs built and waterproofed to suit your rooflight. We cover the NN17 district and the rest of Northamptonshire, with a survey before any price is fixed.
Industrial and commercial units around Midlands towns often still have their original rooflight sheets, which are due for replacement. Rooflight upstands & kerbs suit roofs where the old kerb is low, cold or leaking.
We work across Northamptonshire, including Corby, and in neighbouring towns such as Uppingham and Kettering. Access, parking and how the glass reaches the roof are all checked at the survey.
Choices for your Corby project
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Internal plaster-box linings
- Raised upstands for deep green or ballasted roofs
- Proprietary insulated kerbs
- Timber upstands with insulation
- Fixings and falls agreed with the rooflight maker
- Built square to the rooflight size
Things we check at survey
- Upstand size must match the unit within a tight tolerance
- Minimum upstand height is set by the rooflight manufacturer — commonly 150 mm above the finished roof
Do you need permission in Corby?
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. A rooflight on a side-facing slope must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor.
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 Corby?
These are typical supply-and-fit ranges. For an address in Corby, 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
- 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.
- Agree the quote. You approve the specification and price before anything is ordered.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Rooflight upstands & kerbs near Corby
Other services in Corby
Rooflight upstands & kerbs in Corby: questions
Why is my rooflight cold around the edge?
Usually an uninsulated upstand. Insulating the kerb and lining the reveal fixes most cold spots.
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.
Is the survey in Corby free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
Do I need to be at home for the survey in Corby?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
