How we approach rooflight upstands & kerbs in Streatham
Rooflight upstands & kerbs in Streatham means insulated kerbs built and waterproofed to suit your rooflight. We cover the SW16 district and the rest of Greater London, with a survey before any price is fixed.
London homes often run deep from front to back, so the middle of the ground floor is the darkest space — exactly where an overhead rooflight earns its keep. Think of rooflight upstands & kerbs for roofs where the old kerb is low, cold or leaking.
From Streatham to Balham, Clapham and Mitcham, the same survey-first process applies: measure, specify, fix the price, then fit.
Specification options
- Proprietary insulated kerbs
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Internal plaster-box linings
- Raised upstands for deep green or ballasted roofs
- Upstand repairs and rebuilds
- Correct height above the finished roof
- Matched to your roof covering
Before you order: points to check
- Membrane compatibility with the rooflight's sealants
- Insulation continuity around the upstand affects condensation
Consents for rooflight upstands & kerbs in Streatham
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.
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. The Future Homes and Buildings Standards, published in March 2026, apply from 24 March 2027 and keep the 2.2 W/m²K limit for rooflights.
Our planning guide covers each nation in more detail.
What do rooflight upstands & kerbs cost in Streatham?
Prices below are shown including and excluding VAT. In Streatham, as elsewhere, making good inside and access equipment are the main variables.
| 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 |
The process, step by step
- Send the details. Postcode, rough size and a photo of the roof and room.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
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Questions about rooflight upstands & kerbs in Streatham
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.
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 Streatham?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Can you work alongside my builder in Streatham?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
