Rooflight upstands & kerbs for Crawley: the essentials
Rooflight upstands & kerbs in Crawley means insulated kerbs built and waterproofed to suit your rooflight. We cover the RH11 district and the rest of West Sussex, with a survey before any price is fixed.
Many South East homes have been extended more than once, and an old dome over an earlier extension is often due for replacement. Think of rooflight upstands & kerbs for new flat-roof openings and rooflight replacements.
Crawley is the main town we list in West Sussex; we also cover nearby Horley and Horsham.
What you can choose
- Proprietary insulated kerbs
- Internal plaster-box linings
- Upstand repairs and rebuilds
- Timber upstands with insulation
- Raised upstands for deep green or ballasted roofs
- Built square to the rooflight size
- Matched to your roof covering
Things we check at survey
- Membrane compatibility with the rooflight's sealants
- Upstand size must match the unit within a tight tolerance
Planning, building control and Crawley
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.
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. 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.
Read the planning permission guide before you commit to a design.
What do rooflight upstands & kerbs cost in Crawley?
Guide prices for rooflight upstands & kerbs in Crawley 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 |
What happens next
- Tell us what you have. Send the RH11 postcode, a rough size and a couple of photos.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Rooflight upstands & kerbs near Crawley
More we do in Crawley
Rooflight upstands & kerbs in Crawley: questions
What roof coverings do you work with?
Single-ply, EPDM, felt, GRP and liquid-applied systems — or we coordinate with your roofer.
Can an old upstand be reused?
If it is sound, square, insulated and the right size. Often it is cheaper to rebuild than adapt.
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.
Will I need planning permission in Crawley?
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.
Can you work alongside my builder in Crawley?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
