How we approach rooflight upstands & kerbs in Chorley
Rooflight upstands & kerbs in Chorley means insulated kerbs built and waterproofed to suit your rooflight. We cover the PR7 district and the rest of Lancashire, with a survey before any price is fixed.
Rear kitchen extensions on North West semis often have small domes from decades ago that leak or have yellowed. Rooflight upstands & kerbs suit roofs where the old kerb is low, cold or leaking.
Jobs in Chorley are planned around access: whether the roof can be reached from the garden, whether a hoist or crane is needed, and where we can park. We check this when we measure.
Specification options
- Internal plaster-box linings
- Upstands to suit single-ply, felt, GRP or liquid roofs
- Timber upstands with insulation
- Proprietary insulated kerbs
- Raised upstands for deep green or ballasted roofs
- Fixings and falls agreed with the rooflight maker
- Membrane dressed up and sealed
Before you order: points to check
- Insulation continuity around the upstand affects condensation
- Minimum upstand height is set by the rooflight manufacturer — commonly 150 mm above the finished roof
Planning and building rules for Chorley
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.
For English homes the energy rules ask for rooflights of 2.2 W/m²K or better and roof windows of 1.4 W/m²K (or WER Band B); most modern double glazed units meet both. 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.
Guide prices for Chorley
Prices below are shown including and excluding VAT. In Chorley, 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 |
How the job runs
- Send the details. Postcode, rough size and a photo of the roof and room.
- Measure and check. A surveyor visits Chorley, 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.
Nearby towns
Other services in Chorley
Common 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.
Does every rooflight need an upstand?
Flat and dome rooflights do. Pitched roof windows use flashing kits instead.
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 you work alongside my builder in Chorley?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Do you offer rooflight upstands & kerbs in Chorley?
Yes. We carry out rooflight upstands & kerbs in Chorley and across Lancashire. Send your postcode and we will offer a survey date when we reply.
