How we approach rooflight upstands & kerbs in Blackburn
Rooflight upstands & kerbs in Blackburn means insulated kerbs built and waterproofed to suit your rooflight. We cover the BB1 district and the rest of Lancashire, with a survey before any price is fixed.
Converted mills and warehouses in the North West often have large rooflights or glass roofs that need specialist replacement. In Blackburn, as anywhere, rooflight upstands & kerbs are the usual choice for roofs where the old kerb is low, cold or leaking.
Jobs in Blackburn 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
- Upstand repairs and rebuilds
- Proprietary insulated kerbs
- Built square to the rooflight size
- Insulated to avoid a cold bridge
Before you order: points to check
- Upstand size must match the unit within a tight tolerance
- Membrane compatibility with the rooflight's sealants
Planning and building rules for Blackburn
Most rooflights on English houses do not need planning permission, provided they keep within 150 mm of the roof surface and below the ridge line. 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. Replacing a rooflight or roof window can be self-certified by an installer registered with an authorised competent person scheme; otherwise building control approval is needed.
Our planning guide covers each nation in more detail.
Guide prices for Blackburn
These are typical supply-and-fit ranges. For an address in Blackburn, 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 |
What happens next
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Blackburn address.
- Measure and check. A surveyor visits Blackburn, measures and checks structure and access.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
More we do in Blackburn
Common questions
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 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 Blackburn?
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 Blackburn free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
