How we approach rooflight upstands & kerbs in Boston
Thinking about rooflight upstands & kerbs in Boston? The short answer: insulated kerbs built and waterproofed to suit your rooflight. The longer answer depends on your roof, which is why we survey before we price.
Midlands housing is a mix of Victorian terraces, inter-war semis and newer estates, and rear kitchen extensions with flat rooflights are a common upgrade. Typical uses for rooflight upstands & kerbs include roofs where the old kerb is low, cold or leaking.
We work across Lincolnshire, including Boston, and in neighbouring towns such as Spalding and Skegness. Access, parking and how the glass reaches the roof are all checked at the survey.
Options we can specify in Boston
- Raised upstands for deep green or ballasted roofs
- Upstand repairs and rebuilds
- Proprietary insulated kerbs
- Internal plaster-box linings
- Timber upstands with insulation
- Fixings and falls agreed with the rooflight maker
- Built square to the rooflight size
Before you order: points to check
- Membrane compatibility with the rooflight's sealants
- Upstand size must match the unit within a tight tolerance
Do you need permission in Boston?
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.
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.
Read the planning permission guide before you commit to a design.
Guide prices for Boston
These are typical supply-and-fit ranges. For an address in Boston, 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 |
The process, step by step
- Tell us what you have. Send the PE21 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits Boston, measures and checks structure and access.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Rooflight upstands & kerbs near Boston
More we do in Boston
Common questions
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 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.
Is the survey in Boston free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
Will I need planning permission in Boston?
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.
