How we approach glass links & glass box roofs in St Austell
For St Austell homes and buildings we offer glass links & glass box roofs: frameless glass links joining old and new buildings. We measure first, specify to the opening and confirm any planning or building-control points before quoting.
Stone cottages, slate roofs and conservation areas are common in the South West, and conservation-profile rooflights keep the roofline quiet. In St Austell, as anywhere, glass links & glass box roofs are the usual choice for listed and period buildings where the old wall should stay visible.
We work across Cornwall, including St Austell, and in neighbouring towns such as Bodmin and Truro. Access, parking and how the glass reaches the roof are all checked at the survey.
Specification options
- Heated glass on some systems
- Frameless sliding or pivot doors
- Concealed gutters and drainage
- Frameless or slim-framed glass
- Solar-control and low-iron glass
- Designed around the existing building
- Can include frameless doors
What to check first
- Structural calculations are part of the design
- Thermal performance of large glass areas must be calculated
Planning and building rules for St Austell
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.
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. 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 St Austell
Guide prices for glass links & glass box roofs in St Austell 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 |
|---|---|---|
| Fully frameless link with glass beams | £20,395 – £35,995 | £16,995 – £29,995 |
| Glass roof and glazed sides Typical | £13,195 – £20,395 | £10,995 – £16,995 |
| Glass roof between existing walls | £9,595 – £13,195 | £7,995 – £10,995 |
The process, step by step
- Tell us what you have. Send the PL25 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits St Austell, measures and checks structure and access.
- 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.
Neighbouring towns
Other services in St Austell
Glass links & glass box roofs in St Austell: questions
Can a glass link be warm enough to use all year?
With insulated glass units, solar control and good detailing, yes — though it will always be brighter and more exposed to temperature swings than a solid room.
How long does a link take?
Design and manufacture are the long part. Fitting is often two to five days.
Who designs it?
Your architect, or we produce a survey-based design that the glass manufacturer engineers.
Can you work alongside my builder in St Austell?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
How do I book a survey in St Austell?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
