How we approach glass links & glass box roofs in Castlereagh
Thinking about glass links & glass box roofs in Castlereagh? The short answer: frameless glass links joining old and new buildings. The longer answer depends on your roof, which is why we survey before we price.
Wind and rain off the Atlantic make upstand and flashing details important on Northern Irish roofs. Typical uses for glass links & glass box roofs include listed and period buildings where the old wall should stay visible.
Neighbouring towns include Belfast (4 km) and Newtownabbey (10 km). We offer a survey date when we reply to your enquiry.
Choices for your Castlereagh project
- Solar-control and low-iron glass
- Structural glass beams and fins
- Heated glass on some systems
- Concealed gutters and drainage
- Frameless or slim-framed glass
- Designed around the existing building
- Structural glass roof with concealed fixings
What to check first
- Listed building consent or planning permission is commonly needed
- Structural calculations are part of the design
Planning, building control and Castlereagh
In Northern Ireland, roof alterations come under Class B of the 2015 order: a rooflight facing a road must not project more than 15 cm and must sit at least 0.5 m from the ridge, eaves, verge and party wall. Listed buildings also need listed building consent from the council.
For homes in Northern Ireland, Technical Booklet F1 sets 1.6 W/m²K (or WER Band C) for replacement glazing including rooflights. New dwellings must average 1.40 W/m²K across windows, roof windows and rooflights.
See our building regulations guide for U-values, glazing limits and self-certification.
What do glass links & glass box roofs cost in Castlereagh?
These are typical supply-and-fit ranges. For an address in Castlereagh, 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 |
|---|---|---|
| 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
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Castlereagh address.
- Survey. We measure the opening, check the roof build-up and agree the options.
- 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.
Neighbouring towns
Related work in Castlereagh
Glass links & glass box roofs in Castlereagh: questions
Who designs it?
Your architect, or we produce a survey-based design that the glass manufacturer engineers.
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 is the glass joined to the old wall?
Usually by a slim channel or flashing set into the masonry, sealed and weathered so the old wall can move without cracking the glass seal.
Can you work alongside my builder in Castlereagh?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Do I need to be at home for the survey in Castlereagh?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
