Glass links & glass box roofs in Caerphilly: what is involved?
Glass links & glass box roofs in Caerphilly means frameless glass links joining old and new buildings. We cover the CF83 district and the rest of Gwent, with a survey before any price is fixed.
Wales sees a lot of wind-driven rain, particularly in the west, so upstand height and flashing laps matter more than anywhere. Glass links & glass box roofs suit listed and period buildings where the old wall should stay visible.
Neighbouring towns include Risca (9 km) and Pontypridd (9 km). We offer a survey date when we reply to your enquiry.
Options we can specify in Caerphilly
- Heated glass on some systems
- Concealed gutters and drainage
- Frameless or slim-framed glass
- Frameless sliding or pivot doors
- Solar-control and low-iron glass
- Can include frameless doors
- Bright circulation space
Before you order: points to check
- Listed building consent or planning permission is commonly needed
- Thermal performance of large glass areas must be calculated
Planning and building rules for Caerphilly
In Wales a rooflight on a house is usually permitted development if it stands no more than 15 cm proud of the roof, except on protected land such as conservation areas and National Parks, where permission is needed. A side-facing rooflight within 10.5 m of the boundary must be obscure-glazed, and non-opening unless the opening part is more than 1.7 m above the floor.
In Wales the limiting values are 2.2 W/m²K for a rooflight and 1.4 W/m²K (or WER Band B) for a roof window in an existing house. A revised Welsh Approved Document L takes effect on 4 March 2027; rooflights in new dwellings stay at 2.2 W/m²K.
See our building regulations guide for U-values, glazing limits and self-certification.
Guide prices for Caerphilly
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| 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 Caerphilly 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
Other services in Caerphilly
Glass links & glass box roofs in Caerphilly: questions
Is structural glass safe?
Structural glass is laminated so it stays in place if a ply breaks. The manufacturer designs it for the loads involved.
Who designs it?
Your architect, or we produce a survey-based design that the glass manufacturer engineers.
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 Caerphilly?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Is the survey in Caerphilly free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
