Aluminium Windows Ireland: X2C Slim Casement System
X2C -Aluminium windows
For homeowners who want a cleaner, more modern finish, aluminium windows Ireland remain one of the most attractive options.
The X2C is Bright Vista Group’s thermally broken aluminium casement window for Ireland: a slim, high-performance system suited to contemporary homes, extensions, and architect-led builds across Dublin and nationwide.
Thermally broken aluminium windows work by separating the internal and external sections of the frame with a polyamide bar, preventing cold from bridging across the frame. The result is a window that delivers the structural strength and slim 55mm sightlines of aluminium without the heat loss that older non-broken aluminium frames were known for. Ireland’s climate, with sustained Atlantic rain and cold winters, makes thermal performance a priority rather than a bonus.
X2C Technical Profile:
The X2C uses thermally broken aluminium construction throughout, engineered to handle Ireland’s weather while delivering slim architectural sightlines and strong energy performance.
Slim 55mm Profile
Ultra-slim 55mm frame width maximises the glass-to-frame ratio, allowing more natural light and delivering the architectural sightlines sought in contemporary Dublin homes and extensions.
Thermal Break
Polyamide thermal bar technology for enhanced heat retention.
Weather Rating
Tested to Class 9A water tightness and Class 4 air-tightness under EN 14351-1. Suitable for exposed coastal sites across Ireland.
Opening Styles
Available in top-hung, side-hung, and fixed-pane configurations.
That makes X2C a strong fit for extensions, renovations, and new builds where the design matters as much as the performance. Many clients want modern windows that look sharp from the outside, feel refined inside the home, and still perform well in Irish weather.
The aluminium casement design suits everyday use. Side-hung and top-hung configurations offer straightforward ventilation control. Available in a full RAL colour range on the external face, the X2C can be specified to match any external palette from anthracite grey to cream white, while the internal finish can differ for a two-tone effect.
For most clients the main draw is the balance between slim profile and strong performance. A 55mm sightline is significantly narrower than most uPVC alternatives, which typically run 70-80mm. That slimmer frame translates directly into more glass, more light, and a cleaner external elevation.
The Irish climate makes weather performance non-negotiable. Ireland receives between 750 and 1,400mm of rainfall per year, and exposed western and coastal sites face salt-laden air alongside high wind loads. The X2C’s Class 9A water tightness rating and polyamide thermally broken frame are specified to handle these conditions over decades, without the corrosion, warping, or repainting that affects timber and uPVC frames in exposed locations.
At Bright Vista Group Ltd, the X2C system is for clients who want a more refined and modern answer to residential glazing. It combines slim profile windows, structural strength, and a clean finish in one practical product. For homes where style, light, and long-term quality all matter, it offers a strong and attractive choice.
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Aluminium Windows Dublin and Greater Dublin Area
Bright Vista Group supplies and installs X2C thermally broken aluminium windows across Dublin and the surrounding commuter counties, including Kildare, Meath, Wicklow and Louth. Our showroom at the JFK Enterprise Centre in Bluebell, Dublin 12 allows buyers, architects and developers to see the X2C system full-size before specifying. We also work on projects nationwide from our Dublin base.
Why Choose Aluminium Windows Over uPVC or Timber
| Aluminium (X2C) | uPVC | Timber | |
|---|---|---|---|
| Frame width | 55 mm | 70–80 mm | 68–75 mm |
| Maintenance | None | None | Repaint every 5–10 yrs |
| Lifespan | 45–60 years | 20–35 years | 20–40 years (maintained) |
| Design flexibility | Full RAL palette, dual colour | Limited colours | Paintable |
| Thermal performance |
From 1.0 W/m²K thermally broken |
From 0.9 W/m²K | From 0.9 W/m²K |
| SEAI grant eligible | Yes | Yes | Yes |
| Best for | Contemporary homes, slim sightlines | Budget-conscious upgrades | Period properties |
U-values reflect typical double-glazed units. Triple-glazed configurations improve performance across all frame types.
Where X2C Aluminium Windows Are Used
The X2C is specified across a range of project types in Ireland:
- Extensions and sunrooms: slim sightlines maximise glass area and natural light in added spaces
- New builds and self-builds: works from architect drawings, coordinated with BER targets
- Apartment developments: commercial-volume supply, consistent spec across multiple units
- Contemporary renovations: replaces older aluminium, uPVC or timber frames with a modern slim profile
- Dublin city terraces: slim frames suit the proportion of Georgian and Edwardian properties where planning does not require traditional timber
X2C Aluminium Windows and the 2026 SEAI Grant
The X2C thermally broken aluminium system meets the SEAI Windows and Doors Grant 2026 U-value requirement of 1.4 W/m²K. For eligible homeowners, the grant provides up to €3,000 toward replacement windows in a semi-detached or end-terrace home, and up to €4,000 for a detached house. Bright Vista Group is an SEAI-registered contractor (No. 19930) and provides all supporting documentation.
Frequently Asked Questions
Aluminium Windows Ireland
Thermally broken means the aluminium frame is separated into internal and external sections by a non-conductive polyamide bar. This prevents heat from conducting directly through the metal frame to the cold outside air, improving the whole-window U-value and eliminating the cold-frame condensation associated with older non-broken aluminium windows.
The X2C uses a thermally broken frame with a 55mm slim profile, Class 9A water tightness rating, and EN 14351-1 CE marking. Standard or older aluminium windows typically use non-broken solid aluminium frames that conduct cold directly through the frame. The thermally broken construction makes the X2C suitable for Irish weather and SEAI grant-eligible.
The X2C has a 55mm frame width, which is significantly narrower than most uPVC frames (typically 70-80mm) and many timber frames. The slim profile means more of the opening is glazed, which increases natural light and creates the clean architectural look common in contemporary Irish homes.
Yes. The X2C thermally broken system meets the SEAI Windows and Doors Grant U-value requirement of 1.4 W/m²K. Bright Vista Group is an SEAI-registered contractor under No. 19930 and can supply the product Declarations of Performance required for your grant application.
Yes. Bright Vista Group supplies and installs X2C thermally broken aluminium windows across Dublin and the Greater Dublin Area, with a showroom at the JFK Enterprise Centre, Bluebell, Dublin 12. We also work on projects throughout Ireland from our Dublin base.