GBS-78A is an ideal choice for low energy projects. With FSC® certified timber and low U values, the aluminium clad windows enhance the style and design of your project externally whilst maintaining the warmth and beauty of timber from the inside. 78 refers to the depth of the window frame (before aluminium cladding).
Links to technical drawings, PHPP 10 information and declarations can be found on our technical page.
Due to the complexity of specifying our products, we have a minimum order policy. To realise the benefits of triple glazing, including the continuity of thermal performance, we only recommend replacing windows throughout all of your home for replacement or retrofit projects.
Outward opening
A flush casement window hung from the top or side.
• U value: 0.76 W/m2K
• Triple unit: Argon fill 52mm
• Light transmission value: 73%
• Triple glazed as standard
Inward opening
Tilt and turn window options.
- U value: 0.75 W/m2K
- Triple unit: Argon fill 52mm
- Light transmission value: 73%
- Triple glazed as standard
Tend to be single doors, usually inward opening. A range of options are available.
- U value: 0.87 W/m2K
- Inward and outward opening entrance doors
- A range of standard and contemporary designs
- Aluminium-clad doors available
- Insulated frame option
- Dual compression seals for long-term airtightness
- Secured by Design option
Available as inward or outward opening double doors.
- U value: 0.82 W/m2K
- Ideal for low energy retrofits and newbuilds
- Dual compression seals for long term airtightness
- CAD drawings available on request
- Maximum size 2200mm x 2400mm
- Triple glazed as standard
One of the most energy efficient lift & slide doors available in the UK.
- U value: 0.75 W/m2K
- One pane of the door slides behind the other, with options for one pane or both panes sliding
- Ideal for low energy retrofits and newbuilds
- Dual compression seals for long term airtightness
- CAD drawings available on request
- Maximum size 2200mm x 2400mm
- Triple glazed as standard