Product overview
Gable end windows are frameless structural glass installations designed to fill the triangular end of a roofline with clean, uninterrupted glazing. Using the Invisio structural glazing system, Sieger can create large frameless window structures that introduce natural light into loft rooms, upper floors and vaulted spaces while giving the building a more modern architectural appearance.
The Invisio system uses thermally broken fixing details, hidden support options and tested structural performance, allowing gable end glazing to feel minimal without compromising comfort, insulation or reliability. This makes it ideal for homes where a dark loft space, upper floor or roofline elevation needs to be transformed with light and clear views.
Sieger Systems supplies and installs frameless gable end windows and structural glass systems across London, Buckinghamshire, Berkshire, Oxfordshire, Hertfordshire, Surrey, Bath, Bristol and Somerset.
Premium performance
Bespoke made to order
Designed & made in the UK
PRODUCT FEATURES
Product features
Frameless gable glazing
Thermally broken Invisio system
Ideal for loft spaces
Tested structural performance
To learn more about additional features:
Technical performance
| System type | Frameless structural gable end window using the Invisio fixing system |
| Profile depth | 63mm Invisio | 72mm Invisio+ |
| Maximum glass thickness | 41.5mm Invisio | 62mm Invisio+ |
| Thermal performance | Expected Uw from 1.1 W/m²K Invisio | 0.6 W/m²K Invisio+ |
| Typical gable scenario | SC2 four edge supported multiple pane with silicone jointed glass |
| Tested performance | Thermal and wind load testing across multiple structural glass scenarios |
GLASS OPTIONS
- Double glazed units
- Insulated glass units up to 41.5mm for Invisio
- High-performance glass units up to 62mm for Invisio+
- Low-E coated glass
- Argon-filled insulated glass units
- Solar control glass
- Laminated glass units
- High-strength interlayers
- Coloured interlayers
- Acoustic damping interlayers
