Slim steel look bifold doors with high thermal performance
The Sieger Lux TH+ Bifold Door is a high-performance aluminium bifold system designed for projects where slim framing, improved thermal efficiency and smooth everyday operation all matter. It can be specified as a contemporary aluminium bifold or with integral glass divides for a steel look finish, giving homeowners, architects and developers greater design flexibility without losing sight of comfort, security or usability.
With an 84mm glass-to-glass hinge stile sightline, bottom-running free-glide carriages, concealed running gear and PAS 24 security, the Lux TH+ is ideal for premium homes, extensions, garden-facing elevations, commercial spaces and design-led projects where appearance and performance need to work together.
Sieger Systems supplies and installs high-performance aluminium bifold doors across London, Buckinghamshire, Berkshire, Oxfordshire, Hertfordshire, Surrey, Bath, Bristol and Somerset.
Premium performance
Bespoke made to order
Designed & made in the UK
PRODUCT FEATURES
Sieger lux TH+ bifold door features
High thermal performance
Slim 84mm sightline
Contemporary or steel look
PAS 24 security
To learn more about additional features:
Technical performance
| Thermal performance | Uw values from approx. 0.78-1.4 W/m²K |
| Sightline | 84mm glass-to-glass hinge stile sightline |
| Maximum size | Sashes up to 1.2m wide x 2.5m tall, with max set width of 6m |
| Configurations | Up to 6 sashes per set, single doors, French doors, open-in or open-out |
| Security | PAS 24 certified with 8-point locking and 3-star diamond cylinder |
| Weather protection | Air Class 4, water Class 9A and wind resistance up to Class A3 |
GLASS OPTIONS
- High-performance insulated glazing
- Double glazed units
- Solar control glass
- Laminated safety glass
- Integral glass divides for steel look designs
- Project-specific performance glass
- Switchable tinted glass
- Heated glass
