Stellar Slimline Bifold Door

Ultra-slim sashes for a contemporary look.

Product Features

  • U-values as low as 1.3 W/m²K - double glazed
  • U-values as low as 0.9 W/m²K - triple glazed
  • Up to seven sashes
  • Multipoint locking for the main door and shootbolts for high security
  • Meets new Part L requirements for thermal efficiency with standard 28mm double glazing
  • Double hinge fixing for reliable long-term performance
  • Parallel stainless-steel tracks for ease of operation and stability
  • Quad stainless-steel rollers with wiper brushes spread load and resist debris build-up
  • Robust corner cleat system for strong precise corners
  • Weather performance to BS6375-1 and cycle testing to BS6375-2
  • NEW low sightline integrated cill option


The Slimline Bifold Door is 20% slimmer by design than our original Stellar bifold. At just 117mm wide, the meeting stiles create an attractive ultra-slim sightline, letting the glass take centre stage for maximum appeal.

Uniquely, it offers 4mm of adjustment – no more cutting the last sash to size. It also enables the master sash to be easily adjusted on site. Coupled with Stellar’s patented fast-fit ‘knock-in’ beads and pre-inserted gaskets, low threshold options and PAS 24 security gearing, this door is packed with features that benefit the fabricator, installer and consumer alike.

The multi-chambered polyamide thermal break technology delivers a highly thermally insulating bifold that exceeds Part L requirements with standard 28mm double glazing and achieves 0.9 W/m²K U-value.

A new integrated cill option adds even more appeal, saving 35mm of height compared with a traditional bifold cill. It also uses fewer component parts and is quicker and easier to install, especially on refurbishment projects.

Product Case Study

Friday 1st July

Spectus windows and doors specified for an exclusive ne...

Tuesday 14th June

Optima windows and doors specified for townhouse develo...

Thursday 24th February

Profile 22 products fitted in Harrogate new build devel...


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