Elevate Your Home with Bristol’s Specialist Window & Door Manufacturer.
Double Glazing, Bristol, Yate & South Gloucestershire
Premium Aluminium Bi‑Fold Doors
Open your home to light, views and effortless indoor‑outdoor living with Cortizo Bi‑Fold Plus. This next‑generation aluminium folding door combines slim sightlines with high thermal and acoustic performance, smooth operation and superb versatility—equally at home in modern extensions or refined refurbishments.
Why Choose Bi‑Fold Plus?
- Slim, contemporary look – A reduced central meeting stile of 110 mm maximises the glazed area and fills your room with natural light.
- High performance, year‑round – Advanced thermal break design and generous glazing capacity deliver excellent insulation and comfort in every season.
- Built for daily life – Smooth, reliable folding action and durability tested to 50,000 cycles on the traffic panel (25,000 on paired sashes).
- Flexible layouts – From compact two‑leaf sets to expansive openings with up to 14 sashes, inward or outward opening to suit your space.
Performance at a Glance
- Thermal efficiency: Whole‑door transmittance Ud from ~1 W/m²K (dependent on size and glass specification).
- Weather testing: Air Class 4, Water Class E750, Wind Class C3 for proven protection in demanding UK conditions.
- Repeated openings: Tested to 50,000 cycles (main door)
Design & Configuration Options
- Opening types: Inward or outward opening, 1–14 sashes, with popular traffic‑door arrangements for everyday access.
- Large panel sizes: Individual sash dimensions up to 1200 mm wide × 3000 mm high, 120 kg max sash weight (check configuration for limits).
- Glazing choices: Double or triple glazing with units up to 48 mm for enhanced thermal and acoustic performance.
Smooth. Solid. Built to Last.
Bi‑Fold Plus is designed for daily ease-of-use—precision rollers and robust hardware deliver a smooth, reassuring action, while factory‑friendly details such as pre‑assembled gaskets support consistent quality from fabricator to site. Durability testing up to 50,000 open/close cycles demonstrates long‑term reliability in busy homes.
Technical Summary
- Frame & sash depth: 80 mm system (thermally broken)
- Thermal break: 45 mm polyamide bars for insulation performance
- Sightlines: 110 mm meeting stile for a cleaner, lighter look
- Tested performance: Air Class 4 / Water E750 / Wind C3; PAS 24 approved (spec‑dependent)
- Durability: Up to 50,000 cycles (traffic sash) / 25,000 (paired sashes)
- Thermal efficiency: Whole‑door transmittance Ud from ~1 W/m²K (dependent on size and glass specification).
(Performance and U‑values vary with size, configuration and glazing)
Ideal Applications
- Rear extensions and kitchen/diner refurbishments seeking a wide opening and slim, modern lines
- Garden rooms and orangeries where abundant light and reliable weathering are essential
- Matching with Cortizo sliders and windows for a fully coordinated aluminium package
Transform Your Living Space With the Premium Bifold-Plus door
Whether you’re planning a full-width opening, replacing older patio doors or creating a modern extension, the Cortizo 4700 offers the perfect blend of performance, style and practicality.
👉 Contact Yate Windows today for a free quote, site survey or to view colour samples.
Or download our Bi-Fold brochure – HERE.
