Folding BiFold
Engineered for Luxury. Built for Performance. A bespoke premium aluminium bi-fold door system that transforms how buildings connect with the outdoors.
UK Manufactured · 89mm Frame Sightlines · Over 25 Configurations · PAS 24 Security · 50,000 Cycle Durability
Premium Aluminium Bi-Fold Doors for Architects, Designers & Visionary Homeowners
The Granada Glazing Folding BiFold range is the pinnacle of modern architectural innovation. Designed to seamlessly merge indoor and outdoor living, our luxury bi-fold doors combine exceptional strength, ultra-slim sightlines, and effortless operation - every door engineered with uncompromising attention to detail.
Whether for a luxury new build, a premium extension, or a high-specification commercial project, the Folding BiFold delivers a bespoke solution that enhances both style and space - crafted entirely at our Yorkshire facility.
Performance Specifications
Reference test: 3.73 m × 2.50 m - 3 sashes. Security test: 3 sashes configuration 321, 2.70 m × 2.50 m.
| Property | Class / Value |
|---|---|
| Thermal Transmittance (Uw) | ≥ 0.8 W/m²K* |
| Air Permeability | Class 4 |
| Water Tightness | Class E750 |
| Wind Resistance | Class C3 |
| Repeated Openings (main door) | 50,000 cycles |
| Repeated Openings (even sashes) | 25,000 cycles |
| Security | Passed (enhanced option) |
*Uw from 1.2 W/m²K. Uw 0.8 W/m²K achievable with double glazing Ug=1 and psi=0.036
Why Choose Our Folding BiFold?
At Granada Glazing, we don't just supply products - we craft architectural statements. Every Folding BiFold is built using premium-grade aluminium and finished to rigorous standards, combining elegant hardware with our own UK-manufactured frames for unrivalled performance and style.
- Manufactured in the UK at our state-of-the-art Yorkshire facility
- 89mm frame and 110mm panel sightlines for maximum glazing
- Over 25 configuration variants - inward, outward, corner sash and more
- Adjustable jambs and adjustable toe and heel in glazing for on-site precision
- Double bearing system with gimbal stabiliser for smooth, reliable operation
- Pre-gasketed bead for faster manufacturing and reliable weather sealing
- 45mm thermal break with Uw from 1.2 W/m²K
- Flush threshold option for seamless step-free access
Thermal Performance
A 45mm thermal break in both frame and sash delivers Uw from 1.2 W/m²K, with Uw ≥ 0.8 W/m²K achievable with enhanced glazing. The 48mm glazing capacity supports the highest-performance sealed units.
- 45mm thermal break (frame & sash)
- Uw from 1.2 W/m²K (≥ 0.8 achievable)
- Up to 48mm glazing capacity
80mm Frame, 110mm Central Sightline
An 80mm deep frame with a slim 110mm central meeting stile maximises the glazed area, separating environments while flooding spaces with natural light.
- 80mm frame and sash section
- 110mm slim central sightline
- 48mm glazing capacity
- 1.8mm door profile thickness
Security Option
Choose our enhanced security option for multi-point locking, shoot bolt locking, and PAS 24-compliant hardware – delivering the security performance required for residential and commercial specifications.
- Multi-point lock with shoot bolt locking
- Corner lock available
- PAS 24 hardware (enhanced option)
Precision Engineering
Double bearing system with gimbal stabiliser for smooth, reliable operation over 50,000 cycles. Pre-assembled gaskets speed up manufacturing and improve sealing. Adjustable jambs and toe/heel for a perfect on-site fit.
- Double bearing system with gimbal stabiliser
- Pre-assembled gaskets – faster installation
- Adjustable jambs, toe and heel
- 50,000 cycles (main door), 25,000 (even sashes)
Maximum Sash Dimensions
All sizes are for guidance only. Maximum weight and dimensions vary by typology – please contact our technical team for project-specific advice.
| Dimension / Spec | Value |
|---|---|
| Max Sash Width (L) | 1,200mm |
| Max Sash Height (H) | 3,000mm |
| Max Sash Weight | 120kg |
| Glazing (min–max) | 25mm – 48mm |
| Frame Section | 80mm |
| Sash Section | 80mm |
| Polyamide Strip (frame & sash) | 45mm |
| Profile Thickness (door) | 1.8mm |
Opening & Configuration Options
- Inward opening – up to 14 sashes
- Outward opening – up to 14 sashes
- 90° corner sash without mullion
- Flush step-free threshold option
- Multiple cill and drainage sub-sill options (105mm, 165mm, 195mm, 245mm)
Reference test: 3.73 m × 2.50 m – 3 sashes. Contact our technical team for project-specific advice.
Finishing Options
Our Folding BiFold is available in a comprehensive range of high-quality finishes applied at our in-house powder-coating plant in Yorkshire. Every colour is applied consistently across frame, sash, and hardware for a fully coordinated installation.
RAL 9016
RAL 7016
RAL 9005
RAL 9001
RAL 7035
RAL 6009
RAL 5010
Int. / Ext.
Standard, mottled and rough texture finishes across 150+ RAL colours.
Different colours inside and out – match your interior and exterior independently.
Premium metallic finish for contemporary and commercial architectural projects.
Realistic timber-look powder coating for warmth in mixed-material schemes.
Specialist coating for healthcare, hospitality and public-sector applications.
Contact our team to discuss colour matching or to request a physical sample for your project.
Glazing Options
The Folding BiFold accepts glazing units from 25mm minimum to 48mm maximum – giving you the widest specification range of any system in this class and supporting everything from standard installations to near-Passive House performance.
| Glazing Width | Description |
|---|---|
| 25mm (min) | Minimum unit width. Lightweight option for standard applications where sash weight is a priority. |
| 28mm – 32mm | Standard double-glazed sealed unit range. Suitable for most residential and commercial applications. |
| 48mm (max) | Maximum capacity unit. Supports Uw ≥ 0.8 W/m²K with double glazing Ug=1 and psi=0.036 – recommended for high-specification and near-Passive House projects. |
Contact our technical team to specify the right glazing for your project, including glass type, low-E coatings, laminated safety glass, and any security upgrades.
Technical Specification Documents
Download the full technical documentation for our Folding BiFold system. Brochures, performance data sheets, drainage profiles, and opening variant guides are available below to support your specification from design to delivery.
Discuss your Folding BiFold project with us
Whether you're specifying a luxury residential development, a high-specification commercial build, or a premium architectural project, our technical team is ready to help. Complete our enquiry form or call us directly on 01909 499899 to discuss your requirements.
Alternatively, call us today on 01909 499899