Ideal for both residential and commercial applications, the BSF70 HI bi-fold combines slim, modern sightlines with proven performance — making it a dependable choice for installers, developers and architects seeking a premium, compliant aluminium folding system.
BSF70 HI Bi-Fold Door
High-Performance Aluminium Bi-Folding System for Trade Installers
BSF70 HI Bi-Fold Door
High-Performance Aluminium Bi-Folding System for Trade Installers
The BSF70 HI is a versatile, high-insulation aluminium bi-fold door system engineered for outstanding performance and smooth operation.
Design & Aesthetic Features
The BSF70 HI maintains a clean aesthetic with slim meeting stiles of 140mm and a unique flush line pop-out handle that allows for square flush stacking panels when doors are fully open, helping create bright, open internal spaces with minimal visual interruption.
Precision-engineered hardware and strong rollers deliver consistent, smooth operation — ideal for high-traffic residential areas and commercial access points.
With open-in and open-out options, panel configurations from 1 to 7 panels, PAS24 testing, and a low-threshold option, the BSF70 offers the flexibility needed to suit a wide range of project requirements.
The BSF70 HI accepts 24–40 mm glazing, enabling a range of double- or triple-glazed units to boost thermal efficiency, security or acoustic performance.
Technical Specification
| Specification | BSF70 HI Value |
|---|---|
| U-value (double glazing) | From 1.4 W/m²K |
| U-value (triple glazing) | From 1.1 W/m²K |
| Air tightness | Class 4 (600 Pa) |
| Water tightness | Class 9A (600 Pa) |
| Wind load resistance | Class AE2400 (2400 Pa) |
| Security | PAS 24 certified option available |
| Max vent weight | 130 kg |
| Max panel width x height | 1200 x 3000 mm |
| Glazing thickness | 28–44 mm |
FAQ
What makes the BSF70 HI different from the standard BSF70 system?
The HI (High Insulation) variant features enhanced thermal performance, helping installers meet modern building regulations while maintaining the same slim sightlines and flexible configurations of the standard system.
What glazing thicknesses can the BSF70 HI accommodate?
The system supports 28–44 mm glazing, allowing installers to use double or triple glazing depending on the thermal or acoustic requirements of the project.
Is the BSF70 HI suitable for PAS 24 compliance?
Yes — the BSF70 HI can be specified to meet PAS 24 security requirements, making it suitable for new-builds and projects needing compliant entrance solutions.
What are the maximum panel sizes for the BSF70 HI?
The system handles panel heights up to 3000 mm and vent weights up to 130 kg, enabling large openings and a wide range of multi-panel configurations.
Can the BSF70 HI be installed with a low or flush threshold?
Yes — the system offers standard (54mm) and low threshold (34mm) option, giving installers flexibility for accessibility requirements and seamless indoor–outdoor transitions.
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