Performance Overview
Weather Performance
Independently Weather Performance Tested to BS 6375-1.
Air Infiltration BS EN 1026 | Class 4 |
Watertightness BS EN 1027 | Class 9A |
Wind Resistance BS EN 12211 | E1800 |
Size Limitation
Door Sash | Door Sash Width | Door Sash Height |
Maximum | 1000 | 2500 |
Minimum | 700 | 1900 |
Security
To ensure your home is protected, the Bi-Fold door incorporates high security locking mechanisms throughout. The door has been designed and tested to comply with security standard PAS24 in accordance with the criteria for Secure by Design. All glazing units are internally beaded.
BREEAM Sustainability Rating
A+ Rating
Window Energy Rating
A+
Materials
Aluminum profiles are extruded from aluminium alloy 6060T6, T5 or T4 complying with the recommendations of BS EN 12020-2 / BS EN 755-Parts 1 to 9. Polyamide thermal breaks are produced from glass reinforced nylon sections designed to withstand temperatures in excess of 200°C, allowing the sections to be powder coated after thermal breaking.
Construction
Frame and door sash members are mitre cut at 45°. Corners are reinforced with extruded aluminium crimping cleats and corner braces. A secure joint is formed by pneumatically crimping into the extruded crimping cleat. Mullion and transom bars are square cut, shaped and fixed securely to the frame by means of stainless steel screws and fixing cleats. All frame joints are sealed during construction against entry of water using Metal Technology’s two part adhesive. Metal Technology recommend that only A2 or A4 austenitic (300 series/class 70) stainless steel fixing screws are used in the assembly of their products.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
1. Anodised to BS EN 12373-1 or BS 3987
2. Powder organic coated to BS 6496 or BS EN 12206-1
The system 26Hi/Hi+ Door can accommodate a different colour/finish internally to that used externally. Metal Technology's powder coating is produced to Qualicoat standards.
Glazing
This system offers internally glazed sashes and can accommodate glazing units from 28mm to 50mm units.
Materials
Aluminum profiles are extruded from aluminium alloy 6060T6, T5 or T4 complying with the recommendations of BS EN 12020-2 / BS EN 755-Parts 1 to 9. Polyamide thermal breaks are produced from glass reinforced nylon sections designed to withstand temperatures in excess of 200°C, allowing the sections to be powder coated after thermal breaking.
Construction
Frame and door sash members are mitre cut at 45°. Corners are reinforced with extruded aluminium crimping cleats and corner braces. A secure joint is formed by pneumatically crimping into the extruded crimping cleat. Mullion and transom bars are square cut, shaped and fixed securely to the frame by means of stainless steel screws and fixing cleats. All frame joints are sealed during construction against entry of water using Metal Technology’s two part adhesive. Metal Technology recommend that only A2 or A4 austenitic (300 series/class 70) stainless steel fixing screws are used in the assembly of their products.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
1. Anodised to BS EN 12373-1 or BS 3987
2. Powder organic coated to BS 6496 or BS EN 12206-1
The system 26Hi/Hi+ Door can accommodate a different colour/finish internally to that used externally. Metal Technology's powder coating is produced to Qualicoat standards.
Glazing
This system offers internally glazed sashes and can accommodate glazing units from 28mm to 50mm units.
Thermal Performance
Metal Technology’s Bi-Fold doors offer exceptionally low U values using bespoke polyamide thermal isolators designed to minimise heat transfer across the door profiles. This can be further enhanced with a high insulation (Hi+) option of uniquely designed cellular foams which enclose internal cavities within the profile, further reducing heat loss and providing one of the most thermally efficient systems available.
Achievable whole window u-values | Centre pane u-values | |
1.0w/m2k | 0.5w/m2k | |
System 26Hi Bi-Fold * | 1.58w/m2k | 1.19w/m2k |
System 26Hi+ Bi-Fold * | 1.34w/m2k | 0.95w/m2k |
* Door U values based on 3000 x 2200m three pane Bi-fold using warm edge swiss spacer V bars and fully rebated thresholds.
Metal Technology can provide tailored U-value calculations using their dedicated estimating software to calculate overall project average door U-values for their full range of systems.