Performance Overview
Weather Performance
Independently Weather Performance Tested to BS 6375-1
Air Infiltration BS EN 1026 | Class 4 at 600Pa |
Watertightness BS EN 1027 | Class 9A at 600Pa |
Wind Resistance BS EN 12211 | Class E2400 at 3600Pa |
Air Leakage at 50Pa | 0.64 m3/h/m2 |
Materials
Aluminium 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.
Construction
The system shall be fabricated in ladder modules using a two-piece mullion assembly to be snapped together on site. The frame members shall be square cut and fixed securely to the frame by means of stainless steel screws driven into integral screw ports within the sections. All frame joints are sealed during construction against entry of water using Metal Technology's small gap sealant with glazing tape applied over the front face of each joint. Metal Technology recommends that only A2 or A4 austenitic stainless steel fixing screws are used in the assembly of their products.
Carefully designed fixing brackets have been developed for System 8 to allow a secure and simple fix so that all loads can be transferred back to the building’s main structural form with ease.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
- Anodised to BS1615 or BS3987 or BS EN 12373-1
- Powder organic coated to BS6496 or BS EN 12206-1
Metal Technology's powder coating is produced to Qualicoat standards. The System 8 curtain walling can accommodate a different colour/finish internally to that used externally.
Glazing
The system is externally glazed and can accommodate glazing units from 6mm to 36mm.
Materials
Aluminium 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.
Construction
The system shall be fabricated in ladder modules using a two-piece mullion assembly to be snapped together on site. The frame members shall be square cut and fixed securely to the frame by means of stainless steel screws driven into integral screw ports within the sections. All frame joints are sealed during construction against entry of water using Metal Technology's small gap sealant with glazing tape applied over the front face of each joint. Metal Technology recommends that only A2 or A4 austenitic stainless steel fixing screws are used in the assembly of their products.
Carefully designed fixing brackets have been developed for System 8 to allow a secure and simple fix so that all loads can be transferred back to the building’s main structural form with ease.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
- Anodised to BS1615 or BS3987 or BS EN 12373-1
- Powder organic coated to BS6496 or BS EN 12206-1
Metal Technology's powder coating is produced to Qualicoat standards. The System 8 curtain walling can accommodate a different colour/finish internally to that used externally.
Glazing
The system is externally glazed and can accommodate glazing units from 6mm to 36mm.
Thermal Performance
Metal Technology’s Curtain Walling Range, in conjunction with the correct glass specification, is designed to aid compliance with the latest thermal requirements of the current building regulations. The thermal isolator profile has been specifically designed to minimise heat transfer across the mullion and transom.
System 8 | U-Frame Values System 8 (32mm) |
Mullion | 2.51 w/m2k |
Transom | 2.47 w/m2k |
The following U-values for a System 8 screen are based on 5m (w) x 6m(h) curtain walling façade.
Achievable whole window U-value (32mm) | Centre pane U-value | |
1.0 W/m2K | 0.5 W/m2K | |
System 8 | 1.20 W/m2K | 0.72 W/m2K |
Metal Technology can provide tailored U-value calculations using their dedicated estimating software to calculate overall project average window U-values for their full range of systems.