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 | E2400 |
Size Limitation
| Door Sash | Door Sash Width | Door Sash Height |
| Single Door | 1300mm max | 3000mm max |
| 650mm min | 1900mm min | |
| Double Door | *1300mm max | 3000mm max |
| *650mm min | 1900mm min |
*Width is based on the individual sash width. Maximum door weight with 4 hinges 130 Kg.
Size limitations will vary subject to ironmongery requirements.
Security
This system has passed PAS 24 "Enhanced Security Performance Requirements for Door Assemblies" as generally accepted on Secure by Design projects.
BREEAM Sustainability Rating
A+ Rating
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:
- Anodised to BS EN 12373-1 or BS 3987
- Powder organic coated to BS EN 12206-1
Metal Technology's powder coating is produced to Qualicoat standards.
Glazing
This system offers internally glazed sashes and can accommodate glazing units from 24mm to 44mm 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:
- Anodised to BS EN 12373-1 or BS 3987
- Powder organic coated to BS EN 12206-1
Metal Technology's powder coating is produced to Qualicoat standards.
Glazing
This system offers internally glazed sashes and can accommodate glazing units from 24mm to 44mm units.
Thermal Performance
Metal Technology’s 
range, in conjunction with the correct glass specification, is designed to aid compliance with the latest thermal requirements of the current building regulations. The polyamide thermal break profiles have been specifically designed to minimise heat transfer across the door profiles.
Thermal performance is further improved through the introduction of specially designed foam profiles. These reduce radiation heat loss across the air cavities within the door profiles to provide additional thermal enhancement.
U-Frame Values
| U-frame Values | ||
| 5-20D | 5-20D Hi+ | |
| Outer frame and open out sash | 2.55 W/m2K | 2.40 W/m2K |
| Outer frame and open in sash | 2.53 W/m2K | 2.38 W/m2K |
The following table, based on a standard single door designed to comply with current DDA requirements (1100mm x 2100mm sash size) and using warm edge spacers, demonstrates how such improved U-frame values then contribute to improving the overall performance of a complete door.
| Achievable whole door U-value | Centre pane U-value | |
| 1.0 W/m2K | 0.5 W/m2K | |
| 5-20D Hi+ glazed-in sash | 1.59 W/m2K | 1.24 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.
