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 | 1250mm max | 3000mm max |
| 650mm min | 1900mm min | |
| Double Door | *1250mm 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
System 5-35D Hi / Hi+ has passed PAS 24 "Enhanced Security Performance Requirements for door Assemblies" as generally accepted on Secure by Design projects. To conform, the door must be in accordance with the samples tested, with ironmongery options as detailed in section 3 of the technical manual.
In order to comply with PAS 24, doorsets should be glazed in accordance with the methods in BS 6262 and BS 8000-7. The units should also be sealed conforming to BS EN 1279 and incorporating glass conforming to BS EN 356 Class P1A minimum.
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
Outer frame and door sash members are mitre cut at 45°, corners are reinforced with extruded aluminium crimping cleats and corner braces, and 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 cleat joints. All frame joints are sealed during construction against entry of water using a suitable sealant. Extruded weatherstrips and glazing gaskets are provided to resist the ingress of water. 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 range of finishes:
- Anodised to BS EN ISO 7599 or BS 3987
- Powder organic coated to BS EN 12206-1
Where a different colour is required internally and externally, Metal Technology can accommodate this.
Glazing
Door sashes are internally beaded and can accommodate glazing units from 28mm to 65mm. Integral fanlights and sidelights may be internally or externally beaded and can accommodate glazing units from 28mm to 55mm. Larger fanlights and sidelights can be achieved by coupling to alternative systems. Glass is set against co-extruded gaskets externally which are fitted into gasket grooves in the frame upstand. Clip in beads are then fitted to the inside of the frame and held secure by means of colour coded wedge gaskets internally. For glass support, purpose made setting/location blocks are provided to locate into the sections. Where open out doors and fixed lights are required, liner bars, to give internal glazing to fixed lights, should be considered.
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
Outer frame and door sash members are mitre cut at 45°, corners are reinforced with extruded aluminium crimping cleats and corner braces, and 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 cleat joints. All frame joints are sealed during construction against entry of water using a suitable sealant. Extruded weatherstrips and glazing gaskets are provided to resist the ingress of water. 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 range of finishes:
- Anodised to BS EN ISO 7599 or BS 3987
- Powder organic coated to BS EN 12206-1
Where a different colour is required internally and externally, Metal Technology can accommodate this.
Glazing
Door sashes are internally beaded and can accommodate glazing units from 28mm to 65mm. Integral fanlights and sidelights may be internally or externally beaded and can accommodate glazing units from 28mm to 55mm. Larger fanlights and sidelights can be achieved by coupling to alternative systems. Glass is set against co-extruded gaskets externally which are fitted into gasket grooves in the frame upstand. Clip in beads are then fitted to the inside of the frame and held secure by means of colour coded wedge gaskets internally. For glass support, purpose made setting/location blocks are provided to locate into the sections. Where open out doors and fixed lights are required, liner bars, to give internal glazing to fixed lights, should be considered.
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 extended polyamide thermal break profiles, incorporating integral cavities, have been specifically designed to minimise heat transfer across the door profiles. This innovative and advanced thermal break technology provides the basis of the 5-35D Hi system.
The 5-35D Hi+ system further boosts thermal performance through the introduction of foam profiles. These reduce radiation heat loss across the air cavities within the door system to provide additional thermal enhancement.
The 5-35D Hi / Hi+ door systems offer significantly improved U-frame values over more traditional thermally broken aluminium door systems.
U-Frame Values
| U-frame Values | ||
| 5-35D Hi | 5-35D Hi+ | |
| Outer frame and open out sash | 1.97 W/m2K | 1.06 W/m2K |
| Outer frame and open in sash | 1.86 W/m2K | 1.05 W/m2K |
The following table, based on standard fully glazed single/double door configurations and warm edge spacers, demonstrates how such improved U-frame values then contribute to improving the overall thermal performance of a complete door.
| Achievable whole door U-value | Centre pane U-value | |
| 1.0 W/m2K | 0.5 W/m2K | |
| 5-35D Hi open out single door | 1.43 W/m2K | 1.03 W/m2K |
| 5-35D Hi open in single door | 1.39 W/m2K | 1.02 W/m2K |
| 5-35D Hi open out double door | 1.46 W/m2K | 1.06 W/m2K |
| 5-35D Hi open in double door | 1.42 W/m2K | 1.04 W/m2K |
| 5-35D Hi+ open out single door | 1.16 W/m2K | 0.78 W/m2K |
| 5-35D Hi+ open in single door | 1.14 W/m2K | 0.78 W/m2K |
| 5-35D Hi+ open out double door | 1.18 W/m2K | 0.81 W/m2K |
| 5-35D Hi+ open in double door | 1.16 W/m2K | 0.81 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.
Certified Passive House Component
Metal Technology’s 5-35D Hi+ System has been assessed by the Passive House Institute for cool, temperate climate zones, and met all component criteria necessary to achieve certification. The door U-values were calculated for the test door size of 1.1m x 2.2m with a 0.5W/m²K insulated glass unit. When higher thermally performing insulated glass units are used the door U-values should also improve.
