Performance Overview
Weather Performance
Independently Weather Performance Tested to BS 6375-1.
| Air permeability BS 6375 | Class 4 |
| Watertightness BS 6375 | E900 |
| Wind Resistance BS 6375 | AE1800 |
Information above is based on 2 Pane Lift and Slide / 1 Pane Fixed door
Size Limitation
| Door Type | Door Sash Height | Door Sash Width | Max Weight |
| Lift and Slide Door | 2800mm max | 2100mm max | 200Kg |
| 950mm min | 800mm min |
Window Energy Rating
B Rating
Materials
Aluminium profiles are extruded from aluminium alloy 6060T6, T5, or T4 complying with the recommendations of BSEN 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 thermally breaking.
Construction
Frame members are mitre cut at 45°, corners are reinforced with corner braces and mechanical cleats. All frame joints are sealed during construction against entry of water.
Finishes
The range of sections can be provided in either of the following range of finishes:
- Anodised to BS EN 12373-1 or BS 3987
- Powder organic coated to BS 6496 or BS EN 12206-1
The system 25 Hi / Hi+ Lift and Slide Door can accommodate a different colour/finish internally to that used externally.
Glazing
The system can accommodate 28mm to 32.8mm glazing units. Glass is set against a captive gasket in the sash frame with a co-extruded wedge fitted internally. Special bridging setting / location blocks are provided to fit into the sections.
Materials
Aluminium profiles are extruded from aluminium alloy 6060T6, T5, or T4 complying with the recommendations of BSEN 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 thermally breaking.
Construction
Frame members are mitre cut at 45°, corners are reinforced with corner braces and mechanical cleats. All frame joints are sealed during construction against entry of water.
Finishes
The range of sections can be provided in either of the following range of finishes:
- Anodised to BS EN 12373-1 or BS 3987
- Powder organic coated to BS 6496 or BS EN 12206-1
The system 25 Hi / Hi+ Lift and Slide Door can accommodate a different colour/finish internally to that used externally.
Glazing
The system can accommodate 28mm to 32.8mm glazing units. Glass is set against a captive gasket in the sash frame with a co-extruded wedge fitted internally. Special bridging setting / location blocks are provided to fit into the sections.
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. This innovative and advanced thermal break technology provides the basis of the 25 Hi / Hi+ system.
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.
The 25 Hi / Hi+ system offers significantly improved U-frame values over more traditional thermally broken aluminium door systems.
| U-Frame Values | ||
| 25 Hi | 25 Hi+ | |
| Triple Track Lift and Slide Door Perimeter | 3.04W/m2K | 2.48W/m2K |
| Triple Track Lift and Slide Door Interlock | 3.68W/m2K | 2.67W/m2K |
The following table, based on a triple track door (3000mm x 2180mm) 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 Window U-Values | Centre Pane U-Values |
| 1.0W/m2K | |
| 25 Hi Lift and Slide Door | 1.65W/m2K |
| 25 Hi+ Lift and Slide Door | 1.48W/m2K |
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.
