Thermal Information
We offer the latest and most effective thermal features on all of our bifold doors to help our customers enjoy lower fuel bills and reduce their environmental impact.
A polyamide thermal-break barrier is intrinsic to our aluminium door profiles which assists us in achieving a U value of 1.9W/m2K on our standard products.
To create this thermal barrier, polyamide is poured into a channel in the aluminium extrusion designed specifically for that purpose. The back of the channel is then cut away to create a thermal barrier between what is now two separate sections.
In addition, the doors are built using:
- Machine manufacture to prevent human error which can prevent a perfect fit
- Weather stripping - a combination of TPR bulb and flipper seals and polyurethane foam enclosed in a polythene sheet
- High rated thermal glass which can be customised for additional protection
- Accurate surveying and first class installation where applicable
Part L Thermal Compliance
Our doors meet part L government standards for the conservation of fuel and power in homes, helping to build a more sustainable environment. For further information see http://www.bre.co.uk.
Test Performance
Our 3 panel door was tested to BS6375 Part 1:2004 and achieved the highest weathering classification as follows:
| Test | Open In | Open Out |
| Air Permeability | Class 4 600 pascals |
Class 4 600 pascals |
| Water tightness | Class 3A 150 pa |
Class 7A 600 pa |
| Wind resistance | Class 4 1600 pa |
Class 4 1600 pa |
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