the Building Envelope
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What is Thermally Broken Aluminium windows?
Aluminium is a very good conductor of heat and it provides very poor insulation against the winter weather and provides little protection from the summer sun.
Thermally broken aluminium windows and doors immediately solve this insulation problem by using a “thermal break” also known as a “thermal barrier”.
This is a piece of material that doesn’t conduct heat at all, used to separate two materials or structures that do conduct heat. It acts as a barrier between the two to prevent heat transferring between them. In the case of aluminium windows, its main benefit is to prevent heat transferring from the inner frame to the outer frame – and to prevent the cold moving in from the outer to the inner.
The thermal barrier conducts up to 1,000 times less heat than aluminium, so it provides a tremendous reduction in heat loss and increases thermal performance. It also has the side effect of making your windows more soundproof, by dampening vibrations between the outer and inner frame.
Aluminium frame sections is manufactured in two halves, designed to fit together perfectly in the final product.
The material used for the thermal break is a high strength polyamide that has very similar strength and expansion properties to aluminium.
The polyamide thermal break is mechanically joined to the frame sections to maintain the frame’s stiffness and rigidity – and the width of the break can now be much wider which means that the heat insulation and thermal performance is several times greater than before.
Each half of the frame can be painted separately and then easily joined either side of the thermal break, so dual colour options are much easier and more cost-effective.