Aluminium doors, windows and curtain walls are considered to be the technological and architectural elements with designed functions to interact between two inside and outside environments and are supposed to guarantee general comfort within the home. The main functions between others are mechanical properties, air, water and wind resistance, thermal insulation, acoustic insulation, light and shade, ventilation and safety.Windows, doors and curtain walls are available in wood, steel, PVC, etc., but those made with aluminium have all the advantages of the unique characteristics of such metal alloy. Aluminium is however also an excellent thermal conductor, and allows temperature migration from outside to inside and vice-versa, acting as a “thermal bridge”. Such a disadvantage of aluminium can be neutralized by using thermal break systems.Thermal break, an equally important component in any window and door system, refers to the reinforced polyamide bar between the inside and outside aluminium profiles, creating an insulated barrier within the window frame. In simple words, it acts as a circuit breaker – cutting off the inside with the outside. The frame can greatly affect the actual energy efficiency of any window and door, including that of double glazed systems.Thermally broken window frames have been available for a number of years, but for some reason their uptake has not been as rapid as might be expected from the promotion given to them. In the exterior wall of a house, the most thermally inefficient portion is the windows. We tolerate this disadvantage because the inhabitants like to be able to look out, and also the glass allows radiant solar energy to enter the building so as to give a positive thermal gain.
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