If you are in the market for replacement aluminium windows and have been looking at the various aluminium window products available, you may have heard the term “Thermally Broken”.
Whilst not the most positive sounding of descriptions, the vast majority of aluminium windows are now thermally broken. Other terms for thermally broken include “thermally insulated” “thermal” “polyamide thermal break” “insulated profiles” and other descriptions.
Why do aluminium windows need to be thermally broken?
This early aluminium door profile is non thermally broken, visible by the one part aluminium profile
Aluminium as a metal conducts heat very well indeed. For windows and doors that are not thermally broken this would severely affect the performance of the window during the winter and the summer months. There will be double glazing salesmen that only sell pvc windows that will try to tell you that aluminium condensates and will feel cold to the touch internally. This was the case with early aluminium windows that were not thermally broken but no longer the case with any modern aluminium system available today.
The thermal break in aluminium is a barrier that breaks the aluminium to aluminium contact from the inside to the outside of the window. In other words, your modern aluminium window is aluminium outside, a thermal barrier in between and aluminium inside. It simply separates the aluminium.
What is used to create a thermally broken window?
Early aluminium windows used a liquid resin that hardened to form a thermal break. If you have an old thermally broken window and you look at the inside of the frame with the window open, you will see a glossy resin separating the aluminium profiles.
Modern thermal break technology today uses polyamide plastic strip separating the internal and external faces of the aluminium. This has resulted in window profile being manufactured in separate extrusions to create the finished profile unlike before when it was extruded as one.
Today, the aluminium external and internal profiles are extruded separately, “rolled” onto the thermal barrier of polyamide and this produces the finished aluminium profile.
Modern thermal break technology has also given the customer the advantage of dual colour.
On modern thermally broken windows there are now three parts. The outside aluminium, the polyamide thermal break and the inside aluminium.
Now that modern aluminium windows have their inside and outside faces produced separately this has given the huge advantage of dual colour. One profile can be painted in one colour, the inside profile in another and it can then be rolled onto the polyamide thermal barrier to create a dual colour window. This could not be possible with early resin thermally broken windows.
We are here to answer all your questions about aluminium windows and doors so please do not hesitate to contact us if you require further information or wish to be put in touch with excellent window companies supplying high quality and modern aluminium windows.
The post What are Thermally Broken Windows? appeared first on Aluminium Trade Supply.
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