Aluminium profiles are also characterised by the greatest stability among the materials used for windows. They are lightweight and durable, making them the best choice for the installation of large and heavy glazing. A typical frame can hold burglar-proof glass packages weighing as much as 50-60 kg/m2! In addition, aluminium is easily mouldable, allowing the creation of a variety of window shapes, such as rectangular, round or arched. Thanks to its high stability and strength, the profile can be relatively narrow, allowing for large glazings with almost no visible frame.
Cracks, burrs, peeling or corrosion are not allowed on the surface of the aluminium profile. No obvious scratches, craters or bruises are allowed. In the transportation of aluminium profiles, ensure that the protective film is intact, and the handling process should pay attention to the phenomenon of bruising.
According to the regulations, from 2021 onwards, the Uw value of a vertical window must not exceed 0.9 W/(m2*K). However, it is worth mentioning that each of the two basic elements that make up a window, namely the frame and the glazing, have a different thermal transmittance. Consequently, the thermal transmittance of the glazing Ug is lower than that of the profile Uf, which makes the glazing a warmer window element. Uw is, in turn, only the resultant of the two values we mentioned.