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Moreover, extruded aluminum hardly produces sparks irrespective of the friction it is subjected to.

The drawback to this window is that it’s restricted by size. Most side-hung types of aluminium windows are only around 600mm wide, with a handful of products slightly wider. They’re also frequently restricted in height.

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.