Frame Performance
What is a thermal break in aluminium windows?
By Sheng Xu · 26 July 2026
AI-generated illustrative image. Not a product test, certification record or project evidence.
A thermal break is an insulating material, typically a low-conductivity polymer, strategically placed between the interior and exterior sections of an aluminium window frame. Its primary function is to minimise heat and cold transfer through the frame, as aluminium is a strong thermal conductor. This significantly enhances the window's overall thermal performance, crucial for improving energy efficiency and comfort in Australian buildings.
Why it matters
Window and door decisions are rarely about one metric in isolation. Standards, glazing, frame selection, installation conditions and project documentation all need to work together before a system is selected for a real site.