The thermal break is a continuous barrier between the inside and outside window frames that prevent conductive thermal energy loss (see the image above). The barrier securely bonds the interior and exterior metal frames of the window sash. A thermal break, in construction, is an insulating material or barrier strategically placed within building components to interrupt the flow of thermal energy. A thermal break acts as a buffer zone between two conductive materials, preventing the transfer of heat from one side to the other. The purpose of thermal break materials and systems (thermal breaks) is to reduce the impact of thermal bridging by preventing conductive heat flow through the thermal envelope. Thermal breaks keep the heat in and push the dew point out. They break the bridge. doC56.

what is a thermal break