Thermal break is a process that allows the exterior face to be insulated from the interior face of the aluminum profile by introducing an insulating bar (most often in polyamide, but also in PVC or polyurethane) between both profiles.

This insulation prevents reciprocal temperature exchange. It acts as a barrier against the cold, retains the heat or freshness captured, limits water runoff and condensation.

The use of aluminum systems with thermal breaks in buildings allows significant energy savings, as well as reinforced sound insulation with the use of double and triple glazing.