What is a thermal break aluminium door?

A thermal-break aluminium door separates the interior and exterior aluminium profiles with a 24 mm polyamide strip filled with 25% glass fibre (PA66GF25). Because plastic conducts heat roughly 100× less than aluminium, this bridge drops the frame's U-value from about 5.5 W/m²·K (standard aluminium) to roughly 1.8-2.5 W/m²·K.

All our aluminium doors — FjordNarrow, AuroraVista, VinterMeridian, SagaGlass, LundPane, BalticDuo, TundraBlade, BessaLoft, CarpathBrise — use 6063-T5 alloy with 1.4-2.0 mm wall thickness and the PA66GF25 24 mm thermal break. Combined with 5+12A+5 double insulating glass, the whole door achieves ≥30 dB sound insulation and meets passive-house-level insulation for most residential entrances.