Aluminium doors are characterized by a wide product range in both the hot and cold versions. It is a system of very good parameters that enable meeting varying clients’ requirements. They possess excellent thermal- and sound insulation properties. It is a door system of high insulation qualities. The construction depth of the sash’s and frame profilers give the effect of flush-fitting profile surfaces and enable creating slim and durable structures. Expansion joint profiles for door sashes are also available and they enable avoiding the thermal deformation of large size door sashes.