Terrace doors, join room and yard or terrace spaces. Rigid profiles ensure stability of the structure and easy operation. Terrace doors meet tightness requirements applicable to windows and can be produced with many options of design: with uPVC filler instead of glass, can be decorated with wide choice of decorative partitionings. As a standard terrace doors are produced with low aluminium threshold. Other benefits increasing tighness include fixation point to treshold, covering over top of the sash and additonal function in handle.