Inside or outside opening terrace doors join room and yard or terrace spaces. Rigid profiles ensure stability of the structure, high quality fittings provide easy operation. Terrace doors meet tightness requirements applicable to windows and can be produced with uPVC filler instead of glass. Various widths of decorative partitionings are possible: inside glass unit or glued on the glass surface. As a standard terrace doors are produced with low aluminium threshold. Other benefits increasing tighness include fixation point to threshold, covering over top of the sash and upwards twisting handle. Contain recycled uPVC in the cores, reduce CO2 emissions and save energy.