Doors and windows made of aluminium, steel or pvc, thermally insulated with a thermal bridge made of rigid polyamide. The profiles carry the loads and function with ease and efficiency. The ironmongery and the accessories are mode of aluminium or galvanized steel. The openings of the interior windows can be turn, tilt-turn, revolving, pivoting, sliding and top-hung opening for the exterior ones. The doors can be open at interior or exterior with one or two panes and they can be turning, half-turning, revolving, sliding or antipanic.