Themally insulated lift and slide system intended to accomlish elements of external constructions. The structure allows to make stable constructions of large size, with even 6 sashes and of very large sash weight. The structural depth of profiles equals 67mm for sashes,160 mm for double track frames and 247 mm for triple track frames. The system allows to apply fillings up to 50mm thick. It's advantege is high resistance to weather conditions.