Structural insulating joint of bottom door leaf and door sill connection consisting of a door leaf made up of a shaped dimensional, compound profile, the top part of which holds the glazed panel secured with a thermal insulating insert at the bottom and sealed on one side of the panel with an external pane gasket and with an internal pane gasket and a glazing strip on the other side, the bottom part of the shaped dimensional compound profile is divided into three enclosed chambers,,, characterized by the fact that: - the middle part of the profile spacers, contains trapezoid notches, for separate foundation of the trapezoid ends, of the thermal barrier and the outer part of the profile spacer has two rhombus-sectioned notches and for the separate foundation of the trapezoid protrusions, and of the upper sill gasket, equipped with a closed deformable chamber, the closed deformable chamber adjoins the bottom sill gasket of the sill separately connected to the mounting profile, - the mounting profile covered with insulating foil, the profile trapezoid protrusions of which, are placed in the T-shaped sockets, of the mounting profile - the mounting profile is equipped in the lower part with a T-sectioned socket for the anchor mounted separately in the base, - the sill is divided into shaped chambers,, while a chamber equipped with trapezoid sockets, is a basis for the trapezoid protrusions, of the spacers, between which a thermal barrier has been placed, - in a chamber of the sill located over another chamber a cover with a corrugated internal surface is separately founded and equipped with a groove for the ending of the upper chamber, - in the sockets,, of the sill protrusions,, of the mounting profile, with a series of internal closed chambers,,,, separated by thin walls, - in a chamber there is a reinforcing square-section profile and the pin of the mounting bolt. - the middle part of the profile spacers, contains trapezoid notches, for separate foundation of the trapezoid ends, of the thermal barrier and the outer part of the profile spacer has two rhombus-sectioned notches and for the separate foundation of the trapezoid protrusions, and of the upper sill gasket, equipped with a closed deformable chamber, the closed deformable chamber adjoins the bottom sill gasket of the sill separately connected to the mounting profile, - the mounting profile covered with insulating foil, the profile trapezoid protrusions of which, are placed in the T-shaped sockets, of the mounting profile - the mounting profile is equipped in the lower part with a T-sectioned socket for the anchor mounted separately in the base, - the sill is divided into shaped chambers,, while a chamber equipped with trapezoid sockets, is a basis for the trapezoid protrusions, of the spacers, between which a thermal barrier has been placed, - in a chamber of the sill located over another chamber a cover with a corrugated internal surface is separately founded and equipped with a groove for the ending of the upper chamber, - in the sockets,, of the sill protrusions,, of the mounting profile, with a series of internal closed chambers,,,, separated by thin walls, - in a chamber there is a reinforcing square-section profile and the pin of the mounting bolt.