Aluminium section member assembly with a thermal bridge gap for window and door frames

An aluminum section member assembly with a thermal bridge gap, said aluminum section member assembly comprising first and second frame members, each frame member including an outer section member and an inner section member, said inner section member coupled to said outer section member by at least two strips made of a thermally insulating synthetic material and defining, with portions of said outer section member and said inner section member, an inner chamber into which is inserted a thermally insulating material filling body;

• wherein said thermally insulating synthetic material filling body comprises an extruded section member made of a closed cell foamed plastic material, said filling body being extruded separately from said section members with a configuration substantially like the configuration of said inner chamber, said configuration being adapted to be fitted into said inner chamber after said outer section member and said inner section member have been assembled together to form said section member assembly, and wherein at least one of said strips is provided, on an outer side of said first frame member thereof, with a tubular lug of trapezoidal closed cross section, defining an abutment surface, at least another of said strips being provided, on an outer side of said second frame member thereof, with a U-shaped extension that pressure engages another portion of a three-tube resilient gasket.