Device for attaching insulation materials

A device for attaching insulation material (13) to a base material (B), such as a structural member, comprising an axially extending hollow receptacle (1) having a leading end to be fastened to a surface of the base material and a trailing end to be spaced outwardly from the base material, and a pressure component (4) having an axially extending shaft (3) with an axial length (L1) and a central throughbore (7), said shaft (3) having a leading end to be inserted into the trailing end of said receptacle and a trailing end with a large area head (2) projecting laterally outwardly from said shaft (3), said receptacle (1) having an inside surface and said shaft (3) having an outside surface each having a profiled surface (5, 6) arranged to interconnect in a positively locked manner, said shaft (3) having at least one axially extending slot therethrough extending from the leading end thereof for at least a part of the axial length (L1) thereof, and an axially elongated stud-shaped expanding element (8) drivable into said throughbore (7) of the said shaft (3) from the trailing end towards the leading end.