Insulating strip for door, window or façade elements, composite profile for door, window or façade elements, and method for finishing manufacturing of a roll-in head of an insulating strip for door, window or façade elements

An insulating strip for connecting profiles of a composite profile for doors, windows or façade elements, at least one of the profiles being made of a metal material having a first tensile strength and having at least one roll-in groove for a roll-in connection with the insulating strip, comprising:

• a strip body made of a thermoplastic insulating material and extending in a longitudinal direction (z),
• a roll-in head at a longitudinal edge of the strip body, the roll-in head having a cross-sectional shape in a plane (x-y) perpendicular to the longitudinal direction (z) adapted to be inserted into the at least one roll-in groove, a first thickness (a2) of the cross-sectional shape of the roll-in head towards a distal outer edge of the roll-in head that faces the at least one roll-in groove being larger than a second thickness (a1) of the cross-sectional shape of the roll-in head at a transition from the roll-in head to the strip body, and
• a sheet covering at least a portion of a surface of the roll-in head and comprising surface variations,
• wherein:
• the sheet or at least partially comprises one or more portions made of a metal material, and
• the metal material of the sheet has a melting temperature that is at least 50 K higher than a melting temperature of the thermoplastic insulating material of the strip body.