Abstract: An elongate edging strip for trimming the edges of building panels such as tiles comprises an extruded profile made from a vinylaromatic homopolymer or copolymer. The profile comprises a leg section (1), intended to locate under the building panel and an upstanding section (2), both of solid material. The upstanding section (2) is turned inwards to form a groove containing a fillet (7) of foamed material. In an alternative aspect, a method of making an elongate edging strip is described, said method comprising extruding a profile comprising a base section and two spaced upstanding sections, forming a longitudinal line of weakness in the base section, and breaking the profile apart at said line of weakness to form two edging strips.