A skirting strip (2, 42, 52) for arrangement at a building transition between a lower wall end and an adjoining floor area, comprising a base body having in particular a square cross-section, e.g. a substantially rectangular or substantially parallelogram-shaped cross-section, with a front side, a rear side, a top side and a bottom side, or a base body having in particular a triangular cross-section with a front side, a rear side and a bottom side; a lower projecting lip on the bottom side of the base body, in particular at the front end of the bottom side of the base body; and/ or an upper projecting lip on the top side of the base body, in particular at the front or rear end of the top side of the base body; wherein the front side of the base body and at least one of the front side of the lower projecting lip and the front side of the upper projecting lip form a visible area which, in the position of the skirting strip (2, 42, 52) arranged at the transition between the lower wall end and the adjoining floor area, is intended to be facing away from the lower wall end and away from the floor area; wherein the rear side of the base body and at least one of the rear side of the lower projecting lip and the rear side of the upper projecting lip form a non-visible area which, in the position of the skirting strip (2, 42, 52) arranged at the transition between the lower wall end and the adjoining floor area, is intended to be facing toward the lower wall end and toward the floor area; wherein on the rear side of the lower projecting lip and/or on the rear side of the upper projecting lip a layer (30, 32; 34, 36, 32; 54), in particular a reinforcement layer or a support layer, is applied at least in portions thereof, which comprises a more flexible material than the base material of the lower projecting lip and/or the upper projecting lip, in order to avoid tearing or breaking of the lower projecting lip and/or the upper projecting lip upon deformation of the lower projecting lip and/or the upper projecting lip, characterized in that the base body of the skirting strip (2, 42, 52) as well as all projecting lips (18, 20) present consist of the same base material. a base body having in particular a square cross-section, e.g. a substantially rectangular or substantially parallelogram-shaped cross-section, with a front side, a rear side, a top side and a bottom side, or a base body having in particular a triangular cross-section with a front side, a rear side and a bottom side; a lower projecting lip on the bottom side of the base body, in particular at the front end of the bottom side of the base body; and/ or an upper projecting lip on the top side of the base body, in particular at the front or rear end of the top side of the base body; wherein the front side of the base body and at least one of the front side of the lower projecting lip and the front side of the upper projecting lip form a visible area which, in the position of the skirting strip (2, 42, 52) arranged at the transition between the lower wall end and the adjoining floor area, is intended to be facing away from the lower wall end and away from the floor area; wherein the rear side of the base body and at least one of the rear side of the lower projecting lip and the rear side of the upper projecting lip form a non-visible area which, in the position of the skirting strip (2, 42, 52) arranged at the transition between the lower wall end and the adjoining floor area, is intended to be facing toward the lower wall end and toward the floor area; wherein on the rear side of the lower projecting lip and/or on the rear side of the upper projecting lip a layer (30, 32; 34, 36, 32; 54), in particular a reinforcement layer or a support layer, is applied at least in portions thereof, which comprises a more flexible material than the base material of the lower projecting lip and/or the upper projecting lip, in order to avoid tearing or breaking of the lower projecting lip and/or the upper projecting lip upon deformation of the lower projecting lip and/or the upper projecting lip, characterized in that the base body of the skirting strip (2, 42, 52) as well as all projecting lips (18, 20) present consist of the same base material.