A plastering strip (2, 26, 68, 92) of plastics material, having attached thereto a net-like reinforcing material section (18, 64) made of glass grating, glass silk or plastics fabric or of glass grating, glass silk or plastics scrim, for being embedded in or under a plaster layer, in particular a plaster layer on a thermal insulation of a building wall, the plastering strip being designed as a plastering strip for placement at a transition between a first component of a building, namely a window or door frame, a window sill, a beam or a metal connection or a pilaster, and a second component of a building, namely a thermal insulation and/or a plaster layer, and further comprising: a fixing area; and a plastering area intended for being plastered into the plaster layer and/or for fixed connection to the thermal insulation; wherein the fixing area and the plastering area are designed as common extrusion part or as separate extrusion parts; and wherein the reinforcing material section (18, 64) to be embedded in the plaster is provided on the plastering area; characterized in that the reinforcing material section (18, 64) has a finish or coating of a not easily flammable or non-flammable material that falls at least into fire protection class B2 "normal flammability" according to DIN standard 4102-1, in particular into fire protection class B2 "normal flammability" according to DIN standard 4102-1 or into fire protection class B1 "not easily flammable" according to DIN standard 4102-1 or into fire protection class A2 "not flammable" according to DIN standard 4102-1; that the finish or coating envelops the entire net-like reinforcing material section (18, 64); that the glass grating or glass silk fabric or the glass grating or glass silk scrim falls into fire protection class A1 or A2 "not flammable" according to DIN standard 4102-1; or the plastics fabric or plastics scrim falls into fire protection class B1 "not easily flammable" or into fire protection class B2 "normal flammability" according to DIN standard 4102-1, so that the combination of the reinforcing material section and the finish or the coating of the reinforcing material section thus falls at least into fire protection class B2 "normal flammability" according to DIN standard 4102-1, in particular into fire protection class B2 "normal flammability" according to DIN standard 4102-1 or into fire protection class B1 "not easily flammable" according to DIN standard 4102-1 or into fire protection class A2 "not flammable" according to DIN standard 4102-1. a fixing area; and a plastering area intended for being plastered into the plaster layer and/or for fixed connection to the thermal insulation; wherein the fixing area and the plastering area are designed as common extrusion part or as separate extrusion parts; and wherein the reinforcing material section (18, 64) to be embedded in the plaster is provided on the plastering area; characterized in that the reinforcing material section (18, 64) has a finish or coating of a not easily flammable or non-flammable material that falls at least into fire protection class B2 "normal flammability" according to DIN standard 4102-1, in particular into fire protection class B2 "normal flammability" according to DIN standard 4102-1 or into fire protection class B1 "not easily flammable" according to DIN standard 4102-1 or into fire protection class A2 "not flammable" according to DIN standard 4102-1; that the finish or coating envelops the entire net-like reinforcing material section (18, 64); that the glass grating or glass silk fabric or the glass grating or glass silk scrim falls into fire protection class A1 or A2 "not flammable" according to DIN standard 4102-1; or the plastics fabric or plastics scrim falls into fire protection class B1 "not easily flammable" or into fire protection class B2 "normal flammability" according to DIN standard 4102-1, so that the combination of the reinforcing material section and the finish or the coating of the reinforcing material section thus falls at least into fire protection class B2 "normal flammability" according to DIN standard 4102-1, in particular into fire protection class B2 "normal flammability" according to DIN standard 4102-1 or into fire protection class B1 "not easily flammable" according to DIN standard 4102-1 or into fire protection class A2 "not flammable" according to DIN standard 4102-1.