A plastering strip (2, 26, 68, 92) of plastics material, having attached thereto a net-like reinforcing material section (18, 64, 92, 114) 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 reinforcing material section (18, 64, 92, 114) having a finish or a coating of a plastics base material, characterised in that the net-like reinforcing material section (18, 64, 92, 113) is designed as a glass grating or glass silk fabric or glass grating or glass silk scrim that falls into fire protection class A1 or A2 "not flammable" according to DIN standard 4102-1; or the net-like reinforcing material section (18, 64, 92, 113) is designed as a plastics fabric or plastics scrim that falls into fire protection class B1 "not easily flammable" or into fire protection class B2 "normal flammability" according to DIN standard 4102-1; wherein the plastics base material of the finish or coating of the reinforcing material section (18, 64, 92, 114) falls into fire protection class B3 "easily flammable" according to DIN standard 1402-1, and the plastics base material is provided with a flame retardant so that the combination of plastics base material and flame retardant 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; wherein the combination of the reinforcing material section (18, 64, 92, 114) and the finish or coating of the reinforcing material section 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; wherein the plastics base material of the finish or coating, which falls into fire protection class B3 "easily flammable" according to DIN standard 1402-1, comprises in particular one of the materials PE (polyethylene), PET (polyethylene terephthalate) or PS (polystyrene); wherein the flame retardant of the finish or the coating is designed as a halogenated flame retardant, a nitrogen-based flame retardant, an organophosphorus flame retardant, or an inorganic flame retardant; and/or is designed as an additive flame retardant which is introduced as an additive into the base material of the reinforcing material section (92; 84; 18, 64), in particular into the polyethylene base material of reinforcing material section (92; 84; 18, 64). the reinforcing material section (18, 64, 92, 114) having a finish or a coating of a plastics base material, characterised in that the net-like reinforcing material section (18, 64, 92, 113) is designed as a glass grating or glass silk fabric or glass grating or glass silk scrim that falls into fire protection class A1 or A2 "not flammable" according to DIN standard 4102-1; or the net-like reinforcing material section (18, 64, 92, 113) is designed as a plastics fabric or plastics scrim that falls into fire protection class B1 "not easily flammable" or into fire protection class B2 "normal flammability" according to DIN standard 4102-1; wherein the plastics base material of the finish or coating of the reinforcing material section (18, 64, 92, 114) falls into fire protection class B3 "easily flammable" according to DIN standard 1402-1, and the plastics base material is provided with a flame retardant so that the combination of plastics base material and flame retardant 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; wherein the combination of the reinforcing material section (18, 64, 92, 114) and the finish or coating of the reinforcing material section 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; wherein the plastics base material of the finish or coating, which falls into fire protection class B3 "easily flammable" according to DIN standard 1402-1, comprises in particular one of the materials PE (polyethylene), PET (polyethylene terephthalate) or PS (polystyrene); wherein the flame retardant of the finish or the coating is designed as a halogenated flame retardant, a nitrogen-based flame retardant, an organophosphorus flame retardant, or an inorganic flame retardant; and/or is designed as an additive flame retardant which is introduced as an additive into the base material of the reinforcing material section (92; 84; 18, 64), in particular into the polyethylene base material of reinforcing material section (92; 84; 18, 64).