The reaction to fire tests classifies the material in 5 categories from A0 to A4 (see table below). Also note that the test methods used are similar to those used in France. As for Spain, the calculation mode according to the NF P 92-501 test of the M value differs from the French methodology. The test are comparable but results exploitation are quite different.
Belgium classification Class | Test method | AO | ISO 1182 | A1 | NF P 92-501 / NF P 92-504 BS 476-7 | A2 | NF P 92-501 / NF P 92-504 BS 476-7 | A3 | NF P 92-501 / NF P 92-504 BS 476-7 | A4 | Exceed class A3
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