Insulation class fire rating non - combustible A - level and A2 - level difference
A1 and A2 difference: 1. Light rock wool board is A1; 2. Rock wool composite board is A2 level; so A2 refers to the A1 level and another material of the complex, grade lower than A1.
A1 level is absolutely non-flammable and no smoke produced by the A2 non-combustible but there is a certain smoke poison gsy inorganic rigid foam insulation board details contact by registered name hit my cell phone
Grade | decoration materials combustion performance A | non-combustion B1 | refractory B2 | combustible B3 | easy to burn
This is the building materials and products burning performance classification is now the use of the 06 standard, the combustion level of the sub-A1, A2, B, C and other corresponding to the previous foolish pit pits Qi bogey bogey 97 standard A-level (non-combustible) B1 (flame retardant) B2 (combustible) B3 (flammable) Now both standards are used
