Composite foam cement board fire board grade and fire resistance limit?
Composite foam cement board fire board fire rating:
Fire rating Class A: Class A is a noncombustible material, Class A fire resistance rating is very high, and the price is quite expensive.
Should belong to the A1 level, the fire limit according to the thickness will be different, should be in an hour or so.
Refractory grade B1: B1 is not flammable material, it is flammable, but not easy to burn, fire and fire in the fire to play a certain degree of fire resistance. This type of sheet is generally used in the low-end public places more.
ire rating B: B-class refractory grade is a flame retardant material, the general high-end public places are used in the use of this material decoration.
