Is the fire rating of the composite panels of the three different materials the same?

- Aug 02, 2019-

The three fire levels are different.

The rock wool sandwich panel is Class A non-combustible material.

rockwool sandwich pannel

The EPS is B3 grade flammable (excluding special flame retardant benzene board).

EPS sandwich pannel1

The polyurethane (edge sealing) rock wool board is B1 grade.

PU sandwich pannel