What is the fire rating of composite panels of different materials?

Rockwool sandwich panels are Class A non-combustible materials.
The polyurethane (sealing) rock wool board has a fire rating of B1.
EPS is B3 grade flammable (excluding special flame retardant benzene board), which is the most flammable among the three composite board materials.

composite panels


Post time: Aug-02-2019
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