The three fire levels are different.
The rock wool sandwich panel is Class A non-combustible material.
The EPS is B3 grade flammable (excluding special flame retardant benzene board).
The polyurethane (edge sealing) rock wool board is B1 grade.
- Aug 02, 2019-
The three fire levels are different.
The rock wool sandwich panel is Class A non-combustible material.
The EPS is B3 grade flammable (excluding special flame retardant benzene board).
The polyurethane (edge sealing) rock wool board is B1 grade.