60 and 75 mm thicknesses :
Stone wool insulation double-density board.
Thermal conductivity (ACERMI) = 0,035 W/m.K
Two layers density : average from 75 to 72 kg/m3
85+ mm thicknesses :
Stone wool insulation double-density board.
Thermal conductivity (ACERMI) = 0,034 W/m.K
Two layers density : average from 72 to 66 kg/m3