... ,light weight 2.High wave for good draining 3.Low cost and economical Rock wool roofing sandwich panels ... Rockwool density: 110-150kg/m36.Character:1). Fireproof, heat insulation, water resistant, noise-absorbing, cheap in price.2). ... -0.6mm Rock Wool board: 50mm 75mm 100mm 150mm 200mmThe rock wool density110kg/m3Conventional colorOcean blue, whitegrey, etcCharacterFireproof, heat insulation, green and ...