Stone wool insulation is nature's own invention; harnessed for industrial use for more than 80 years. When the volcano erupts, the molten stone is fiberized by the wind on the slopes of the mountain. These thin fibres were the first form of stone wool.
PAROC Stonewool insulation is produced with similar principles; by melting and fiberizing volcanic stones; typically basalt, gabbro, anorthosite and dolomite at 1500°C. In the industrial production of stone wool insulation, we add a small amount of organic binder (2-4%) to stabilize the fibres. Air is trapped in tiny pores formed of stone wool fibres and creates a durable and non-combustible insulation with excellent thermal qualities. Immobile air trapped in the pores accounts for 95-99 percent of the insulation volume.