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From lava to stone wool

Creating Rockwool - wholly natural material spun into wool from rock

Rockwool is a natural material formed from one of the earth's most abundant materials - volcanic diabase rock over 200 million years old. The rocks are graded and crushed to a suitable size, mixed with coke and slags, then melted in a furnace at a temperature of 1500 °C.

The melt is directed onto a series of rotating wheels where it is spun into wool. From the spinning machine the wool enters a chamber where small quantities of resin binder and mineral oil are added to lock the strands together and make them water repellent.

The wool is formed into a mat which is then carried through ovens where it is cured and compressed. Then it's cut into various shapes and sizes which can be combined with other facing materials creating standard and specialist products for a wide range of applications.



Density of the wool, orientation of the fibres and the segment of the resin binder define mechanical properties of the final product and by this also the area of its application. Insulation using the stone wool does not only provide for thermal, acoustic and fire protection of an object, but also, due to these insulation properties, contributes to significant reduction of the energy consumed for heating.

Production of stone wool is an ecologically acceptable manner of producing insulation materials, as one cubic meter of raw material results in a hundred times larger volume of produced insulation material, with the minimal spending of energy resources. An average Rockwool product for thermal insulation of the residential buildings in the “shelf life” of such a building enables 1700 times larger energy savings than the amount of energy used for its production.