Rockwool insulation is a rock-based mineral fiber insulation comprised of Basalt rock and Recycled Slag. Basalt is a volcanic rock (abundant in the earth), and slag is a by-product of the steel and copper industry. The minerals are melted and spun into fibers.

Rock or Stone wool Insulation, is essentially open cell insulation materials which work very well at absorbing acoustic and thermal energies. Invariably used in cavities such as stud walls, this rather rigid material comes in different thicknesses and densities and is used in both households and commercial projects as it is quite affordable.