Rockwool now is a widely used thermal insulation building material (like UET's U-ROCKPAN series). It is made from basalt rock and slag. Basalt is a volcanic rock.Slag is a waste material recycled by steel mills.

Workers melt these materials together. The raw materials are heated to a high temperature and, once molten, spun into fibers. The fibers look like wool. The fibers are pressed into thick blanket, batts or board. These are rockwool insulation.
Rockwool has many good uses. It traps air very well. Trapped air stops heat from moving. Rockwool is a good thermal insulation solution in many applications including walls, floors, roofs, attics. Rockwool has proven noise-reduction and sound-absorption properties, is durable and is typically non-combustible. 
U-ROCKPAN stone wool comes in a range of thicknesses from 25mm to 200mm, including but not limited to 50mm, 75mm 100mm, 140mm and 150mm. Every application is different and the thickness needed depends on the thermal, acoustic and fire resistance requirements. 
The best mineral wool insulation solution for your project depends on your specific application. To help you decide on the best U-ROCKPAN product for your project, you can click here to contact sale managers near you.
In summary, Rockwool is a useful material. It is made from natural and recycled rocks. It saves energy, reduces noise, and protects against fire.