Write a paragraph about the material composition of rock wool sandwich panels in 60 words

Rock wool sandwich panels consist of three layers: an inner and outer layer made of metal, and a core layer made of rock wool insulation. Rock wool is a lightweight and durable material made from natural volcanic rock. It is a non-combustible and fire-resistant material, making it a popular choice for insulation in buildings. The metal layers provide structural support and weather resistance, while the rock wool core layer provides sound and thermal insulation. The combination of these materials makes rock wool sandwich panels an excellent choice for building construction