Rock wool sandwich panel cladding is a special building material with three layers. It got two outer layers mostly from metal, and inside layer from rock wool which is kind of insulation. This polyurethane composite panels make it strong and really good to keep building warm in winter or cool when summer come. GLOSTAR company specialize in producing these panels. They using high quality stuff so their product reliable and work well for different kind buildings. Whether homes, school or even factories, rock wool sandwich panels can give good protection and also insulation.