Sandwich panels consist of two outer layers of formed metal (or other materials) with an insulating polymer core that is foamed and cured directly between them. They are lightweight, highly efficient, and easy to install. The core material features a closed-cell molecular structure, which effectively prevents the condensation of water vapor. As a common building material, sandwich panels offer excellent flame retardancy and sound insulation, while being both eco-friendly and highly efficient.
Current types of sandwich panels include: expanded polystyrene (EPS) sandwich panels (the most widely used variety on the market); extruded polystyrene (XPS) sandwich panels; rigid polyurethane (PU) sandwich panels; polyisocyanurate (PIR) sandwich panels; phenolic foam (PF) sandwich panels; and rock wool (RW) sandwich panels.