Sandwich panels are lightweight, durable building materials made of three layers:

Outer layers: Usually made of metal sheets (like steel or aluminum)

Core: An insulating material such as polyurethane (PU), polystyrene (EPS), or mineral wool

They are widely used in roofs, walls, and cold rooms due to their excellent thermal insulation, fire resistance, and easy installation. Ideal for warehouses, factories, and commercial buildings.