Sandwich panels are used for walls and roofs in prefabricated buildings. These panels comprise a layer of thermo-insulating material which is sandwiched between two meta sheets. Hence the name sandwich panel or insulated sandwich panels. The metal sheets induce structural force to the panel.

Sandwich panels are categorized into different types based on the thermo-insulating panels. It can be PUF, EPS, Rockwool, Glasswool. These materials have thermal insulation and acoustic properties. Some of the panels are also fire resistant.