Sandwich panels are assembled roof and wall elements that have excellent insulating characteristics thanks to the integration of insulating material. They consist of two thin metal cover sheets, which are shear-resistant and are bonded to one another on an insulated core. The insulated cores normally consist of rigid polyurethane foam , expanded polystyrene foam, phenolic foam, cellular glass and mineral wool (MW) as well in order to meet the fire prevention requirements. Sandwich panels are produced by discontinuously or continuously running production processes and cut to ordered lengths. The surfaces can also exist of lined, trapezoidal or corrugated profiles, depending on the customer's requirements.

Sandwich panels due to their physical, mechanical and design properties are available for a variety of applications: roof and wall, ceiling . They are used in industry and in residential sector, and the two sectors can be used in both new construction and rehabilitation. Some of the applications where we can find sandwich panels are:

• Industrial buildings

• Public buildings

• Offices and administration buildings

• Cold storages

• Clean rooms

• Agricultural buildings

• Power plants

• Residential houses