Supply Several Types of Sandwich Panels and Their Features Sandwich panels by VANHE are modern construction products, which are intended for following use: external and internal walls, roofs and extended ceilings. The major benefits are: fast and easy assembly (shorter installation time and lower total investment cost) and less operation costs of the building thanks to very good thermal parameters. In our offer you will find sandwich panels with different types of core: rigid polyurethane foam PUR/ rigid polyisocyanurate foam PIR expanded polystyrene EPS mineral wool core MW The following charts present differences of thermal properties between insulation materials which are used as sandwich panel core. Sandwich panels with mineral wool are used because of fire regulations. EPS cored panels are the cheapest way to make a building envelope. Finally, continuous PUR core is the best in terms of thermal insulation and final appearance.