A sandwich wall consists of a structural layer transferring forces exerted by loads from other building elements, an insulation layer ensuring appropriate thermal insulation parameters and an external layer to finish the façade.

HOCH XPS extruded polystyrene board is a very good material that fulfils all the tasks expected from an insulation layer in a sandwich wall. This is due to its excellent thermal insulation properties, which perfectly protect the building against heat loss and heating-up in the summer.