The aim of the project is to develop new, particularly energy-efficient concepts with composite materials based on paper, mineral building materials and plastics for functionalisation (e.g. for adhesion promoters or hydrophobisation). These concepts should be particularly suitable for constructing energy-efficient components, e.g. for building envelopes. Energy efficiency refers both to the thermal insulation properties during application in the building and during the production of the material itself and during the application of the materials.