The transfer of theoretical learning content to the practical application of previously unregulated bio-based building materials is the focus of this technical book. To this end, planning and design principles of thermal, moisture and sound insulation are presented and demonstrated using new types of natural fibre-reinforced plastics (NFK) in façade applications. Results from current research on LFPs and in particular on wood-plastic composites (WPC) are explained in a comprehensible way and presented graphically. It is aimed at students of architecture and civil engineering and offers numerous exam-like exercises and sample solutions to reinforce the contents. Students learn the basics of building physics and practise their application to concrete problems in building design. In addition, they can repeat and consolidate their acquired knowledge in a variety of exercises with a high level of practical relevance. Specialist planners will gain new perspectives on the selection of materials and their use in building components with the potential for more sustainability in the building industry.