Manufacturing processes and transport of building materials are energy-intensive and cause high CO2 emissions. In addition, many building materials pose a health and disposal problem due to their content of disruptive and harmful substances. Regionally available clay can replace conventional materials if appropriately prepared and processed and helps to save both manufacturing processes and transport routes. This project establishes a service for the rapid and low-threshold testing of in-situ clay as well as a network of experts in planning, material and component testing and building physics for the use of clay.