Resource scarcity, exploding raw material prices and energy costs as well as an increasing shortage of skilled workers are currently major challenges for the construction industry. Driven by population growth and changing lifestyles, the demand for housing is increasing at the same time. Currently, 11% of global energy and process-related GHG emissions are caused by building products, which highlights the relevance of this sector. However, solving the issue of sustainability through the choice of building material is too short-sighted.