Infra-Lightweight Concrete acts as load-bearing heat insulation and promises durable, sustainable and attractive fair-faced concrete structures. A building made of this high performance lightweight aggregate concrete in 2007 was presented in this journal. Since then, while maintaining the heat insulating properties, the compressive strength has been doubled. This paper presents both the associated research and further development at the Technische Universität in Berlin as well as a wall mock-up for a pavilion which was awarded with an innovation price by the Holcim Foundation.