Natural building materials have the great advantage that they do not require as much energy to produce. D: Stefan, great to have you here! S: My pleasure. Thanks for the invitation! D: We've known each other for quite a while now – would you like to briefly introduce yourself to our readers? S: Sure. I ... Building biology Building with hemp Clay building Energy consultancy Energy costs Hemp Insulation Primary energy Renovation nature-oriented building Feb 28, 2023