Building must be viewed and executed as a constructive unit, placing the concerns of the residents at the center—other options are secondary. How can negative side effects of construction developments be prevented in the interest of the residents' health? This book outlines, based on building physics-functional relationships and natural law principles, what needs to be considered and how to make decisions. It offers experience-based and proven solutions that take into account the necessary thermal, moisture, and health protection, and counters misinformation with consistent education. Content: Fundamental considerations, legal framework conditions, economic efficiency, humane heating technology, thermal protection, moisture protection, sound insulation, questionable DIN regulations, regulations on thermal protection, future-oriented building.