The results of building diagnostics form the basis for deriving the necessary measures for damage rectification. They provide essential insights into load-bearing capacity, usability, and durability. This volume from the "Building in Existing Structures" series offers renovation professionals and experts an overview of this complex topic. All phases of building diagnostics are thoroughly explained, from preparation to quality assurance. Practical examples, protocol templates, checklists, forms, as well as explanations and definitions of technical terms complete the content. Key points from the content include: procedures in building diagnostics, types of damages and defects in structures and their causes, and analysis of weaknesses and damage points.