Damage to windows accounts for a significant portion of the damage rate in the exterior wall area. The drastically increased demands on modern windows often lead to planning and execution deficiencies. Anyone looking to build without damage must engage in a thorough examination of the building physics fundamentals and the relevant standards and guidelines. The newly revised edition of this volume, completely updated and supplemented with essential chapters by Hans H. Zimmermann, reflects the current state of knowledge regarding windows and window walls in both old and new buildings.