Conservation compatible energy retrofit technologies: Part II: Documentation and assessment of conventional and innovative solutions for conservation and thermal enhancement of window systems in historic buildings

This report is basically divided into three chapters. The first chapter (chapter 2.1) describes basic window properties to give an overview of the energy efficiency-related aspects of window solutions. The second part forms the core of this report and contains the documentation of 15 different window solutions categorized based on the impact of the interventions. For the documentation of the solutions, simple open questions were answered by the partners of SHC Task 59 and the ATLAS Interreg Project in order to enable a continuous structure of the solutions. The solutions are basically divided into four groups: Chapter 2.2 Solutions with low impact, Chapter 2.3 Solutions with impact on the appearance from inside, Chapter 2.4 Solutions with impact on the appearance from outside (and inside) and Chapter 2.5 Solutions with impact on the whole window. The third part of this report contains an evaluation method for the renovation solutions for windows. For this purpose, the assessment categories according to EN 16883 were taken as a basis and adapted in detail for windows. In order to illustrate the detailed assessment, two different solutions were tested using the adapted assessment criteria and are included in the last chapter of this report.