Karl Rösler  Winter 2021/2022

(Co-supervision with Prof. Dr.-Ing. Frank Petzold)

The preservation of existing buildings will be an important instrument for achieving climate neutrality. Planning and building in existing structures will therefore become even more important in the future building sector. BIM is a planning and documentation standard that is mainly used for new buildings. Based on this standard, a BIM solution has been established for the documentation of historical buildings under the name Heritage or Historic BIM (H-BIM). In order to analyze whether these two standards can be used in the context of a concept transfer for the use case of design and construction in existing buildings considered here, relevant influencing factors and working methods of common building survey methods for ordinary existing buildings are first determined. As a result, specific requirements for a working method BIM in the existing buildings are identified. On this basis, a partial implementation of the transferred method BIM in the existing buildings was then carried out. The results of this partial implementation indicate a currently limited usability of BIM for a building survey and documentation of existing buildings. Limitations are mainly caused by a lack of alignment of the workflows. These include the specification of incompatible guidelines and the lack of suitability of BIM software for the existing building sector. The latter usually results in laborintensive, manual steps in modeling based on raw data. The creation of mockups will ultimately demonstrate which further adaptations and developments can make the BIM working method in the existing building stock suitable for increased practical application.