MODELING DECAY IN HBIM TO DOCUMENT, KNOWLEDGE AND PRESERVE CULTURAL HERITAGE

It is an achieved concept that HBIM is a very useful system to manage all information about architectural heritage. Any activity or intervention on historical buildings requires scientific and professional collaboration between several disciplines, starting from the metric and documentary survey to the design, maintenance, restoration, conservation and valorisation of the manufact. In fact, BIM platforms continuously develop tools and the scientific community processes workflows to simplify and implement the process of knowledge, management and protection of historic buildings by creating a digital twin as rich as possible of information. Nowadays metric surveying techniques make it possible to generate photorealistic 3D point cloud models with more data about the appearance of manufact’s surfaces, possibly also recording decay symptoms. This registration is only visual, because the point cloud, as is well known, is a replacement for what the instrument eye sees. The possibility of being able to manage through a single model a large amount of data, including the state of conservation of a building, in recent years has seen the experimentation of many solutions for the documentation of decay phenomena in BIM systems. In this scenario, this paper presents the workflows and solutions tested by the authors for documenting degradation in historic buildings for management and documentation purposes.