Building information modeling (BIM) is a powerful collaboration and project delivery concept which is becoming popular in the architectural and engineering practice. Software developers are constantly extending the boundaries by introducing new features into their programs, such as support for an integrated workflow, thus inviting different specialists to participate in the project at earlier design stages. These type of contributions highlight the importance of decisions concerning the most effective method to export information, invariant of the chosen data model, be it IFC or gbXML. Extensions to existing software are also considered, i.e. plugins. Export of simple geometries is tested within three BIM platforms: ArchiCAD, Allplan and Revit. The main focus of the presented test is exporting of the building materials data and its preservation in the IFC and gbXML format, specifically for import into thermal simulation tools. The application and capabilities of EnergyPlus and ArchiPHYSIK are explored. We summarize our results as a sequence at guidelines and recommendations suggesting optimal workflows for each BIM platform, as well as design for -Customizer-application, which assists in mapping of the needed data, on a per application basis, from IFC or gbXML to the IDF files usable to ArchiPHYSIK and EnergyPlus.