Extensive indoor environment data generated from hundreds of comprehensive building moisture and condition assessments of public Finnish buildings has and will be collected into a structural database and analysed statistically. The dataset contains tens of thousands of technical measurements and classified microbial, chemical, and mineral fibre samples. According to Finnish guidelines, the assessments have been made by certified building health experts and both the assessed buildings and collected data are highly categorized. In this paper, the current state of the project, that will be completed in 2024, is reported together with the first preliminary results. As a preliminary result based on the total of 277 comprehensive assessments, there is no significant statistical difference in the prevalence of significant damp and mould damages between the assessments made due to an IAQ problem or without. On the contrary, the analysis of 3954 MMMF samples analysed in four laboratories revealed statistically significant differences (p<.001) between the laboratories.