To assess the mould risk on materials, different mould prediction models are available. However, each of these models struggles with shortcomings, which might result in widely varying conclusions. A view on the challenges might come in use when developing novel or upgraded models in view of a more reliable risk assessment. Additionally, this knowledge will stimulate a more thoughtful use of the current models. This article shows a preliminary evaluation of some mould prediction models, and this based on experimental literature data on wood. Although experiments are the input for the model development, discrepancies are observed. Therefore, the difficulties and challenges in experimental mould research are discussed.
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