Over the last fifteen years an extensive programme of work on quantifying and predicting creep behaviour of particleboard has been undertaken. This paper first sets out some of the philosophy underlying the selection of test methodology used, and then proceeds to summarise and highlight the principal results obtained under both steady- and unsteady-state environments. Very strong interactions were found in the analysis of variable influencing creep behaviour. The reasons for adopting rheological models as predictive tools are discussed and the merits of a 5-parameter model are illustrated. A 4-parameter model is used to obtain the relative proportions of the three components of creep deflection under different conditions: this procedure clearly demonstrates the significant role of the viscous component in determining creep deflection at high levels of stress and relative humidity.