The improvement in strength characteristics observed in this study are similar to those reported by Troger et al. (1998) who used Flax fiber and straw as reinforcements in Spruce and Beech particleboards. Using 3–6% Flax fiber and straw, approximately 20–60% increase in bending properties was observed in 5.5% pMDI bonded particleboards of thickness 20 and 38 mm and density 715 and 750 kg/m3 respectively. This increase particularly for the Flax fiberreinforced particleboards was ascribed to the fiber properties and not necessarily the proportion of fiber used.