tThe objective of this study was to reinforce particleboard products with natural bast fibers which havehigh tensile strength and stiffness-to-weight ratios. Three-layered particleboards were manufacturedfrom Wood, Hurd and Shive particle furnish and reinforced in the upper and lower face layers withaligned Flax and Hemp fiber mats. Control particleboard samples were manufactured from 100% Wood,Hurd and Shive furnish for comparison purposes. Mechanical and physical strength properties wereconducted according to ASTM D1037-6a and ANSI standards for medium density particleboard.