Reinforced particleboards were made at several panel densities and with several resin treatments of the fibreglass reinforcing scrims. It was the inclusion of fibreglass scrims that dramatically increased the strength and stiffness of particleboards especially when the overall panel density was above 0.7 gm/cc. Of the various locations tested, reinforcement at the extreme surfaces was found to be the best. Treatment of the fibreglass with phenolic resins produced some improvement in wood-fibreglass bonding, however the addition of a coupling agent significantly improved the fibreglass fixation.