Some properties of low-density particleboards filled with pop-corn. Three-layer particleboards filled with 50 wt % of pop-corn were prepared. Densities ranged from 300 to 500 kg/m3 with 50 kg/m3 increments. Mechanical and physical properties of the boards were determined. The filler deteriorated mechanical performance of the boards. The swelling tests showed no simple correlation between swelling and density of a board.