We studied the possibility of using straw to manufacture the particle type boards. We made boards with density among 200 and 400 kg/m3. A board from straw was used as a core layer for lightweight panel, while 8 mm particleboard as a surface layer. Thickness swelling, compression strength, bending strength and heat conductivity were determined. Heat conductivity was determined by one sided exposure to 40, 60 and 80 °C. The temperature difference between 2 opposite sides was 15, 35 and 55 °C. We have determined that the board with density 200 kg/m3 swell more then denser boards. The highest resistance towards compression was observed at the boards with higher density, where also the highest bending strength was observed. Slowest increase in temperature was determined at boards with 300 kg/m3 density.