It could be seen that the results indicated that increasing cement percentages from 0% to 10% caused thermal insulation percentages to decrease from 0% to 2% in comparison to bricks without cement content and with 1% wheat fibre reinforcement. Increasing cement percentages from 0% to 10% caused thermal insulation percentages to increase from 0% to 1.93% with the same fibre content. The figure also showed that the thermal conductivity for barley straw fibre reinforced bricks is higher than wheat straw reinforced bricks.