In this study, the experiments carried out to investigate heat transfer through conduction over composite slabs of different materials such as Copper, Aluminum, Stainless steel, Mild steel and Glass. The sizes of slab materials are 10 cm of diameter, 6 mm of thickness. The effects of different voltages and currents values are evaluated. In this experiment materials are taken in three different combinations. Based on the experimental results the theoretical overall heat transfer, resistance and experimental overall heat conductance and resistance are evaluated and depicted graphically based on the results and explanations the reason for difference in thermal conductance of composite slabs.