In this study, the coefficients of thermal conductivities have been determined. The goal was to find out the best insulator among the recyclable and locally available materials which can be adapted for use to replace the existing thermal insulation. Rice husks, dry grass,  sawdust, and old/used newspapers have been studied in this study using Lees’ disc method. The results showed that grass can do best as an insulating material though all the samples can be used as insulators. They all have low thermal conductivities. The coefficient of thermal conductivities ranged from 0.226 W/mK for grass, 0.270 W/mK for sawdust, 0.500 W/mK for rice husks and 1.930 W/mK for the newspaper cut-outs. Due to their local abundance, and no much competition for commercial interest, we recommend the studied materials as suitable thermal insulators.