Waste generation in Nigerian cities continue to rise with increasing population. Where and how to effectively and efficiently channel these wastes remains a serious challenge for the nation. In this study, plastic and paper waste samples were collected – as received, dried and sorted manually into sub-fractions, pulverized and homogenized in prescribed mixing ratio by weight, and compacted into briquettes. The elemental analysis to determine the carbon (C), hydrogen (H), nitrogen (N), sulphur (S), and oxygen (O) content of the samples was carried out in accordance with ASTM D3176-15 standard using an element analyzer. While, thermogravimetric tests were performed on the samples in a thermal analyser according to IUPAC procedure. The results revealed that; plastic –paper composite samples in the group exhibited a lower elemental carbon and hydrogen than the pure (PL100) plastic benchmark; the tested composite samples displayed a comparably higher presence of elemental oxygen, with exception of the composite sample with 25wt%. of paper; it was evident that plastic-paper composite samples with 25 wt%., 50wt%., and 75wt%. of paper exhibited 0.08 %, 0.04 %, and trace % increase in sulphur content, while for sample with 100wt%. of paper showed a decrease in elemental sulphur by 0.04wt%. Based on the peak temperature at the maximum weight loss rate indicating sample combustibility, samples PL100 with DTG peak temperatures (417.08- 474.62 ^oC), PL50+PA50 (383.27- 441.47 ^oC) and PL75+PA25 (373.70- 426.41 ^oC) are more combustible than samples PL5+PA95 (322.52+ 402.05 ^oC) and PA100 (367.48 ^oC), and would be recommended for use as refuse-derived fuel for on account of their energy recovery potentials.