Poly(ethylene vinylacetate)/clay nanocomposites were prepared by a "one pot" method, using Cloisite-Na+ with a compatibilizer at different ratios. The nano-composite prepared was used to prepare a flame retarding polymeric foams. Flame retarding properties were examined by the limiting oxygen index and cone calorimetry. CO and CO2 production were reduced remarkably by using the nanocomposite in EVA blends.