Expanded polystyrene (EPS) ,often referred to as Styrofoam, is made from polymer impregnated with a foaming agent which, exposed to steam, creates a uniform closed cell structure highly resistant to heat flow and moisture penetration. It is one of the least expensive , most cost effective rigid foamed plastic insulations and is an excellent material for thermal insulation applications .Light weight ,rigid, closed cell material, EPS has high compressive strength but easy to handle and install. It can be cut to fit with a sharp knife. EPS ,expanded polystyrene is used in packaging, building insulation and safety equipment. It is a highly valued product due to its durability, versatility ,sterility, thermal insulation, shock absorbency and recyclability. EPS is produced in a wide range of densities providing a varying range of physical properties. These are matched to the various applications where the material is used to optimise its performance and strength.