The outstanding thermal performance of EPS Cement Sandwich Wall Panel comes from its unique composite structure that combines dense cement layers with a high performance closed cell EPS foam core. The closed cell structure inside the EPS core of EPS Cement Sandwich Wall Panel traps millions of tiny static air pockets that act as extremely effective barriers against heat transfer giving the entire panel a very low thermal conductivity value below 0.35 W per meter Kelvin. This means a standard 125mm thick EPS Cement Sandwich Wall Panel can provide better insulation effect than a 300mm thick solid clay brick wall even without adding any extra external insulation layers. In summer the EPS Cement Sandwich Wall Panel effectively blocks outside solar heat from penetrating into the indoor space keeping interiors naturally cooler and reducing the workload of air conditioning systems significantly. During winter the same panel prevents precious indoor heat from escaping to the cold outside helping spaces stay warmer for longer with much less heating energy input. Independent third party energy simulation tests have proven that buildings constructed with EPS Cement Sandwich Wall Panel can easily meet the strictest national energy efficiency standards for both hot summer and cold winter climate zones.