Extruded Polystyrene Thermal Insulation Material can be used for various climatic conditions. The Thermal Insulation Material has a high compressive strength to enable it for over deck, floor, machine or plant room etc. The Thermal Insulation Material has high thermal resistance property that is a result of arresting or millions of tiny closed air cell separated from each other in a unit block. Extruded Polystyrene Thermal Insulation Material keeps its resistivity or resistance to heat flow value retained even after its long exposure to high humidity, ground water, freeze thaw cycle and other extreme climatic conditions.