For insulation in terms of Nanyang extruded sheet, mainly to see the thermal inertia index D, D coefficient is proportional to the value of the accumulator. But on the whole system, regenerative 200mm of concrete has been big enough, plus exterior insulation layer Wanzhou extruded sheet, fully meet the energy requirements. It is also integrated with national regulatory requirements of the wall thermal conductivity and heat storage coefficient of reasons to be satisfied. EPS or XPS thin plaster systems fully meet the requirements. 2. Strength: The strength should be noted here that the tensile strength, density and tensile strength of polystyrene board have absolute relationship, the average EPS density 18Kg / m3 tensile strength of 110 ~ 120KPa extruded board, 20Kg / m3 bulk density of about 140KPa. XPS normal bulk density from 25Kg ~ 45Kg, intensity from 150KPa ~ 700KPa or higher. (Only if it meets the thermal conductivity of about 0.03). 5), XPS board in our country after 10 years of development, has been a lot of attention and promotion. And the formation of a national xps insulation system standards. 6), XPS panels on combustion levels, with fire class A, B1 level, B2 level; the current domestic standards: GB8624-1997 / GB8624-2006 / GB8624-2012, these criteria are based on extruded plate oxygen index doing different content standards. Excellent corrosion resistance of closed-cell polyurethane foam structures and surface material used, it has superior resistance to air and water-air performance, and it can be made at the time of forming the mosaic connection structure, easy to assemble later. It requires no additional insulation moisture, eliminating many laying insulation trouble. These properties are other insulation materials can not simultaneously possess;