5), poor thermal conductivity, resulting in promotion does not meet our current energy efficiency standards for 75 Luoyang xps extrusion board, basically belong to EPS insulation material is being phased out. 2, the advantages of XPS insulation system XPS system is that: 1), XPS board has a dense inner surface and closed cell structure. Its thermal conductivity is much lower than EPS with a thickness of Hefei xps extruded sheet, compared with EPS and therefore has better thermal insulation properties. For the same building facades Tianjin xps extrusion board, its thickness can be less than other types of insulation materials. 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 xps extruded sheet, B2 level; the current domestic standards: GB8624-1997 / GB8624-2006 / GB8624-2012, these criteria are based on extruded Oxygen content Board index doing different standard. XPS system shortcomings: 1), high strength XPS board itself, resulting in more brittle plate, easy to bend. 2) higher prices compared to the EPS system.