Third, the first main factor exterior insulation material selection: the low thermal conductivity? EIFS because the threshold is not high technology, on standard setting and policy guidance materials tend to system components and the system itself is isolated and there is hysteresis, the domestic part of the design staff for external thermal insulation technology has not been well understood and mastered, For some practices still exist outside insulation vague concept, often we think the choice of external insulation, low thermal conductivity main material, is a good exterior insulation system, insulation board factory in Chongqing, lead to the design and construction of touch, coupled with some enterprises error guide, but also a wide variety of exterior insulation technology, good and bad. From the perspective of building mechanical and thermal engineering in building exterior insulation and external decoration system, it should be regarded as a composite whole structure to study, Shenyang insulation board manufacturer, and it should not be separated into structural layer, insulating layer , crack layer and facing layer research alone. Thermal studies show that after installing insulation, Shaanxi insulation board manufacturers, due to good thermal insulation properties, resulting in the insulation layer, the outer side showing a different thermal environment, therefore, composite structures, it should be based on the sub-insulation layer boundaries to engage in various studies. Based on this understanding, we choose the external wall insulation system for basic analysis. Second, the best choice for exterior insulation system configurations: no cavity? EIFS preference should be given no cavity system that no cavity system compared to the system in terms of a cavity, insulation board manufacturer, its anti-wind pressure, especially strong negative pressure capability, secure greater reliability, It seems to have reached a consensus, in fact, not at all.