外墙保温隔热是节能建筑的主要措施之一,一旦保温层、保护层发生开裂,墙体保温性能就会发生很大改变,非但满足不了设计的节能要求,甚至会危及墙体的安全。下面对建筑材料在外保体系开裂中的影响作以下论述:一、保温隔热材料1膨胀聚苯板。用于外墙保温的聚苯板主要是密度在18.0～22.0kg/m3、尺寸稳定性≤0.30%的阻燃型膨胀聚苯板。由材料因 External wall insulation is one of the major energy-saving building measures, once the insulation layer, protective layer cracking, wall insulation properties will change greatly, not only can not meet the energy-saving requirements of the design, and even endanger the safety of the wall. The following building materials in the protection system cracking in the following discussion: First, the insulation material 1 expanded polystyrene board. Mainly used for thermal insulation of polystyrene board is the density of 18.0 ~ 22.0kg / m3, dimensional stability of ≤ 0.30% flame retardant expanded polystyrene board. Due to material