一般传统的保温隔热屋面工程的施工顺序是：结构层→找平层→保温层→找平层→防水层（三毡四油一砂或三布四油）→架空隔热层。由于基层为刚性结构，当基层混凝土或水泥砂浆找平层的体积收缩、温度应力、等因素使混凝土或水泥砂浆层产生开裂。而防水层大多采用柔性卷材，紧贴 The construction sequence of conventional traditional thermal insulation roof projects is: structural layer → leveling layer → insulation layer → leveling layer → waterproof layer (three felts, four oils, one sand, or three cloths, four oils) → overhead insulation layer. Because the base layer is a rigid structure, the concrete or cement mortar layer cracks when the volume shrinkage, temperature stress, and other factors of the base layer concrete or cement mortar screed. The waterproof layer is mostly made of flexible coils.