某单位住宅楼及办公楼,已经交付使用多年,底层墙裙以下部位严重泛霜,油漆起皮脱落,抹灰层起鼓剥落,这些都是由于防潮层的失效造成的。一般砖混结构在底层适当部位应设置防潮层。由于粘土砖孔隙率比较大,很容易在潮湿环境里吸收水分,故其基础墙中均应设置水平防潮层。根据工程需要,设计上都考虑到这一点。例如,青海省的基础图集 QG727中就 The residential buildings and office buildings of a certain unit have been delivered for many years. The following parts of the bottom wall skirts are heavily frosted, peeling off the paint, and peeling off the plaster layer. These are caused by the failure of the moisture barrier. In general, the brick-concrete structure should be provided with a moisture-proof layer at an appropriate position on the bottom layer. Due to the relatively large porosity of clay bricks, it is easy to absorb moisture in a humid environment. Therefore, horizontal moisture barriers should be installed in the foundation walls. According to engineering needs, this is taken into account in the design. For example, the basic atlas QG727 in Qinghai Province