1. Flow gradient of air conditioning board, line, etc

EPS构件外保温墙体易渗漏的部位主要包括：线条、空调板、飘窗板、女儿墙、门窗洞口等部位。这些部位都有一个共同的特点：排水速度慢。由于主体施工偏差以及外保温施工偏差的存在，流水坡度太小甚兜水，由于防护面层并不是不透水的，必然会导致保温墙体的渗漏。

The easy leakage parts of EPS component external insulation wall mainly include: line, air conditioning board, floating window board, parapet, door and window opening, etc. These parts have a common feature: slow drainage speed. Due to the main construction deviation and external insulation construction deviation, the running water slope is too small or even water is carried. Because the protective surface layer is not impermeable, it will inevitably lead to the leakage of the insulation wall.

2、EPS构件外保温施工前，应提前安装预埋管件

2. Embedded pipe fittings shall be installed in advance before EPS component external insulation construction

根据规范要求，应在外保温施工前将落水管卡、空调孔、空调支架等各种预埋管件提前安装完毕(向下有一定的斜度)，而在实际施工时，往往因为工期等各种原因，各种预埋管件后安装，破坏了防护面层的整体性，若是修补不到位，必然会导致墙体渗漏。例如：落水管卡部位就是外保温常见的渗漏部位之一。

According to the specification requirements, various embedded pipe fittings such as downcomer clamp, air conditioning hole and air conditioning support shall be installed in advance (with a certain slope downward) before the external insulation construction. During the actual construction, various embedded pipe fittings are installed after the installation due to various reasons such as construction period, which destroys the integrity of the protective surface. If the repair is not in place, it will inevitably lead to wall leakage. For example, the downcomer clamp is one of the most common leakage parts of external insulation.

3、保温层不能挡住门窗泄水孔

3. The insulation layer shall not block the drain holes of doors and windows

先安装门窗再进行外保温的施工，是目前常采用的施工工序，也是规范所允许的，但后做保温必然存在外保温“吃口”的问题，在施工时应特别注意门窗下口的保温层高于门窗泄水孔的高度，泄水孔内水直接进入保温层内。

Installing doors and windows first and then carrying out the construction of external insulation is a commonly used construction process at present, which is also allowed by the specifications. However, there must be a problem of "eating" of external insulation. During construction, special attention should be paid to that the insulation layer at the lower opening of doors and windows is higher than the height of the drain hole of doors and windows, and the water in the drain hole directly enters the insulation layer.

4、聚苯板的板缝处理

4. Seam treatment of polystyrene board

在聚苯板薄抹灰外保温体系中，板与板之间的板缝是体系中薄弱的部位，沿板缝开裂是目前的外保温应用中的常见现象，因而板缝的处理非常关键。根据规范要求，大于1.5mm以上的板缝可以采用EPS板板条填塞，而在实际施工中，很难有合适厚度的板条，大多简单处理，有的干脆不处理，甚有的采用粘结剂填补板缝。从而易造成板缝开裂导致墙体渗漏。因而正确的板缝处理是防止外保温体系开裂及渗水的重要施工工序。

In the polystyrene board thin plastering external insulation system, the plate joint between plates is the weakest part of the system. Cracking along the plate joint is a common phenomenon in the current application of external insulation, so the treatment of plate joint is very key. According to the requirements of the specification, the slab joints greater than 1.5mm can be filled with EPS slab. However, in the actual construction, it is difficult to have a slab with appropriate thickness. Most of them are simply treated, some are not treated at all, and some even use adhesive to fill the slab joints. Thus, it is easy to cause cracking of slab joints and wall leakage. Therefore, correct plate joint treatment is an important construction process to prevent cracking and water seepage of external insulation system.

平窗口部位：在目前外保温构造图集中，平窗口大多采用先安装窗框再做保温，大多甲方因此设计存在外保温“吃窗”以及不利于窗户的保护等一般不愿采用，而后装窗易于破坏保温导致漏水，针对此问题，我们可以采取砂浆做企口(现浇结构可直接浇注成型)的方案，既便于施工，又利于防水，其节点构造图。窗侧口保温由于采用薄板施工，可以采用满贴法以利于提高窗口部位的抗渗漏性。

Flat windows: in the current set of external thermal insulation structural drawings, most flat windows are installed with window frames before thermal insulation. Therefore, Party A is generally reluctant to use external thermal insulation "eating windows" and not conducive to the protection of windows. Later installation of windows is easy to damage the thermal insulation and lead to water leakage. In view of this problem, We can adopt the scheme of mortar as tongue and groove (cast-in-situ structure can be directly cast and formed), which is not only convenient for construction, but also conducive to waterproof, and its node structure diagram. Due to the thin plate construction, the full paste method can be used to improve the leakage resistance of the window.