我单位承接了黑龙江省鸡东县服务楼的改造和接层工程任务。工程主立面全部为塑料窗,它的具体安装方法是:使洞口高度比塑料窗高出70毫米,即在砌筑预留窗洞口时,使窗洞口底标高比塑料窗底皮低70毫米,洞口顶标高与塑料窗顶皮标高相同。这样,室外窗台在去掉50毫米(排水坡25毫米+瓷砖厚5毫米+灰口厚20毫米)的情况下,塑料窗底皮与窗台排水坡的最高处 Our company undertook the task of rebuilding the service building of Jidong County, Heilongjiang Province, and connecting the project. The main facade of the project is all plastic windows. Its specific installation method is to make the height of the opening 70 mm higher than that of the plastic window, that is, to make the bottom of the window opening 70 mm lower than the bottom of the plastic window when laying the reserved window openings. The top elevation of the opening is the same as that of the top window of the plastic window. In this way, when the outdoor sill removes 50 mm (25 mm drainage slope + 5 mm ceramic tile thickness + 20 mm thick ash mouth), the bottom of the plastic window bottom and the sill drainage slope