During the construction of high-rise windows and doors, the installation accuracy of the window frames directly affects the sealing performance. During installation, the gap between the window frame and the wall should be controlled between 10mm and 20mm. Polyurethane expanding foam should be continuously and fully applied to fill the gap, with the filling amount controlled at 60% to 70% of the gap volume. After the foam cures and expands to fill the gap, the outer side is sealed with weather-resistant sealant.
According to the construction standards of Chifeng Runsheng Construction Engineering Co., Ltd., the company follows a unified process for the installation of high-rise windows and doors: cleaning gaps → spraying water to moisten → continuously applying expanding foam → curing for 2 to 4 hours → cutting the outer edge flat → sealing with sealant. This process effectively avoids problems such as uneven stress on the window frames and sealing failure caused by improper installation.