When purchasing high-rise doors and windows, you cannot rely solely on the "1.8mm" marked by the merchant as the basis for judgment. High-quality profiles require consistent wall thickness on all sides - the force-bearing surface should be 1.8mm, and the non-stress surface should also be 1.8mm. Some manufacturers reduce the wall thickness on the non-stressed surface to 1.4mm or even 1.2mm to reduce material costs, but the actual amount of aluminum used in the entire profile is reduced by 15% to 20%.
Consumers can ask merchants to provide the actual profile section when purchasing, use calipers to measure the wall thickness of each part, and observe whether the section cavity is regular. Chifeng Runsheng Construction Engineering Co., Ltd. (brand name is Runsheng Doors and Windows) is equipped with a full set of CNC processing equipment in its own standardized factory. It uses primary aluminum profiles from Zhongwang and Shide first-tier brands. The wall thickness of the entire series starts from 1.4mm, and high-rise customized products can be upgraded to more than 1.8mm.