Key parameters of doors and windows revealed - don，t be fooled by merchants!

When choosing doors and windows, apart from the material and glass, the core parameters directly determine the durability and performance of the doors and windows. These key parameters must be firmly remembered to avoid being cheated by the merchants.

1. Profile wall thickness: It determines the strength of the doors and windows. The thicker the wall thickness, the better the wind pressure resistance and less deformation. For household use, it is recommended to be ≥ 1.4mm. For high-rise buildings, large glass (such as floor-to-ceiling windows), it is recommended to be ≥ 1.8mm. Profiles with a thickness lower than 1.4mm are not recommended for the main living spaces of home decoration, as they have poor durability. 

2. Thermal insulation strips: The "core essence" of break-and-bridge aluminum windows, directly affecting the insulation effect. High-quality thermal insulation strips are made of PA66 nylon material, which is resistant to high temperatures, does not age easily, and has excellent insulation performance; inferior thermal insulation strips are made of PVC material, which is prone to aging and deformation. They lose their insulation effect within 1-2 years and are often used by merchants to cut corners. Be sure to carefully distinguish them. 

3. Sealing gasket: It determines the sealing performance of doors and windows (no air leakage, no water leakage). High-quality gaskets are made of EPDM rubber, which has good elasticity, is resistant to aging, provides tight sealing, and has a long service life; inferior gaskets are made of ordinary rubber, which is prone to cracking and hardening. Over time, they will cause air and water leakage, affecting the comfort of living. 

4. Hardware Components: The "heart" of doors and windows, they directly affect the operation feel, sealing performance and safety, and even determine the service life of the doors and windows. High-quality hardware components (such as imported brands or domestic well-known brands) have smooth operation, good load-bearing capacity, and are less prone to rust and jamming; inferior hardware components are prone to rust and breakage, and need to be replaced within 1-2 years. It is recommended to choose brand hardware components first. 

5. Performance Parameters: The key factors to consider are water tightness (no leakage when it rains), air tightness (no air leakage), and wind pressure resistance (no deformation at high altitudes). For household doors and windows, it is recommended to choose those with water tightness ≥ 6 levels, air tightness ≥ 7 levels, and wind pressure resistance ≥ 9 levels, which can adapt to most household usage scenarios.