1. Good heat preservation: Some of the better doors and windows are made of heat-insulating materials, so they do not conduct heat. From here, it can be seen that its heat-insulating effect is much better than ordinary doors and windows.

2. Good sound insulation: Many high-end doors and aluminum extrusion profile have undergone precise calculations and careful planning. The requirements are not only to have tight seams, but also to meet the national A-level standards.

3. Good impact resistance: Most high-end doors and windows have metal structural materials at both ends of the surface, which have excellent wind pressure resistance.

4. Good airtightness: The more common first-class doors and windows have excellent airtightness, and then give full play to the air-conditioning effect, and can also save energy.

5. Good water tightness: Generally, first-class doors and windows are designed with a rain-proof ditch, which can completely isolate rainwater from the outdoors.

6. Good fire resistance: Aluminum alloy, also known as metal structural material, is a high-strength metal material, which is not only fireproof, it is not easy to deform at high temperatures, and does not meet the burning conditions.

7. Good anti-theft: first-class doors are equipped with first-class decorative locks, which will make it impossible for malicious thieves to start.

8. Maintenance-free: Generally, first-class doors and windows are not easy to corrode, and will not change color, almost no maintenance, there are dirty things on the surface, you can wipe it with a soft cloth and water detergent, and it will be as clean as ever after cleaning.

9. High-end: high-end doors and windows are not only high-end atmosphere, but also high-end.