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When evaluating the pros and cons of aluminum doors and windows, there are six main factors to consider:
1. Thickness: Aluminum sliding doors come in different series such as 70 and 90. The 70 series is commonly used for residential purposes, where the number indicates the thickness in millimeters. For sliding windows, common series include 55, 60, 70, and 90. The choice of series should depend on the window size and local wind pressure. If you're installing a sliding window for a closed balcony, it's recommended to go for at least the 70 series to ensure durability.
2. Strength: The tensile strength should be around 157 Newtons per square meter, and the yield strength should be about 108 Newtons per square millimeter. When purchasing, you can gently bend the profile with your hand and check if it returns to its original shape when released. A good quality aluminum profile should be firm yet flexible without any permanent deformation.
3. Color Consistency: The color of the aluminum profiles should be uniform across the entire product. If there's a noticeable difference in color, it may indicate poor quality or inconsistent manufacturing, which could affect the overall appearance and longevity of the product.
4. Flatness: Check the surface of the aluminum profile for any dents, bumps, or irregularities. A high-quality aluminum frame should have a smooth and even finish, free from defects that might compromise its structural integrity or aesthetics.
5. Surface Finish: Look for a clean and glossy finish without visible imperfections such as air bubbles (white spots), ash marks (black spots), cracks, burrs, peeling, or other obvious flaws. These issues can affect both the appearance and performance of the door or window over time.
6. Oxidation Resistance: The oxide layer on the surface should be at least 10 microns thick. You can test this by lightly scratching the surface and checking whether the oxide layer comes off easily. A well-oxidized aluminum profile will maintain its durability and resistance to corrosion, making it a long-lasting option for your home.
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Ningbo Wenhan Fluid Equipments Co., Ltd. , https://www.wenhanvalves.com