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1. Quality of Materials The foremost consideration should be the quality of the steel sheets. Look for suppliers that comply with international standards, such as ISO certification or adherence to ASTM specifications. High-quality materials ensure durability and longevity, decreasing the likelihood of repairs and replacements in the future.
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Common surface treatment processes for aluminum doors and windows are electrophoretic coating, fluorocarbon spraying, wood grain transfer coating, anodizing, and electrostatic powder coating. In most cases, after good surface treatment, aluminum profiles have good atmospheric corrosion resistance. It is moisture-proof, sunscreen, flame proof, aging proof, high-temperature deformation proof, low-temperature embrittlement proof, durable and stable, and suitable for various climates.

