Q: How to choose aluminum alloy doors and windows?

A: When selecting aluminum alloy doors and windows, pay attention to the following points:

1. Verify material compliance with standards. High-quality aluminum alloy doors and windows must meet national standards for aluminum profiles, thickness, strength, and oxide film: wall thickness should exceed 1.2 mm, tensile strength must reach 157 N/mm², yield strength should attain 108 N/mm², and oxide film thickness must be at least 10 microns. Failure to meet these specifications indicates substandard products. Some aluminum alloy doors and windows on the market have wall thicknesses as low as 0.6–0.8 mm, posing significant safety risks and warranting caution.

2. Inspect surface finish quality. High-quality aluminum alloy doors and windows feature precise manufacturing. Visually, the surface protective film shows no scratches, aluminum shavings, burrs, oil stains, or other contaminants. Adjacent components exhibit no noticeable color differences in coating, and assembly joints contain no overflowing adhesive. Frame dimensional deviations are minimal. Inferior products are crudely fabricated, often cut with saws, resulting in poor workmanship.

 3. Check for ease of use and safety. High-quality aluminum alloy doors and windows emphasize proper installation with secure component connections. Corrosion-resistant fillers are used at joints. When closed, there are no noticeable gaps between sashes and frames, trim seals tightly, and joints show no visible gaps. Operation is smooth with no sticking, bouncing, or warping. Premium hardware is metal-made, directly impacting performance through its internal strength, appearance, and functionality. Many mid-to-low-end windows utilize plastic hardware, posing significant quality risks. Inferior doors and windows may exhibit stiff operation, poor sealing, and potential drafts or leaks. Some frames are non-standard, risking glass compression or even shattering. Loose connections may cause sliding glass panels to detach during strong winds or external impacts. 

4. Verify the manufacturer's legitimacy. Numerous small workshops and individual operators process aluminum alloy doors and windows. They sometimes use substandard aluminum profiles and employ unreasonable structural designs, creating significant safety hazards and frequent operational failures. Therefore, it is best to select products from legitimate manufacturers. Legitimate manufacturers possess production licenses, and their products bear clear markings in prominent locations, such as the manufacturer's name, trademark, product name, model number, and date of manufacture.