Look at the profile. You can look at the contour and wall thickness of the product. According to national regulations, the wall thickness should not be less than 1.2mm, which is more resistant to wind pressure and more stable. However, the thicker the better. For normal aluminum alloy doors and windows, 1.6mm is enough. See if the profile is broken. Broken aluminum has better heat and sound insulation performance than ordinary aluminum.

2/5

Look at the craft. The main processes are the surface treatment process and cutting and assembly process of profiles. Surface treatment is generally divided into: fluorocarbon spraying, color electrophoresis, powder spraying, ordinary oxidation, wood grain thermal transfer and so on. The cutting process mainly depends on whether the edges and corners are flat and whether the openings are smooth.

3/5

Look at the glass. Double-layer hollow tempered glass is the best choice, which not only has good sound and heat insulation performance, but also has much better safety than ordinary glass. The thicker and more hollow the glass, the stronger the sound insulation performance.

4/5

Look at the appearance. As a part of house decoration, doors and windows are also essential. See if the overall design is beautiful. Personally, I like the feeling of broadening my horizons. I can choose the narrow series, with large glass and sufficient vision.

5/5

Look at pulleys, handles, hinges, hinges and other hardware. Pulley mainly depends on whether the push-pull is smooth, whether there is noise or not, and whether there is jamming. Holding hands mainly depends on color, style, feel and smoothness. It is recommended to choose a hinge with anti-fall, which is safer. The hardware market is complex, so it is recommended to choose foreign brands, such as Noto, Weibichi, Gith, Wu Ge, etc.