1. Check the material

The main materials used for aluminum alloy windows generally include three types: aluminum profiles, glass, and hardware. The wall thickness of aluminum profiles used for high-quality aluminum alloy windows should not be less than 1.2mm, and the thickness of the oxide film should reach 10 micrometers; Tempered glass is better than ordinary glass; Stainless steel hardware accessories (such as screws, hinges, handles, etc.) are better than aluminum accessories.

2. Check the surface quality

The quality of the surface of doors and windows directly affects the decorative effect of the entire wall after installation. When checking the surface quality of doors and windows, attention should be paid to the following aspects:

A. The protective film on the surface of doors and windows should not have scratches or scratches;

B. There should be no obvious color difference on the surface of adjacent components on doors and windows;

C. There should be no aluminum shavings, burrs, oil stains or other stains on the surface of doors and windows, and there should be no adhesive leakage at the assembly joints.

3. Look at the surface color

The color of toxic aluminum alloy doors and windows is white, although white, it gives a very intuitive feeling of "stunned", that is, it is dark or white to blue, with a strong sense of smoothness. After using it for a period of time, it gradually turns gray black due to sulfur and sulfide pollution in the atmosphere. The non-toxic aluminum alloy doors and windows are pure in color, resembling ivory white, with a smooth and translucent feeling. They have a feeling of penetration into the interior, and will not turn gray black due to sulfur and sulfide pollution in the atmosphere.

4. Look at the sealing strip

The contact between the aluminum alloy door and window sealing strip and the glass and glass groove should be flat, without curling or slotting. When the door and window are semi closed, there should be no obvious cracks between the fan and frame, and the sealing strip on the sealing surface should be in a contracted form.

5. Check performance

The performance of aluminum alloy windows usually needs to consider the following aspects: strength is reflected in whether the material selection of aluminum alloy windows can withstand ultra-high pressure; The airtightness is mainly reflected in the tightness of the inner and outer frame structures of the window; The water tightness mainly assesses whether there is water accumulation or leakage in aluminum alloy windows; The soundproofing mainly depends on the soundproofing effect of insulating glass, other special soundproofing and airtight strip structures, as well as the durability of other window accessories such as opening and closing force and opening and locking durability.

6. Check the guide rail and pulley

The guide rails of sliding doors and windows must be smooth and smooth, and maintain good contact with the sliding fan, without vibration, misalignment, or looseness during the sliding process; The pulley requires excellent quality, load-bearing without fragmentation, smooth rolling, and no noise during use to ensure a quiet and comfortable indoor environment.