Purchase home decoration doors and windows, see 6

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doors and windows are selected for home decoration. The surface quality of aluminum alloy doors and windows directly affects the decorative effect of the whole wall after installation. When checking the surface quality of doors and windows, attention should be paid to the following six aspects of materials:

1 Flatness: check the surface of aluminum alloy profile, and there should be no depression or bulge

2. Chromaticity: the color of the same aluminum alloy profile should be consistent. If the color difference is obvious, it is not suitable for purchase

3. Oxidation degree: the thickness of oxide film should reach 10 microns. When purchasing aluminum alloy doors and windows, you can scratch the surface of the profile to see whether the oxide film on its surface can be wiped off

4. Gloss: aluminum alloy doors and windows should avoid choosing profiles with open bubbles (white spots) and ash (black spots) on the surface, as well as cracks, burrs, peeling and other obvious defects

5. Strength: the tensile strength should reach 157 Newtons per square millimeter, and the yield strength should reach 108 Newtons per square millimeter. When purchasing aluminum alloy doors and windows, you can bend the profile moderately by hand, and it should be able to return to its original state after you let go

6. Thickness: there are 70 series and 90 series aluminum alloy sliding doors, and 70 series aluminum alloy sliding doors inside the house can be used. The number of series represents the number of millimeters of the structural dimension of the door frame thickness. There are four kinds of aluminum alloy sliding windows: 55 series, 60 series, 70 series and 90 series. The selection of series should be based on the size of the window opening and the local wind pressure value. Aluminum alloy sliding windows used as closed balconies shall not be less than 70 series


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