The decorative surface of doors and windows should not have obvious damage, which means that the protective film on the surface of doors and windows should not have any scratches or scratches. There should be no obvious color difference on the coloring surface of adjacent components on doors and windows. There should be no aluminum shavings, burrs, oil stains or other stains on the surface of doors and windows, and there should be no overflowing adhesive at the assembly joints.

The surface of aluminum alloy is oxidized and polished to a shiny finish. The window sash frame is large and can be fitted with a large area of glass, allowing for sufficient and bright indoor lighting, enhancing the contrast between the virtual and real facades of the interior and exterior, and making the living room more layered. Aluminum alloy itself is easy to extrude, with precise cross-sectional dimensions and high processing accuracy. Therefore, many homeowners choose to use aluminum alloy doors and windows in decoration.