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 outstanding advantages of broken bridge aluminum alloy insulated doors and windows are light weight, high strength, good water and air tightness, good fire resistance, large lighting surface, resistance to atmospheric corrosion, long service life, good decorative effect, and good environmental performance.