As the steel doors and windows have a series of advantages such as machinability, energy saving and sound insulation, they are becoming a trend in the construction field. In the selection of steel doors and windows must not be sloppy, while the distinction between plastic steel doors and windows of quality and grade is mainly divided into three steps.
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First, look at UPVC profiles, because UPVC profiles are decisive factors in the quality and grade of plastic steel doors and windows, a good UPVC profile should be a reasonable design of multi-cavity, wall thickness, formula containing anti-aging, anti-ultraviolet additives, from the outside Look should be smooth, blue and white. In the daily selection, many people think that plastic doors and windows should be white, but it is not true. High-grade UPVC profile color should be white and blue, this color anti-aging performance is good, in the outdoor wind and sun will not aging, discoloration, deformation. The medium-to-low profile is yellow in white, which is poor in sun protection. After a few years of use, it will become more yellowish, until it ages, deforms, and becomes brittle. The reason for this is that the profile formulation contains too much calcium. Consumers can ask manufacturers for different sections of profiles to compare together.
Second, look at the hardware, which is very important for doors and windows, the hardware of high-end doors and windows are made of metal, its internal strength, appearance, and use have a direct impact on the performance of doors and windows, and many middle and low steel doors and windows are selected plastic hardware There is a great deal of risk in its quality and life.
The last resort is mainly to see whether the appearance is smooth and non-destructive, whether the welding corner is clean and tidy, whether the sliding window is flexible, whether the opening window is open freely, whether the doors and windows are sealed tightly, whether the hardware is matched, whether there is a steel lining and so on.
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