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1. During the renovation, because the window removal process will damage the interior and exterior walls, it is better to replace the doors and windows first, and then proceed to the next step of renovation. The owner should clearly choose which brand of profile? Profile products will determine the level of the entire doors and windows, sealing and aging and other issues, buyers should not be the market's "low prices plastic steel doors and windows" fuzzy concept of blinding.
2. When purchasing, it is necessary to go to the formal building materials market. The roadside stalls have a simple processing equipment and the accuracy and strength cannot be guaranteed at all. In particular, plastic steel doors and windows, they do the poor quality of steel doors and windows lining steel, even without lining steel, other parts are also very poor.
3, the appearance of plastic doors and windows should be blue and white. The color is too pale or gray, indicating that the stable ingredients in the material are not enough.
4. Check if the hardware is flexible and smooth.
5. The sliding window of the window frame should have aluminum slides to facilitate its replacement.
6. The sealing strip of the casement window should be freely replaceable because the sealing strip has a shorter life than the form.
7. There should be a fixed piece in the middle of the sealed top of the sliding window sash. This is the key to the sealing performance of the sliding window.
8. During the installation process, the horizontal and vertical alignment of doors and windows should be supervised. The styrofoam is used for filling between the window frame and the wall, and the inside and the outside of the window frame must be sealed with silicon copper glue or sealant to prevent water seepage. After installation, the protective film must be removed, otherwise it will reduce the service life of doors and windows.
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Dimension: 4mm-160mm - 0.20mm
Squares/Rectangles:1mm-165mm
Thickness:0.5mm-4mm
Wavelength range:190nm to 4.5um
Thickness tolerance:+/-0.01mm-0.1mm
Edges:Fine
Ground Flatness:Up to Lambda/10
Surface quantity: 80/50-20/10 Scratch/Dig
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