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1. The characteristics of PVC doors and windows are PVC as the main raw material, adding stabilizers, modifiers, fillers, UV absorbers, etc., processed into various profiles with hollow sections, and the doors and windows assembled with them as materials are called Steel doors and windows.
Plastic steel doors and windows have the characteristics of high strength and impact resistance. Its weather resistance is good. Its application range is from minus 40 degrees Celsius to minus 70 degrees Celsius. It is not embrittlement and discoloration. Its service life is up to 50 years; its heat insulation Well, low thermal conductivity and energy conservation. At the same time, steel doors and windows also have excellent corrosion resistance, airtightness, watertightness, sound insulation and flame retardancy, and its electrical insulation properties are superior to other door and window materials. In addition, the plastic steel doors and windows also have the characteristics of exquisite appearance, no need of coloring, easy installation, use of lightweight, easy maintenance and other characteristics, has become the main direction of the development of doors and windows materials in the future.
Plastic steel doors and windows are the doors and windows materials that the Ministry of Construction has advocated for several years. In home renovation projects, plastic steel materials are mainly used to seal windows of balconies, apply internal layers of windows (to improve sealing), and to make bathroom frames and door frames in bathrooms. Wait.
2. Quality appraisal of plastic steel doors and windows In the home improvement project, the production of plastic steel doors and windows is generally not completed by the construction team, but by the professional manufacturer of plastic steel doors and windows after the measurement and production installation, the production process is actually the assembly process of plastic steel profiles, therefore, the plastic steel doors and windows Qualification is the qualification of the quality of the profile assembly.
The allowable dimensional deviation for the assembly of steel doors and windows is: the frame size of the window frame and the fan, the length is within 1.5 meters, the error is within 2 millimeters, the error of the diagonal length of the door and window within 1 meter is within 3 millimeters, the length of the diagonal line The error within 2 meters is within 3.5mm, the error with diagonal length greater than 2.m is within 5mm, the assembly gap between adjacent members is less than 0.4mm, and the height difference between the same plane at the weld is less than 0.6mm. The gap is less than 1.5 mm: the error of frame and fan splicing width of doors and windows is less than 1 mm, and the sash glass equal division error is less than 2 mm.
3. Installation and acceptance indicators for plastic steel doors and windows According to national standards, the quality requirements for plastic steel doors and windows after installation are: no opening welding and breakage of door and window profiles, complete hardware accessories, correct installation position, flexible use, scratches on the surface of windows and doors, Clean, no pollutants, when the doors and windows are closed, there is no obvious gap between the door and window fan and frame, the bead is closed tightly, there is no obvious gap at the joint; the door and window are open and flexible, no block, rebound and warpage phenomenon F installation error diagonal The error of the line within 2 meters is less than 3 millimeters. When the diagonal length is more than 2 meters, the error is less than 5 millimeters. The error window of the verticality is less than 2 millimeters within 2 meters and the window height is less than 3 millimeters when it is greater than 2 meters.
4. Price analysis of plastic steel doors and windows The price of plastic steel doors and windows varies according to the specifications of materials used and the manufacturers. The quotation for plastic steel doors and windows is measured in square meters. The price of materials produced by famous brand enterprises is higher than that of small enterprises. The difference is between 30% and 60%. Therefore, the price per square meter produced by a small company is between 200-240 yuan. The price of a brand-name company with the same specifications is between 260-380 yuan per square meter.
5. Maintenance of steel doors and windows Currently, the steel doors and windows on the market are mainly white, with strong decoration and easy maintenance. In particular, attention should be paid to two points in use: The first is not to use a ballpoint pen to write pictures on it, and when there is pollution, Eliminate it in time and do not apply strong chemicals on it. The second is not to scratch the surface with a knife edge. The profile of the steel profile is very smooth and it is difficult to repair after scratching.
Purchase of steel doors and windows [construction materials]