1 . The fireproof performance of aluminum alloy windows is better than plastic steel, without coating and maintenance, long-term and new type, eliminating your maintenance fatigue and trouble, high comprehensive cost performance and long service life.
Disadvantages: the toughness is not crisp, the tone is cold, the heat preservation effect is poor, the sound insulation is poor, the air tightness is poor, the air leakage is not easy to handle, and the surface is easy to change color. The level is lower, and the average home decoration is more.
2 . Since copper window is welded, the air tightness of the frame is slightly better than that of the thread aluminium windows. The sound insulation effect is better than aluminum alloy, and the heat insulation performance of plastic steel windows is better than aluminium windows.
Disadvantages: The intensity is not very good, it is easy to change, and it will change the color and age in a few years. Due to the cross section, the waterproof performance is not good. The water in the inner layer cannot be discharged. Especially in winter, outdoor heat is easy to accumulate water. If the installer is not careful, the water will be handled by himself. By analyzing the performance examples of 425 batches of plastic-steel windows sent by Shanghai enterprises at the end of 1998, it is pointed out that "high-rise buildings should be used with caution instrument frame. The grade is relatively low, and the average family decoration is used more.
3 . The sealing effect is good, the sound insulation effect is good, the wind pressure resistance is good, the rainproof air permeability is good, and the durability grade is good. Frameless balcony has various properties, but it has good lighting performance, good ventilation effect and beautiful appearance.
The structure of broken bridge aluminum profile is different from that of aluminum alloy and plastic steel. The profile is disconnected in the middle to block the heat conduction channel, and the sound insulation effect is better than that of aluminum alloy and plastic steel. This is also the most important design. This is a significant progress in the form of external windows, ensuring the energy saving of buildings. For the energy efficiency of residential buildings, this is the main measure of the country.
Disadvantages: There are basically no disadvantages, and sometimes there is less water seepage. The price is in the middle and belongs to the [popular] type.
