First observe its surface; The quality is relatively good Broken Bridge aluminum doors and windows the surface is smooth and textured, and the color of the surface is also very uniform and smooth. However, the thickness of high-quality broken bridge doors and windows on the materials conforms to the national regulations, and its thickness can be measured at the time of purchase, generally not less than 1.2mm. Secondly, try the doors and windows when purchasing; See whether the workmanship is fine and whether the switch is flexible. Finally, you can also choose by cutting surface; The angle of high-quality Broken Bridge aluminum doors and windows on the cutting surface will be very accurate.
Broken Bridge aluminum doors and windows the selection method is as follows:
1. The quality selection of the product surface can be judged by observing the broken bridge aluminum doors and windows surface. Generally speaking, the quality is relatively good Broken Bridge aluminum doors and windows the surface is smooth and textured, and the color of the surface is even and smooth. However, the surface of doors and windows with poor quality is rough and the color is uneven, which makes people feel very uncomfortable.
2. Looking at its materials, the thickness of high-quality broken bridge doors and windows conforms to the national regulations. Its thickness should generally not be less than 1.2mm, its anti-strong pull should be more than 157 newton per square mm, and its oxide film thickness should be more than 10 μm. If the selected broken bridge aluminum doors and windows does not reach these, do not buy it.
3. Depending on the processing, check whether the workmanship is fine, whether the switch is flexible, and whether the sealing performance is good or not. Generally, inferior doors and windows are made of aluminum profiles. It is not only rough in workmanship, but also inflexible in switch, which often causes air leakage and rain leakage. While the quality is broken bridge aluminum doors and windows, the quality of its processing is needless to say. Finely processed. Good sealing performance and easy switch. Therefore, when purchasing, we should choose broken bridge aluminum doors and windows with reliable processing quality.
4. Look at the cutting surface, the quality is broken bridge aluminum doors and windows, the angle on the cutting surface is accurate, and the phenomenon of bending and twisting will not occur. However, the section of broken bridge aluminum doors and windows with poor quality is not so regular.
5. Depending on the price, generally, the production cost of broken bridge aluminum doors and windows with good quality is relatively high, and the price is much higher than that of broken bridge aluminum doors and windows with inferior quality. Therefore, we recommend that you purchase broken bridge aluminum doors and windows sold by regular manufacturers.
I. Profiles
1. Profile wall thickness
In the national standard, the basic wall thickness of ordinary aluminum alloy doors and windows is between 1.2 and 1.4mm, and the wall thickness of broken bridge aluminum windows must be above 1.4mm. However, the wall thickness of some fake and inferior products in the market is likely to not reach the standard of ordinary aluminum alloy doors and windows.
2. Heat insulation strip
Sealing and heat insulation focus on broken bridges! Heat insulation strip is the "bridge" of the broken bridge window "!
Broken Bridge Aluminum is also called heat insulation broken bridge aluminum, which is to disconnect the aluminum alloy from the middle and connect it with heat insulation strips to effectively prevent the conduction of heat.
Therefore, the quality of heat insulation strip directly affects the sealing effect of broken bridge aluminum doors and windows.
PA66 nylon insulation strip must be used for broken bridge aluminum doors and windows insulation strip, which is stipulated by national standards, not PVC plastic strip. PVC strip luminous and shiny, but the surface is not smooth; The surface of the real nylon strip is smooth and symmetrical.
Once the heat insulation strip is deformed, it will not be tightly connected with the aluminum alloy profile, which will affect the sealing effect of the window. PVC heat insulation strip is easily deformed due to the influence of heat expansion and cold contraction; Nylon strip is characterized by firmness, firmness and stronger stability, it is not easy to deform.
Ordinary PVC insulation strips are generally about 6000 to 7000 tons, while PA66 nylon insulation strips are up to 28000 yuan per ton, which is why the price of doors and windows with the same appearance is much worse.
2. Glass
The high-end broken bridge aluminum doors and windows of the big factory brand is basically equipped with safe double-layer tempered insulation glass. The sealing and sound insulation effects are excellent, and the safety performance is also reassuring.
Other types of glass include non-tempered hollow, single-sided tempered hollow, etc. The price difference among them can't be seen from the eyes of flesh. Some window glass is only dozens of pieces per square meter, while some glass is hundreds per square meter. In this way, the overall price difference of the window will appear.
Hollow glass with poor quality has poor sealing performance, which leads to water vapor entering the middle layer and forming fog on the glass, which not only affects the appearance, but also indicates that the air tightness and water tightness are obviously insufficient. Living in the same area, under the same environment, the doors and windows with good sealing performance can ensure that the home is warm in winter and cool in summer, isolating the noisy car sounds, human voices and square dances from the outside world, while the inferior doors and windows make the family suffer!
III. Accessories
1. Hardware
Door and window hardware is most likely to be tampered with by some bad merchants.
Good hardware is usually made of copper, stainless steel or zinc alloy with high strength, not easy to deform, good corrosion resistance, stronger weight capacity and good stability.
However, the poor hardware is mostly made of ordinary metal materials, such as aluminum alloy and other materials with soft metal properties, which are easy to deform, break and hardware handle thin in Wall.
In terms of beauty and durability, good hardware needs to be polished, polished and electroplated, with finer surface treatment, acid alkali resistance corrosion resistance, smooth surface and easy cleaning. Poor hardware is easy to scratch the paint surface and fall off, easy to wear.
The cost of a set of inferior hardware may be less than 100, and the cost of good hardware may be as high as hundreds of sets. If it is imported hardware, the price is higher.
2. Sealant
On the market, sealant is mixed, there are 2 or 3 yuan per bottle, there are dozens of bottles and even dozens of 11 bottles. The cost of installing doors and windows varies depending on your choice.
Silicon sealant is acidic and neutral. Doors and windows generally choose neutral silicon sealant, which can prevent mildew and weather (high temperature resistance, low temperature).
Good sealant is environmentally friendly and tasteless, no stimulation, no harm to human health, inferior silicon sealant strong stimulation taste, unknown ingredients, is a major source of indoor pollution!
IV. Craft
The products of big factories and small workshops are not inferior in workmanship. Even if a small workshop looks like a cottage on the outside, it cannot compare all the performances of doors and windows with genuine goods brand doors and windows.
In the design of doors and windows, professional designers design not only the appearance, but also the doors and windows that are more suitable for practical use and can optimize the use value. Among them, how to make the sealing performance of doors and windows better, how to make the service life of doors and windows longer, small workshops can imitate the appearance but cannot imitate the real design.
In terms of the accuracy of cutting doors and windows, the equipment accuracy of small workshops is poor, the doors and windows produced are uneven, and they cannot fit with the wall surface during installation.
V. Service life
Good quality door and window system can guarantee the service life of several decades, while inferior doors and windows will have various hidden dangers and problems after several years of use and must be replaced. For example, the doors and windows bought at 400/㎡ are completely lower than the market price. It is possible to replace them in 5 years. The cost of replacing them again and again is higher than that of buying high quality doors and windows at a time!
