At present, the mainstream doors and windows on the market mainly include plastic steel windows, broken bridge aluminum windows, and aluminum-clad wooden windows. Among them, the price of plastic-steel windows is relatively low, but its performance is average and it is easy to age and deform; aluminum-clad wooden windows are relatively high-end, with the highest performance, but the price is relatively high; Between wooden windows, its performance is very good and the price is moderate, so it is considered the mainstream of the current mainstream doors and windows.

So, how to correctly purchase aluminum windows with broken bridges? Many people have many misunderstandings when purchasing because they don't know enough about aluminum windows with broken bridges.

In fact, the aluminum profile is not the thicker the better, the material of the profile and the structure of the cavity are also very important aspects.

Aluminum profiles are divided into primary aluminum and recycled aluminum. Primary aluminum is refined and processed from aluminum ore, and recycled aluminum is re-smelted from recycled waste aluminum products. Compared with the two, primary aluminum must be better, and recycled aluminum is slightly worse. , but it is also a civil aluminum material that is allowed and encouraged by the state. As for how to distinguish between primary aluminum and recycled aluminum, the simple way is to look at the cut surface. , The color is silvery white.

There is also the type of aluminum alloy. At present, the better material for door and window profiles is 6063 aluminum alloy, such as 6063-T5 and 6063-T66. This aluminum alloy has better hardness and toughness, so it is a general-purpose aluminum alloy for high-end profiles. .

The national standard requirement for the wall thickness of door and window profiles is more than 1.4mm. Household doors and windows on the market are generally 1.4~2.0mm, and some commercial door or curtain wall profiles may reach 3.0. The performance of the profile depends not only on the wall thickness and material, but also on its cavity structure. For example, the multi-cavity structure is better than the single-cavity structure. Of course, if the same material has the same structure, the thicker one is better, but the cost will be higher.

In short, to distinguish the quality of profiles, not only depends on the wall thickness, but also depends on the material and structure.

The current system windows are equipped with insulating glass as standard, there are double-layer hollow glass and three-layer hollow glass, and the high-end configuration is 5mm toughened glass for each layer. Triple-layer insulating glass is generally used more in the north, and it is better in heat and sound insulation than double-layer insulating glass. Are there more layers? There are also four layers, and laminated ones, but the commonly used ones are double-layer and three-layer. The more layers of glass, there will be some disadvantages. For example, the increase in weight will bring more pressure to the frame and cause the frame to deform. Especially in the south, windows that open outwards are preferred. The heavier the glass, the greater the damage to the hardware, which brings safety hazards. ;In addition, increasing the number of layers will also reduce the overall light transmittance of the glass, and there will be a certain degree of deformation after the glass is tempered. The more layers, the easier it is to be distorted; another point is that the more layers, the higher the cost. Therefore, two or three layers of glass are enough, and there is no need for too much, unless there are special requirements, such as special sound insulation or explosion-proof requirements.

Many door and window sellers will recommend lowe glass. Lowe glass itself is a good thing. It is an energy-saving glass technology that can improve glass heat insulation, block ultraviolet rays, and provide privacy. But it is not suitable for all occasions. First of all, it may not be suitable for families with flowers, because the photosynthesis of some plants will be affected due to less ultraviolet radiation; in addition, the light transmittance of lowe glass is about 10% lower than that of ordinary glass. If it is a small apartment, the light itself is not good, so this kind of glass is not suitable.

Many people like big glass and think it has a good view, which is true, but big glass also has disadvantages.

First of all, the larger the glass block, the relatively less window frame material, and the lower the structural strength of the entire window.

Secondly, the larger the glass block, the worse the wind pressure resistance, especially in high-rise or river-view rooms and sea-view rooms, strong winds will make the glass vibrate and even generate resonance and noise.

Again, the larger the glass block, the higher the thickness requirements for the single glass, and the higher the cost. Generally, the single glass is more than 3 square meters, 6mm glass is used, and the single glass is more than 4 square meters, 8mm glass is used, and so on.

The number of sealing layers refers to how many layers of sealing structures there are between the door and window frames. Standard system doors and windows are generally three to five layers of sealing. However, in order to attract attention, some manufacturers make the sealing strips into many layers, and then say that they have many layers of sealing, such as eight layers, ten layers or even a dozen layers. In fact, this is a gimmick, and sometimes too many layers lead to many The adhesive strips are connected together, so that once a problem occurs in a certain layer, other layers may fail together, which reduces the overall sealing performance.

In fact, to judge whether the sealing of doors and windows is good or not depends not only on how many layers but also on the material of the sealing strip. The better sealing strip material is EPDM rubber strip, which is an automotive-grade rubber strip. Now the high-end EPDM rubber strip also has EPDM soft and hard co-extruded rubber strips. This kind of rubber strip has good elasticity and is not easy to age , looks bright and tidy and has no peculiar smell; and those adhesive strips that look oily and smell heavy and pungent are generally poor-quality adhesive strips, and such adhesive strips are useless no matter how many sealing layers they have.

The reason why the broken bridge aluminum is called this name is because a kind of heat insulation strip is used in the middle of the profile to form a broken bridge structure, which prevents heat transfer, so it is called broken bridge aluminum.

So is the wider the heat insulation strip the better? No! If the heat insulation strip is too wide, the aluminum may be smaller, so the overall strength of the profile may be affected. We all know that the width of aluminum profiles for doors and windows is 60, 65, 70, 75, 80 and so on. Generally, the larger the width, the thicker the window, the better. In order to save costs, some businesses make the heat insulation strips larger and then reduce the quality of the material, which is shoddy.

The material of the heat insulation strip is divided into nylon PA66 and PVC. The performance of the nylon heat insulation strip is better than that of the PVC heat insulation strip. Therefore, when we look at the heat insulation strip, we should not only look at the size, but also look at the material.

Some people may say, do doors and windows still have a beautiful appearance? Yes, there are. The appearance of the traditional doors and windows that we are more familiar with is quite satisfactory. What we can see are the window frames, pressing lines, hardware, and glass, all of which are square. However, some manufacturers, especially some southern manufacturers, add a lot of tricks when designing doors and windows, such as adding some convex and concave lines on the window frame, or designing some European-style pressure lines. Such windows look beautiful, but their performance is not necessarily good, because there may be some gaps when the special-shaped materials are butted, resulting in air leakage and cold. In addition, it is very troublesome to disassemble some crimping lines with styling, which brings hidden dangers to later maintenance.

Hardware is the soul of doors and windows, which directly determines the opening form, sealing degree and service life of doors and windows.

The door and window hardware commonly used now includes inner flat opening hardware, outer opening hardware, and inner opening and inner pouring hardware. There are also some high-end hardware that have emerged in recent years, such as hidden inward-opening and inward-facing hardware, and smart opening hardware.

When choosing hardware, we try to choose some traditional and common hardware. Such hardware technology is relatively mature, durable and not spoiled, easy to repair and replace later, and cheap. And some newly listed high-end hardware, although it looks tall, but the technology is not mature enough, relatively delicate, troublesome to maintain and very expensive.

The above are the eight misunderstandings of broken bridge aluminum doors and windows that I have summarized. I believe that you will have a deeper understanding of broken bridge aluminum doors and windows after reading it. When you choose and buy, you can compare them one by one.You will definitely choose good doors and windows that are satisfactory and genuine.