10-Level Anti-Theft Door Purchasing Guide

Please throw away the “paper”-like Security Doors at home. Here is a guide to purchasing 10-level security doors.
The security door, also called the entrance door, is the first door into your home. This door proves that you have a safe and secure home. Do you know enough about this door that gives people a sense of security?

How to choose a security door? Do you want to be stylish? How much is the right amount to spend? What features should I look for when buying it? Today I will use this article to popularize some knowledge on choosing security doors (entry doors).

1. National standards for security doors

When we go to the mall and decide to buy an anti-theft door, most of it is because of its appearance. However, when choosing an anti-theft door, in addition to its appearance, we must also understand the national standard requirements. The following requirements are all from GB17565-2007 "General Technical Conditions for Anti-theft Security Doors".

Look at the level:
Anti-theft doors on the market are classified into four grades: A, B, C and D. The most commonly used are grade A and grade D. It is recommended to buy grade A anti-theft doors for home decoration.

Look at the thickness:
The thickness mainly depends on two points. The first is the thickness of the door frame steel plate. Grade A and B are 2.0mm, grade C is 1.8mm, and grade D is 1.5mm. The second is the thickness of the door leaf steel plate. Grade A and B are 1.0mm, grade C is 0.8mm, and grade D is 0.8-0.6mm.

Look at the lock point:
Refers to the number of locking points on the door, 12 for Class A, 10 for Class B, 8 for Class C, and 6 for Class D. 12 in Class A refers to at least 12. Some with higher anti-theft levels include sky and earth locks, hinge locks, etc.

Anti-vandalism:
Anti-vandalism mainly refers to the time for violent destruction of anti-theft doors. Different levels of anti-theft doors have different violent anti-theft times. Level A is greater than or equal to 30 minutes, level B is greater than or equal to 15 minutes, level C is greater than or equal to 10 minutes, and level D is greater than or equal to 10 minutes. Level is greater than or equal to 6 minutes. Visually destroying a Class A security door is also an inhumanly physical task.
Of course, most products meet the rigid national standards, and more attention should be paid to some details.

2. Filling in anti-theft doors

It can also be understood from the above national standard requirements that it only requires the surface of the door frame and the surface of the door leaf. The inside of the door is actually hollow and needs to be filled with filler to provide sound insulation and warmth. Let’s take a look at the pros and cons of the most common filling materials:

Rockwool:
Rock wool is widely used in door fillings and has impact resistance, thermal insulation, sound insulation, and moisture resistance. It has advantages such as affordable price, but the disadvantage is that it cannot be directly installed on outdoor security doors, and it is easy to deteriorate and rot when exposed to the sun and rain.

Paper Honeycomb:
Honeycomb paper is made based on the principle of honeycomb structure in nature. It uses glue bonding to connect corrugated paper into countless hollow three-dimensional regular hexagons to form an integral stress-bearing part - the paper core, and glue the top paper on both sides. It is a new type of environmentally friendly and energy-saving sandwich structure material with low cost. The disadvantage is that it cannot be used for outdoor security doors. Over time and in humid weather, the paper honeycomb will slowly be corroded, affecting the door's sound insulation, warmth and other effects.

Polyurethane foam:
It is a foaming agent. This kind of substance was used on refrigerator doors in the past to provide insulation effect and the cost is relatively low. It is a new type of material placed in a security door. It is a foaming agent after molding and can have a very good sound insulation effect. However, it cannot be used directly for outdoor security doors as it is easy to corrode and fall off.

Aviation aluminum foil:
The corrosion resistance and sound insulation effect of aviation aluminum foil filler are much better than the first three. It can be directly used for outdoor security doors, such as the villa doors of wealthy people. In addition, when purchasing anti-theft doors, there is a way to distinguish the internal fillers. When pressing the door leaf of aviation aluminum foil, you can hear the sound of aluminum foil squeezing, while paper honeycomb and rock wool will not make any sound when pressed.

3. Paint treatment of security doors

The paint treatment of security doors is also very important. It determines the environment in which it can be used. Let me share several common paint techniques so that you can be well aware of it when choosing a door.

Transfer:
We will see that there are many beautiful wood grains on security doors, which are actually covered with a very thin layer of skin, that is, transfer paper. Paint after pasting the transfer paper. The transfer security door cannot be used outdoors and is only suitable for anti-theft doors in the passage. Too harsh an environment will cause the transfer paper on the door leaf to fade, eventually exposing the steel plate. If the steel plate is exposed for a long time, it will cause damage. rust.

Plastic spraying:
It is a kind of electro-precision powder spraying process, which is a decorative technology for metal surface treatment that has been widely used in the world since the 1980s. The advantages are energy saving, high efficiency and bright color. The same disadvantage is that it cannot be used for outdoor security doors. Exposure to sunlight and moisture will cause the door leaf to change color.

Fluorocarbon paint:
Fluorocarbon paint was first used on the exterior facades of windows. It has strong oxidation resistance and does not fade. Most anti-theft doors made with fluorocarbon paint are solid colors and have a grainy feel to the touch. They can be used outdoors. But you must be able to tell that not all solid color paints are fluorocarbon paints. Fluorocarbon paint anti-theft doors are very fashionable and suitable for both indoor and outdoor use. They are highly recommended.

Imitation copper paint:
The imitation copper paint looks like a brushed metal texture, which is retro and high-end, has some imitation copper effects, and feels silky to the touch. Imitation copper paint can be used for outdoor security doors. It is very anti-corrosion, moisture-proof, high-temperature resistant and does not fade. Most villa security doors choose this type of paint effect.

4. Differentiation of lower grades

The colloquial meaning of the lower gear is "threshold". People have to step on it when they get home, and they also suffer the impact of heavy objects being dragged in and out. This area is considered to be borne by one person silently. How to choose a security door threshold to withstand the storms of life?

Single layer lower gear:
Refers to the sill part, we use a single-layer 304 stainless steel sill. The single-layer lower bracket will have obvious welding points and paint surface, which is not refined and beautiful enough. Why does this happen? The main reason is that the single-layer lower bracket is painted after being welded to the door frame, so there will inevitably be some spillage.

Double lower gear:
The double-layer lower gear is made of a single layer and then covered with a layer of 304 stainless steel to improve its strength and beauty. However, the double-layer lower gear can only be the original silver color of 304 and cannot be painted in any way. .
The two designs recommend a double-layer lower gear. Although the single-layer lower gear can be painted and is more beautiful in the early stage, it also has great disadvantages;
First, the threshold is the place with the greatest chance of being bumped. The paint is easily rubbed or bumped off. After the paint comes off, the entrance door will be very unsightly;
Second, the single-layer lower gear is also much weaker in terms of impact resistance. For example, if it is touched by moving furniture or heavy objects, it will be easily deformed and the texture will be greatly reduced.

5. Hinge anti-theft function

Hinge is the connecting hardware that fixes the door and the door frame. The reason why I talk about it here is that there is a very interesting phenomenon, that is, the brand tried to add various lock cylinders to prevent the door from being unlocked, but later found a very crude one. The operation is that the thief does not pick the lock directly, but saws off the hinge edge on the other side, making it impossible to prevent it!
Therefore, the hinge must also have an anti-theft function in the end. The keyhole is designed in the hinge of the anti-theft door. After sawing off, there is no way to open the door. You must pay attention when purchasing.

6. Light and dark hinge selection

The hinges that can be seen by people standing indoors and outdoors are called exposed hinges, and the hinges that cannot be seen indoors and outdoors are called hidden hinges. What is the difference between these two hinges?

Exposed hinge:
For security doors, exposed hinges are more recommended. Because the anti-theft door is not restricted by angle when opening and closing, it is more convenient to use. There is no angle limit that will cause damage to the hinge, reducing the need for after-sales service.

Concealed hinge:
Concealed hinges have good looks and high prices. There are some disadvantages. When the concealed hinge opens and closes at about 90 degrees, the door cannot be opened anymore. However, due to the inertia or manual force of the door opening and closing, if the angle exceeds 90 degrees, the hinge will be easily damaged, and the security door will produce abnormal noise in the future.
This abnormal sound is due to the fact that many hidden hinges are not in a straight line, and the door clicks when it is opened and closed. Once this happens, you need to ask a master to come and adjust it. However, due to the limit of opening and closing degrees, the same problem will still occur later.

7. Main lock body

Although anti-theft doors have keyhole requirements for Class A, the main lock body plays a decisive anti-theft role. The main lock body is equivalent to the heart of the door. If its quality is not up to standard, there will be safety hazards.

Material:
As for the material of the main lock body, what is more reassuring is that it is made of solid 304 stainless steel. Some people may ask, how to judge whether the main lock is 304 stainless steel when buying it? No need to worry, it is made of solid 304 stainless steel and has a logo written on the main lock body, which is very conspicuous. Of course, there is also a type of lock that looks a lot like stainless steel, but is actually made of zinc alloy. Comparing the two, the zinc alloy is brighter.

Domestic:
The domestic main lock body is generally called the "Big King" lock body, and the standard size is 388mm*40mm. The size of the main lock body determines whether the anti-theft door can be installed with side locks (opening side) and top and bottom locks (top and bottom of the door). Remember this size.

Import:
I would like to make a special case of imported main lock bodies. For the fingerprint locks of two imported brands, Samsung and Yale, the main lock body is only 24 centimeters long. If you choose this type of main lock body, it will not be able to drive the side locks and the heaven and earth locks, which will occur during installation. Remove this part of the functionality. When many finely decorated houses are delivered, the anti-theft doors only have the main lock function.

8. Security door technology

What processes are used in the production of security doors? First of all, we need to understand what parts a security door consists of, mainly door frame + door panel. The door frame basically does not have many tricks, and the door panel takes on the important task of appearance.

Fine carving:
Usually, the entire surface of 1-3 cm thick aluminum plate is used to shape the anti-theft door pattern. The advantage of using finely tuned aluminum plates for engraving is that the length and width can be adapted and adjusted, and the pattern size can also be scaled proportionally, making the entire door more harmonious and the engraving effect more refined and rich.

Pouring:
The same aluminum alloy material is used. A simple understanding is to use a fixed mold to perform a pouring process on the anti-theft door aluminum plate, and finally achieve the modeling effect. Compared with fine carving, the shape of cast aluminum cannot be scaled proportionally. If the height and width of the door change, the shape will still be a fixed size, which is not flexible and the beauty will be greatly reduced.

Molded:
The molding process is carried out on the security door with a fixed mold size to achieve the modeling effect. The pattern shape and size cannot be scaled. This type of process is suitable for standard size security doors and can be produced in large quantities quickly.

Splicing:
It means that the shapes on the door panels are spliced ​​together. This method is relatively more selective. When the size of the door changes, the shape can also be adjusted, which is more flexible and is similar to the concept of fine carving.
After knowing the process, it will help us choose the security door. If the door at home is of standard size, pouring and molding process will be enough. If it is a custom-sized door, fine carving and splicing are more suitable.

9. Price

Different materials and different processes have different prices. From the standards of normal Class A security doors, some price references are also given. Steel Class A security doors, the price of a single leaf is 3000-4000, which is basically sufficient for daily life (excluding fingerprint locks). Aluminum Class A security doors, the price of a single leaf 7,000-8,000 yuan (excluding fingerprint lock).
This price does not include villa doors, customized double and double doors, special craft doors, etc. As for whether to spend this price to buy a security door, it is a matter of wisdom and benevolence.
It is completely necessary from the perspective of safety, and it is also necessary from the perspective of practicality and quality, but it is not cost-effective in the short term (if it is used for ten years, it is still very cost-effective).

10. Fingerprint lock

Fingerprint locks are a companion to anti-theft doors. They can greatly improve the appearance of the door and add a sense of technology. They are also introduced here for reference when purchasing. Common fingerprint locks on the market can be divided into fully automatic and semi-automatic. The functions are four-in-one (fingerprint, password, card, key), five-in-one adds mobile phone remote control to the four-in-one, and six-in-one adds face recognition to the five-in-one.

Fully automatic:
Fully automatic fingerprint locks generally do not design a horizontal handle. After entering the fingerprint, the door lock automatically opens. When the door is closed, the door lock is automatically locked after entering the fingerprint. This type of lock generally consumes more power and is equipped with a lithium battery and a spare USB charging port.

Semi-automatic:
For semi-automatic fingerprint locks, a horizontal handle is designed on the door lock. After entering the fingerprint, press the handle downward and the door lock will be fully opened. After closing the door, lift the handle upward and the door lock will be fully closed. This type of lock consumes no power, just uses dry batteries, and will be equipped with a USB charging port.

Suggestions for purchasing these two types of locks: We recommend a five-in-one model in terms of functionality. You can use your mobile phone to view door opening records, anti-pry alarms, and continuous error alarms. For example, if you have elderly children at home, you can also use your mobile phone to check whether the children arrived at home on time to unlock the door, etc.
In terms of aesthetics, fully automatic is better. From the characteristics of domestic anti-theft doors, it is recommended to equip them with semi-automatic fingerprint locks. In terms of durability, the semi-automatic fingerprint lock is a mechanical unlocking design, which is more durable than motor-driven unlocking.

There is another tip that I would like to share with you when choosing a lock. Most anti-theft door brands on the market do not make fingerprint locks. If the door and lock are of the same brand, the lock will undoubtedly be OEM. Just choose a reliable door brand + a reliable lock brand. No need. Aim for consistency.

Let’s mention cat eyes separately. In my impression, traditional cat eyes are installed on door panels. In the past few years, there have been incidents of “cat eye unlocking” being stolen. In response to this problem, a visual cat's eye lock was designed. There will no longer be a cat's eye hole on the door panel, and the external situation can be displayed directly on the lock. Relatively advanced security doors will not have a cat's eye design.

After reading this, do you have a deeper understanding of security doors? I believe you will not be fooled when choosing a security door. Finally, a comfortable house is indispensable for every small detail. For more questions about security doors, you can leave a message to discuss together.