Entrance door
How to choose a suitable entrance door? We will provide you with reference from the following aspects
Material of door panel
1. Stainless steel door
■Advantages: Durable and sturdy anti-theft performance, good sound insulation, good corrosion resistance, good texture, long-lasting bright color, never rust.
Disadvantages: Low cost performance, more traditional style, mostly silver-white, somewhat monotonous appearance and color, making people feel more rigid.
2. Zinc alloy door
■Advantages: Good sound insulation, easy plasticity, good corrosion resistance, not easy to rust, because the zinc alloy forms a layer of passivation on the surface for protection. High density, very textured for daily use. Good decorative effect, bright colors to meet different styles and needs, long life, up to about 15 years.
■Disadvantages: Low melting point, melts at 385℃, easy to cast. Low creep strength, prone to spontaneous combustion and deformation, easy to age, zinc, hafnium, gold dissolution will decrease with temperature.
3. Cast aluminum door
■Advantages: high-end appearance, novel and beautiful shape, customizable, short production cycle, one-time integral casting, various styles, low maintenance cost, flame retardant, stain resistant, oxidation resistant, corrosion resistant, daily maintenance only needs to be wiped clean with a wet rag.
■Disadvantages: higher price, lower than copper door, higher than stainless steel door. In order to improve the various performances of cast aluminum doors, the production process is more complicated.
4. Copper door
■Advantages: The copper pattern is clear and atmospheric, the overall look is coordinated and has a good three-dimensional sense; it is not easy to bend and deform, corrosion resistant, high density, good sound insulation effect; strong anti-theft performance, with advanced anti-theft locks, safety bolts, etc., and the lock core cannot be seen outside the door, and it is equipped with a built-in lock.
■Disadvantages: low cost performance, expensive price, easy to leave scars when bumped.
Fillings in the door
1. Honeycomb paper
Honeycomb paper is a material shape learned by humans from sealed hexagonal honeycombs based on the inspiration of bionics. It has very good mechanical properties and is a common filler in the door industry around the world.
■Advantages: Cheap material, light weight, high strength, smooth surface, not easy to deform, good sound insulation, no pollution, in line with modern environmental protection trends.
■Disadvantages: In humid weather, paper bees will slowly corrode, affecting the sound insulation and warmth of the door.
2. Aviation aluminum foil
In fact, it is a honeycomb-shaped aluminum foil. Aluminum foil also has good and bad, some are thicker, and some are thinner. The way to verify it is to press it inward with your palm. If it can make a slightly louder sound, it is aviation aluminum foil.
■Advantages: It has strong corrosion resistance and aging resistance, no cracking, and no blistering. Flame retardant insulation, sound insulation, and shockproof effects are all good. Non-toxic and harmless, the most environmentally friendly.
■Disadvantages: Poor gluing will produce noise, and the price is high.
3. Polyurethane foaming
Some of the internal structures are arranged horizontally and vertically with very dense keels, and some are covered with steel wire mesh throughout the internal space, and then the gap is punched into it with a foaming machine. After a period of time, it will expand completely. Therefore, the overall weight of the door is heavier and the strength is higher. Since the combined polyether uses water as a foaming agent, it is green, safe and environmentally friendly.
■Advantages: good sealing, good heat preservation and sound insulation, high temperature resistance above 200℃, and very long service life.
■Disadvantages: poor flame retardancy, flammable at high temperature, and toxic gases will be produced
4. Rock wool
It is made by melting into fibers at high temperature, adding an appropriate amount of binder, and curing.
Advantages: It has impact resistance, heat preservation, heat insulation, sound insulation, moisture resistance, and affordable price.
■Disadvantages: The cost performance is not high and the price is expensive. It cannot be directly used for air-conditioned security doors, which are prone to quality deterioration and rot.
Main lock body and hinge of the entrance door
1. Main lock body
The material of the main lock body is all solid 304 stainless steel. The all-solid 304 stainless steel material is marked and written on the main lock body, which is very conspicuous.
2. Hinge
It is the connecting hardware that fixes the door to the door frame.
(1) Anti-theft hinge
The door hinge has a keyhole design. Even if the hinge is cut off, the door cannot be opened. Be sure to pay attention when purchasing.
(2) Visible hinge
The door is not restricted by angle when opening and closing, which makes it more convenient to use. There is no angle restriction that may cause damage to the hinge, reducing unnecessary after-sales service.
(3) Concealed hinge
It has a high appearance and a high price, but there are some disadvantages. The door cannot be opened after opening and closing at about 90°. However, because the door has inertia or human force when opening and closing, if it exceeds 90°, the hinge is easily damaged, and the anti-theft door will produce abnormal noise in the later stage.
Key points for choosing entrance doors
1. Check the anti-theft level
Each entrance door has a nationally certified anti-theft level stamp, which is divided into four levels: A, B, C, and D. Only A is recommended. The level stamp is generally printed on the inner door hinge.
2. Check the lock core level
The security level of the lock core is divided into A, B, and C according to national standards. C-class lock core is the best, as follows:
(1) A-class lock core, 21 minutes of technical opening prevention, 10 minutes of anti-drilling, 5 minutes of anti-saw, 210 minutes of anti-prying, 10 minutes of anti-pulling, 10 minutes of anti-impact
(2) B-class lock core, 25 minutes of technical opening prevention, 215 minutes of anti-drilling, 5 minutes of anti-saw, 15 minutes of anti-prying, 15 minutes of anti-pulling, 215 minutes of anti-impact
(3) C-class lock core, 210 minutes of technical opening prevention, 230 minutes of anti-drilling, 30 minutes of anti-saw, 230 minutes of anti-pulling, 30 minutes of anti-impact
3. Look at the sound insulation performance
The sound insulation must be good, at least people outside cannot hear when talking in the entrance.
Key points for choosing an entrance door
1. Check the anti-theft level
Each entrance door has a nationally certified anti-theft level stamp, which is divided into four levels: A, B, C, and D. Only A is recommended. The level stamp is generally printed on the side of the inner door.
2. Check the lock core level
The security level of the lock core is divided into A, B, and C according to national standards. C-class lock core is the best, as follows:
(1) A-class lock core, 21 minutes of technical opening prevention, 10 minutes of anti-drilling, 5 minutes of anti-saw, 210 minutes of anti-prying, 10 minutes of anti-pulling, 10 minutes of anti-impact
(2) B-class lock core, 25 minutes of technical opening prevention, 215 minutes of anti-drilling, 5 minutes of anti-saw, 15 minutes of anti-prying, 15 minutes of anti-pulling, 215 minutes of anti-impact
(3) C-class lock core, 210 minutes of technical opening prevention, 230 minutes of anti-drilling, 30 minutes of anti-saw, 230 minutes of anti-pulling, 30 minutes of anti-impact
3. Sound insulation performance
Sound insulation must be good, at least people outside cannot hear when talking in the entrance.
4. Material thickness
The material can be galvanized plate, real copper plate, copper-plated plate, cast aluminum plate, which is more beautiful while preventing theft. The thickness of the metal material of the door panel and door frame is more than 2mm (thickness of steel, copper, alloy plate), the thickness of the door body is more than 20mm (50-90mm for high-end entrance doors), the thickness of the door leaf hinge is more than 1mm and the length is more than 90mm.
5. Fireproof performance
The fireproof performance of the entrance door is also very important. Choose a qualified fireproof door and carefully check its fireproof level, fireproof time, material quality and other indicators to ensure that the fireproof performance of the door meets the relevant local standards.
6. Anti-theft performance
The anti-theft performance of the entrance door is also a top priority. You should choose a door with an independent lock core anti-pry function and thickened steel plate and other anti-theft designs to improve the safety and resistance of the door.
7. Material selection
The material of the entrance door should be strong and durable, with functions such as fireproof, anti-theft and sound insulation. At present, the main materials for entrance doors on the market are solid wood doors, steel doors, color steel doors, aluminum alloy doors, etc., which are suitable for different needs and decoration styles.
Notes on replacing the entrance door
1. Decide whether to replace the entrance door at the beginning of the renovation of the new house, because the entrance door should be replaced before the tiler enters the site to lay tiles, otherwise there will be paint and brick repairs, and in serious cases, the wall may be repaired.
2. Pay attention to the direction of the door opening during installation. The main door opens outward to save more space, but if there are two elevators and four households with a middle household, if the main door opens to the aisle, it must be opened inward, otherwise the door will block the fire escape. Therefore, when installing, you must pay attention to the direction of the door opening, otherwise it will be installed upside down and the property will require reinstallation.
3. When installing the entrance door, cement mortar should be poured, which is stronger and more soundproof than foaming agent.
4. If the appearance is affected after installation, it can be beautified with felt or PVC stickers.
Summary
1. Buy Class A + anti-theft doors with FAM logo
Anti-theft levels are divided into Class A, Class B, Class C, and Class D safety factors: Class A> Class B> Class C and Class D. The steel stamp of Class A is on both sides of the door frame, about 1.6 meters above the ground.
2. Buy door panels with a thickness of no less than 9cm
A good anti-theft door has a thickness of no less than 9cm, with thickened sealing strips on the front and sides, and good sealing effect. The door is silent when opening and closing, and it will not disturb the sleepers when you go back late at night.
3. Buy C-level lock cylinders, not AB-level lock cylinders. The quality of the anti-theft door depends on the lock cylinder. The safety factor of the lock cylinder is: C>B>A. If you choose a C-level anti-theft lock cylinder, the thief will be helpless if he can't pry it open for 4 hours.
4. Buy a door with aviation aluminum foil filling
Anti-theft doors with aviation aluminum foil filling layers are soundproof, heat-insulating and heat-insulating. Anti-theft doors filled with honeycomb cardboard are inferior products, not heat-insulating, not sound-insulating, and not environmentally friendly.
5. Buy hinges with anti-theft points, no less than 3
There must be anti-theft points, that is, there are raised screws on the hinges and corresponding holes on the door frame. These are anti-theft points, which have good anti-theft effect and are safer.
6. Buy double-layer galvanized steel plate material. Choose double-layer galvanized steel plate with fireproof cotton. Knock it with your hand to listen to whether the sound is steady and powerful. In addition, the door should be wrapped with sealing strips to reduce shock and sound insulation, and keep warm and dustproof.
7. Install a camera, don't buy one with a cat's eye. Now thieves will use the cat's eye to unlock and break into the house, including the locksmith who can open the door for you in one minute through the cat's eye.
8. Buy a door with more locking points. The locking points refer to the number of locking points on the door. Class A has 12, Class B has 10, Class C has 8, and Class D has 6. Class A has 12, which means at least 12, and some have a higher anti-theft level. The number and location of locking points. Class A entrance doors have more than 12 locking points.