Wrong choice of anti-theft door. The abnormal noise when opening the door is really annoying. The anti-theft door is one of the security guarantees of the home. I don’t want to have anti-theft disciples in the future. Rust leaks and moisture returns, so here are 8 tips for choosing anti-theft doors! Write it down quickly!

Security door

1. Door panel material

Door panel material There are six common ones: Cast copper door, copper door, zinc-aluminum/alloy steel plate, galvanized steel plate, cold-rolled steel plate.

Preferred:Zinc (aluminum) alloy steel plate or galvanized steel plate, has high cost performance, good impact resistance, good sound insulation and heat preservation performance, and is completely sufficient for daily household use.

Zinc (aluminum) alloy steel plate

Don’t choose:Cold-rolled steel plate, especially in the humid weather in the south, is easy to rust and has a short service life.After rusting, the performance and safety of the door panel will be reduced.

Cold rolled steel

2. Door leaf thickness

Door leaf thickness selection:≥9cm, strong and durable, good sound and heat insulation,high safety, and long service life. Do not select: Under 9cm The door leaf has poor sturdiness and poor impact resistance, which affects the overall stability and safety of the door.

Thickness≥9cm

Select door panel thickness: 1mm and above, the thicker the door panel, the better the quality, and the stronger the impact resistance.

The thickness of the door frame should be selected: 2mm and above, thick door frames can be better fixed Door body, enhance the durability of the door.

Door panel thickness ≥1mm, door frame thickness ≥2mm

3. Anti-theft level

Preferred:Class A door (corresponding to the new national standard level 4). Under the new national standard, the classification of A, B, C and D is changed to level 1~5, and level 4 corresponds to level A safety performance.Higher, it can effectively resist violent opening and provide more reliable protection for home security.

Class A door or Level 4 door

Don’t choose:Fake Class A door or Bingding door, In order to pretend to be a Class A door, some merchants actually print the word \”Shen\” on the steel seal of the door panel, here Be sure to take a closer look!

Bingding door or fake Class A door

4. Internal filling layer

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The filling layer is:Four common fillers include aviation aluminum foil, polyurethane foam, rock wool, and honeycomb paper.

Filling

Just take the advice:Aviation aluminum foil or polyurethane foam, aviation aluminum foil: good overall performance, fireproof, moisture-proof, high strength, not easy to deform and damage. Polyurethane foam: excellent sound insulation and thermal insulation effects, can effectively block external noise and temperature transmission, creating a quiet and comfortable indoor environment

Aviation aluminum foil, polyurethane foam

Uncheck:Honeycomb paper filling, loose structure, low strength, poor sound insulation and thermal insulation performance,It is easily damaged when exposed to water and cannot provide effective protection and comfort.

Honeycomb paper

It is not recommended to choose:Rock wool is used as a filling for security doors. The disadvantage is that it is not waterproof.Absorbing water will affect the insulation and sound insulation effects, and will most likely cause the door panel to deform.

Rock wool

5. Lock core

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Listen and choose:C-level lock cylinder, which has the highest safety factor and is extremely difficult to unlock technically.It uses a single-sided blade with milled grooves inside and side posts. The lock cylinder has good anti-theft performance. Do not choose AB-level lock cylinders, as the keys are easy to be copied. The lock cylinder will become stuck after being used for a long time.

C-level lock cylinder

In addition, I personally recommend choosing the lock point for the anti-theft door: With more than 9 locking points, multiple locking points can reinforce the door body from different positions, making the door and door frame more closely connected, further improving the anti-theft performance.

More than 9 lock points

6. Door panel technology

To choose:Made in one piece, durable, no welding points, the overall structure is solid and stable, there will be no welding problems, and the door opening sound is small.

One-piece molding

Uncheck:If there are welding spots, the welding spots will open over time, causing the door body to become loose and deformed, affecting the normal use of the door, and due to welding when opening the door. Point friction can make a lot of noise.

With welding points

7. Sealing strip

Just choose:EPDM sealing strip, good sound insulation and shock absorption It has good performance, reduces the wear and tear of the door and door frame, and has good thermal insulation effect. It is moisture-proof, durable and non-deforming, and can maintain sealing performance for a long time.

EPDM sealant strip

Uncheck:PU strips or ordinary sealing strips,Let’s talk about PU strips first: they are affordable and will last a long timeIt is easy to age, harden, and crack, and the sealing effect becomes worse.

Ordinary sealing strip:After being used for a long time, it will age and have poor elasticity, so there will be a gap between the door and the door frame.The sound insulation, heat insulation, and windproof effects will be compromised.

PU strip/ordinary sealing strip

8. Hinge

To select:304 stainless steel hinge with anti-pry function,304 stainless steel hinge:Corrosion-resistant, high strength, and durable.Hinges with anti-pry function (there are raised screws on the hinges and corresponding holes on the door frame) can Effectively prevents the door from being violently opened and improves safety.

304 stainless steel hinge

Hinge quantity selection:Three or four at the top, middle and bottom, evenly distributed, making the door more balanced, reducing the risk of door sagging and deformation, and having a longer service life.

Hinge distribution

Conclusion: Traditional anti-theft doors with peepholes are indeed convenient for observation, but there are also security risks. Criminals may use the peephole to unlock the door or peek into the room. If you are concerned about security, you can consider installing a camera at the door or a fingerprint lock with a camera.