To prevent someone from unlocking a room door using a card or similar methods, you can take some security measures to reinforce the door's locking mechanism and make it more difficult to bypass. Here are some suggestions:
Upgrade the Lock: Consider upgrading the lock on the door to a higher-quality, more secure lock. Look for locks that have anti-picking and anti-bumping features. Grade 1 deadbolt locks are generally the most secure and recommended for exterior doors.
Install a Door Reinforcement Plate: A door reinforcement plate, also known as a security strike plate, can add extra strength to the area around the lock. Make sure the plate is made of heavy-duty metal and has long screws that extend deep into the door frame.
Add a Door Chain or Latch Guard: Installing a door chain or a latch guard can provide an additional layer of security. These devices can prevent the door from opening fully when someone tries to push it open with a card.
Use a Door Viewer (Peephole): A peephole allows you to see who is outside the door without opening it. This can help you identify potential threats and avoid opening the door for unauthorized individuals.
Install a Deadbolt Reinforcement Kit: There are reinforcement kits available that can reinforce the area around the deadbolt, making it more resistant to forced entry.
Security Bar or Door Stopper: A security bar or door stopper can be placed on the inside of the door, making it much more difficult for someone to force their way in.
Keep the Area Well-Lit: Adequate outdoor lighting can deter potential intruders and make it harder for someone to attempt unauthorized entry unnoticed.
Security System: Consider installing a security system that includes door and window sensors. These systems can alert you if someone attempts to tamper with the door.
Train Occupants and Staff: Educate the occupants of the room or property about security measures, and encourage them to keep the door locked at all times and not to open it for strangers.
Regular Maintenance: Regularly inspect and maintain the door and lock to ensure they are in good working condition.
It's important to remember that no security measure is entirely foolproof, but implementing a combination of these suggestions can significantly improve the overall security of the door and help prevent unauthorized entry.