Fork. In a pinch, a simple fork can be used to temporarily lock a door that inwardly opens. To secure the door, bend the tines of the fork so that the tips of the tines fit into the door latch and the rest of the fork can comfortably remain in the gap between the door and the doorframe when the door is closed.
You don't need a key to lock most doors from the inside. Find the push-lock or twist-lock button on the inner doorknob. If your knob has a push-lock: You should see a small, cylindrical button protruding from the center of the knob. Push the button.
Double-cylinder locksets are keyed on both sides; they function with a key from both the exterior and the interior of the door. This means that a home or business owner would need to use a key to engage or retract the lock bolt even from the inside. This diagram depicts a single-cylinder lock.
A strong deadbolt lock is the linchpin of a secure entryway; the deadbolt will secure the door closed in its frame. If you don't have a strong deadbolt in place already, choose one of the best door locks with an ANSI rating of 2 or 1.
A door chain is another option and, because they require external force to be opened from the outside, they leave clear evidence should an intrusion happen. You can also choose to install steel or nickel reinforcements around the hinges, screws, or locks of your doors for additional security features.
*To give a longer and more technical explanation: A 'Dummy Handle' is one handle or a pair of handles with no latching or locking function that are also a non-turning door lever or door knob. In other words Dummy Handles & Knobs do not turn to open but rather are used to push or pull a door open or shut.
Simply stuff your sock under the door. Now you could be forgiven for thinking that by using unwashed socks the smell might keep away any would-be intruders but the intention is that the sock acts as a door wedge.
Single-cylinder deadbolts are the simplest and can be activated from one side via a key. Double-cylinder deadbolts can be used with a key from both sides.
In a pinch, a simple fork can be used to temporarily lock a door that inwardly opens. To secure the door, bend the tines of the fork so that the tips of the tines fit into the door latch and the rest of the fork can comfortably remain in the gap between the door and the doorframe when the door is closed.
For a door that opens out, build a wall by stacking desks or propping a table up in order to block the intruder's ability to see inside the room once the door is opened. For a door that swings in, push heavy furniture against it, prop a chair under the handle or use door jams.
Lock drilling is as simple as it sounds. A burglar will use an electric drill in an attempt to drill the pins in the cylinder.
The main concern with thumb turn locks is that if someone wanted to enter and they could reach the thumb turn from outside, they'd easily be able to get in. This is only really an issue in certain circumstances, and can be protected against.
Door lock problems are often caused by a malfunctioning lock mechanism or latch assembly, but there are several common reasons why locks stop working: The lock is dry or dirty. It doesn't fit in the door properly. The latch and strike plate don't align.
Double locking is a theft protection feature that prevents someone from opening the doors from the inside. You can only double lock the doors if they are all closed.
Use Security Film Over Glass Inserts
Burglars will sometimes break the glass in order to unlock the door and break into the home. Security film will help to reinforce the glass, making it more difficult to break.