What about your back door? Side door?
Basement door? French doors? Porch doors?
Could your front door be broken open with a kick?
Your door must be solid wood or metal. A hollow core door can be broken easily.
BUT, a strong, solid door with a weak lock is NOT SECURE!!
Deadbolt locks cannot be pried open or jimmied open.
The original locks on most of our doors are springlatches that are poor security.
Tubular deadbolts should extend up to 1 inch into the doorframe.
Jimmy-proof deadbolts mount on the door surface (the rim).
BUT, a deadbolt lock with a weak doorjamb is NOT SECURE!!
Locks need a strong strike plate that is secured into the structural door framing.
A strike plate that is mounted to the doorframe with small screws will easily splinter away under pressure.
Strike plates must be strong and be large enough that several screws can be used. Screws should be long enough to extend into the structural wood surrounding the doorframe.
BUT, an excellent lock near glass windows is NOT SECURE!!
Many of our beautiful doors have glass panels and have glass sidelight windows on either side of the door.
Glass doors need deadbolt locks with removable inside keys.
When you remove the inside keys from the locks, burglars cannot reach in and unlock them.
Even if burglars get in to your house somewhere else, they cannot open the doors and carry your things away. This cuts losses.
Both tubular and jimmy-proof deadbolts are available with double keys.
Door chains are NOT locks. They have small screws that can be ripped out easily. The chain is not strong.