Why Deadbolt Locks Are a Smart Choice for Home Security

A deadbolt is one of the most effective and affordable ways to strengthen an exterior door. Here is how they work and how to get the most from one.

What is a deadbolt?

A deadbolt has a solid bolt that slides into the door frame when you turn the key or thumb turn. Unlike a spring latch, it cannot be pushed back by sliding a card or blade into the gap.

Single or double cylinder?

• Single cylinder: key outside, thumb turn inside. The most common choice for homes.
• Double cylinder: key on both sides. Useful next to glass, but it can slow your exit in a fire, so check local codes and keep the key nearby.
• Keypad deadbolts: a code instead of a key on the outside.

What the grades mean

ANSI/BHMA grades rate durability and strength. Grade 1 is the heavy-duty end and a common choice for front doors; Grade 2 suits most homes; Grade 3 is basic.

Installation matters

A strong deadbolt is only as good as the frame it locks into. Use a reinforced strike plate with long screws that reach the wall stud, and make sure the bolt extends fully.

Conclusion

If your exterior doors rely on a spring latch alone, adding a well-installed deadbolt is one of the most cost-effective upgrades you can make.