What is a deadbolt?
A deadbolt is a lock with a solid bolt that extends into the door frame when you turn the key or thumb-turn. Unlike a spring latch, it stays put when pushed, so it resists prying and shimming.
Single or double cylinder?
A single-cylinder deadbolt has a key outside and a thumb-turn inside. It's the most common type and lets you leave quickly in an emergency. A double-cylinder deadbolt needs a key on both sides, which can help next to glass panels but slows escape in a fire. Check local building and fire codes before fitting one on a door used as an exit.
Look at the quality grade
Many deadbolts carry an ANSI/BHMA grade. Grade 1 is the toughest, Grade 2 is solid residential quality and Grade 3 is basic. For an exterior door, Grade 1 or 2 is a sensible choice.
The strike plate matters as much as the lock
A strong bolt is only as good as what it locks into. A reinforced strike plate fixed with long screws that reach into the wall framing makes a door much harder to kick in. This is an inexpensive upgrade worth doing at the same time.
Smart deadbolts
Keypad and app-controlled deadbolts add convenience: no keys to lose and codes you can change. Choose one with a keyed backup and replace batteries on schedule.
When to call a locksmith
If your bolt doesn't fully extend, sticks or needs the door pushed to lock, the door or strike may be misaligned. Our residential locksmiths install and adjust deadbolts across Tustin. Call 714-548-3102 for advice on your door.
