What is a deadbolt?
A deadbolt is a solid metal bolt that slides into the door frame when locked. Unlike a spring latch, it can't be pushed back with a card or by forcing the door, because it only moves when the key or thumb-turn moves it.
Single, double and keyless
- Single cylinder: key outside, thumb-turn inside. The most common type for homes.
- Double cylinder: key on both sides. Useful next to glass, but it can slow an exit in a fire, so check local codes and keep a key nearby.
- Keypad or smart: code or app entry, usually with a key override.
What grades mean
Many deadbolts are rated to ANSI/BHMA standards, with Grade 1 the most durable, then Grade 2 and Grade 3. For exterior doors, Grade 1 or 2 is a sensible target. The packaging or manufacturer's specification usually lists the grade.
The frame 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 the wall framing makes a big difference to how well a door resists being kicked. We check this whenever we fit a deadbolt.
Simple habits
- Make sure the bolt extends fully; if it drags, the door may need adjusting
- Lock it every time, not just at night
- Rekey when keys go missing
Deadbolt installation in Westminster
We supply and fit deadbolts from brands such as Schlage and Yale, and can key them to match your other locks. See our residential locksmith services.
