Types of deadbolt
- Single cylinder: key outside, thumb turn inside. The most common choice for homes.
- Double cylinder: key on both sides. Useful next to glass, but check fire safety and local code, since you need a key to get out.
- Keypad and smart deadbolts: code or app entry, no key to lose.
- High-security deadbolts: pick and drill resistant with restricted keys.
What makes a deadbolt strong
Look for a full one-inch throw, a hardened bolt and a solid housing. Just as important is the strike: many forced entries break the door frame, not the lock. We can fit a reinforced strike plate with long screws that reach the wall framing.
Installation on new or existing doors
On a door with no deadbolt, we bore the holes, cut the latch pocket and fit the strike. On an existing deadbolt, we replace it with a stronger model and key it to match your other locks if they share a keyway. See also lock change and rekeying.
Frequently asked questions
Can you add a deadbolt to a door that never had one?
Usually, yes, if the door is solid enough. Hollow-core doors are not suitable for a secure deadbolt.
Are smart deadbolts secure?
A good-quality smart deadbolt is as strong mechanically as a keyed one. Choose a reputable brand, keep the firmware updated and use a strong code.