A deadlatch offers an extra layer of protection for exterior doors
A deadlatch lock provides automatic security by locking itself when you close your door, using a spring-loaded bolt and plunger mechanism for hands-free protection.
Deadlatch alignment issues occur when your strike plate sits too far from the plunger, preventing the lock from engaging properly and requiring strike plate repositioning.
You can diagnose deadlatch problems by closing your door from inside while shining light on the latch area to check if the plunger engages correctly.
Hiring a local locksmith professional provides reliable support for strike plate realignment and deadlatch repairs, keeping your exterior doors secure and operating smoothly.
Whether you’re looking for ways to beef up your home security or just want to know what that second lock on your front door is called, you’ve come to the right place.
A deadlatch is a type of door lock that locks automatically without having to turn a knob or use a key. It rests against a metal strike plate mounted on a door frame. The deadlatch works by using a bolt to block the door from opening, giving your door extra security. There are three types of deadlatch modes:
Passage - latch is open, allowing the door to open and close
Safety - automatically locks when the door is closed
Secure - lock can only be opened from the inside or outside
A deadlatch plunger is a crucial piece of the deadlatch lock. When you close the door, the plunger keeps the lock from retracting when pushed or under pressure. This prevents the door from being opened from the outside. To unlock, pressure is applied to the plunger, retracting the lach, and opening the door.
The main difference between a deadlatch and a deadbolt is that you use a key to lock a regular deadbolt from either side. When using a deadlatch, the lock falls into place once you close the door—no key necessary. If you have a deadlatch, you can leave the house without worrying whether you locked the front door.
It's all a matter of preference. You may like a deadlatch lock because you don't have the hassle of locking with a key when you leave. However, if you forget your keys, you’ll be left out in the cold.
If you like the option to lock and unlock your door on your own, opt for a deadlock.
A spring latch, also known as a latchbolt, contains a spring-loaded metal piece that engages with a strike plate when opening and closing a door. Once you turn the handle, the bolt retracts from the strike plate.
Think of a spring latch as a pinball machine: when you play, you pull the plunger, and the pressure from the springs sends the ball flying. Instead, the springs release the latch with a turn of the handle.
Additionally, deadlatches are not spring-loaded.
If you close your deadlatch and everything locks into place quickly and feels secure, you have a working deadlatch. But what if something feels off? Maybe there's a weird sound when you close your door or use your key to get in. Here's what you can do to diagnose and fix the issue:
If the door swings in, close the door from the inside as you shine a light on the latch area so you can observe the latch in operation. If it falls into the strike opening but not the deadlatch plunger, you need to move the strike plate closer to the deadlatch plunger. Here’s how to move a strike plate:
Using a screwdriver, remove the strike plate
Draw an outline where the strike plate needs to be on the door jamb
Chisel out the wood to the thickness of the strike plate so it fits in its new spot
Position the strike plate, using masking tape to tape the plate down
Test by opening and closing the door so the deadbolt catches (if not, move again)
Reinstall the strike plate by screwing it back in
Fill in the previous strike plate spot with filler and paint to touch up the door frame
The most common problem occurs when the mechanism falls into the strike opening due to improper alignment.
Heavy weather stripping can cause an issue if it compresses, making it harder for the deadlatch to lock behind you when you shut the door. If you notice you are using more force to close the door, weather stripping may be the problem.
Move the strike as necessary. You'll further protect the striker from being inoperative and prevent the plunger from jarring into it.
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