To change the lock on a regular door knob first use a screwdriver to remove the door knob and the old latch.
How to change door lock keys.
I am a locksmith with 35 years experience.
If you have a window in or next to the door a lock with key cylinders on both sides is preferable as long as local codes allow and you keep a key within reach.
Next put a new latch in and replace the door knob.
Change the locks when your keys have been lost or stolen.
Alternatively you can buy a re keying kit for the lock you already have.
However rekeying a lock can also improve a building s security measures after a new home construction during which a number of people might have copies of door keys including contractors.
Before you learn how to change door locks measure the space where you ll install the replacement.
How to re key a door lock change your locks yourself by removing the lock cylinder and changing the pins.
Once you have the kit remove the lock cylinder from the door knob so you can change the pins inside.
Measure the diameter of the holes currently cut out of your door so you can select a new door lock that fits those dimensions.
Having the combination changed is more affordable.
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