Most deadbolt lock manufacturers provide a template to help you install the lock.
Diy door lock installation.
People also lose keys.
There could be a rental situation where you want to feel safe in knowing that no one else has a key to your residence.
The template is designed to work with doors of different thicknesses and has reference points that may be marked on the door with an awl.
The deadbolt should be at least 6 above your doorknob.
In this video barry from bunnings warehouse demonstrates how to fit a deadlock to a door.
Door locks and doors themselves wear out over time.
Preparing for installation if you re installing a lockset in an existing door take out the old lockset and measure the backset the distance from the door edge to the center of the lockset hole.
If you re in a situation where you cannot or do not want to use a drill to install your lock there are a couple ways of installing an interior door lock without a drill.
If your new deadbolt has a concealed screw for the interior door knob consult the installation instructions for your specific lock.