If you re installing a pre hung door make sure you get the correct swing determined by the placement of the hinges and doorknob.
How to install a bathroom door lock.
To begin place a door stop to ensure that the door is locked in place.
A simple walk through video on how to fit a bathroom lock to your internal door.
Mark the top and bottom of the door lock with a pencil.
This video will show you how to replace a lockable bedroom bathroom doorknob or door handle.
If the knob is to the right select a right handed door.
Open the door and stand with your back to the hinges.
Hand thread the screws then tighten them using a screwdriver or power drill.
The most widely used type of bathroom door lock is a knob or lever lock with a built in privacy function.
The door will open freely at all times when the bathroom in unoccupied.
Snap on the decorative outer plate.
Place the lock against the face of the door so that the locks face plate is flush with the door edge now take a pencil and make a mark through the locks spindle holes to the door face the locks spindle hole and the spindle that will lock the lock allow the handles to work the lock correctly after installation.
Attach the interior part of the deadbolt lock by inserting the two provided long screws through the interior plate the two screw holes in the bolt and into the exterior side of the lock.
If the doorknob is on the left you need a left handed door.
Then hold either the door lock or door bolt against the edge of the door.
When you enter the bathroom you press a locking button on the inside of the knob or lever.