However if you only fit one lock make it an automatically dead locking night latch.
Fitting a front door lock.
For front doors it is best to fit two locks a mortice deadlock about halfway up and a night latch one third of the way down the door.
The key to success is getting the hole for the cylinder in the right position.
Where the door is self closing the latch has an angled or rounded edge and is sprung so that it automatically locks when the door is closed.
Position a mortice deadlock about halfway up the door and fit a night latch on your front door one third of the way down.
Take care with the marking out and drilling to ensure excellent results.
As a rule the more levers pins or discs that a lock has the harder it will be to pick.
To install this lock see section 4 below.
When possible fit two locks on your front door both to bs3621 standard.
Interior doors are usually fitted with a mortise lock with a latch operated by the door handle or knob.
If you only fit one lock go for an automatically dead locking night latch made to bs3621.
Expert tip fitting a night latch that is british standard approved will improve the security of your door.