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.
Fitting front door lock.
The key to success is getting the hole for the cylinder in the right position.
Take care with the marking out and drilling to ensure excellent results.
Usually the backset measures 2 3 8 inches or 2 3 4 inches.
A 5 lever mortice deadlock conforming to bs3621 will have the british standard kitemark engraved on the faceplate of the lock and operates the same way as a standard 5 lever mortice deadlock.
Fitting a front door rim lock fitting a rim lock the yale type lock on your front door is fairly straight forward.
The same lock can be used in doors that open both to the left and the right.
Interior doors are usually fitted with a mortise lock with a latch operated by the door handle or knob.
5 lever mortice deadlock conforming to bs3621 more secure type of front door lock back door lock.
The distance between the edge of the door and the center of the lock hole.
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.