Unlike a normal door where you would fully recess the latch into the door and it would close against a frame with a rebated double door like ours the latch actually needs to sit partly out from being fully inside the door.
Fitting a mortice lock to a rebated door.
To install this lock see section 4 below.
The second important part of this how to is to buy a rebate kit.
Easy to follow instructional video on how to install a mortice lock in rebated double timber doors.
The fitting instructions supplied with a mortice lock will normally specify the thickness of door it is designed for problems will arise if a mortice lock is fitted to a door thinner than it is designed for.
If you want to fit one yourself you ll need to be capable of woodworking as well as using the tools required to fit the lock.
A mortice mortise deadlock is a strong form of lock that is embedded within a cut out pocket space inside the door or furniture structure as well as having external components.
When the door needs to be opened a door handle or sometimes a knob is turned which in turn is attached to the latch via a door bar or door spindle that runs through the latch.
When possible fit two locks on your front door both to bs3621 standard.