Open the door halfway and tap two shims one from each side between the floor and the door bottom to hold it steady.
How cut into door for locks.
You ll need to cut a mortise a small shallow recess in the wood of the door and doorjamb for the latchbolt and strike plate to rest.
With a square extend this mark across the door s edge and 3 inches onto one face.
Draw around it carefully always keeping it central to the mark that you made.
The depths of the recesses in the door frame must be equal to the lengths of the latch and locking bolt.
Position the strike plate on the jamb so it is centered on both lines.
Score around the plate with a sharp utility knife.
Fold this template around the edge of the door at least 6 inches above.
Then gently tap the back end of the chisel with a hammer or mallet pushing it into the door.
Measure up from the finish floor 36 inches or the height of other knobs in the house and mark the door s edge.
Using a sharp 1 inch wide chisel cut a series of parallel lines into the jamb about 1 4 inch apart staying within the scored lines and holding the chisel perpendicular to the wood.
To prepare the mortice slot for the lock start by marking the centre of the thickness of the door.
Create the mortise using a router attachment remove the wood between the pencil lines drawn on the door edge to create a mortise for the faceplate.
Fit the latch and faceplate into the door.
Place the edge of a sharp chisel into any of the mortise outline grooves.
Remove the deadbolt from its packaging and take out the instruction sheet with the template for marking the holes on the door.
Make a cut out for the strike plate make a cut out of about 3 mm deep into which the strike plate fits neatly.
Fortunately cutting out this mortise isn t nearly as difficult as it sounds.
With the large hole cut it s now time to drill the small 1 inch hole in the edge of the door.
Use a bevel edge chisel and hammer to square the corners of the mortise if the faceplate has square corners.
Knowing how to cut a mortise is essential for installing a deadbolt lock.
You want to drill part way into one side of the door stop and then start to drill from the other side.
The outer face of the strike plate should be flush with the edge of the door frame.