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Keeping your home safe and secure has become much easier with the wide variety of door locks on the market today. Even so, it is very important to know how and where the lock should be installed to give you the best security. In most cases it takes at least three locks which have been place at least a foot apart to keep a burglar from prying your door open. These tips will help you understand the what, why and how of installing locks.
Of the three locks needed to secure your home, one should be part of your doorknob or latch. There are many other locks you can add to this including police locks, deadlocks or rim locks, that will help secure your door. Be sure when installing any of these that one is installed above the doorknob and one below. It is also important when installing different locks that each has a separate key. This may seem like quite a bother but in the long run is makes your home more secure by creating a situation where each lock must be breached separately for a burglar to enter or leave by the locked door.
To install a deadlock, which is a solid bolt embedded in a door, you will need to cut a large hole in the door for the lock cylinder and a smaller hole for the bolt. For this you will need a hole saw or an expansive drill bit. Position the centers of both templates to cut the cylinder hole. In the edge of the door, drill the smaller hole so it meets the cylinder hole. Be sure to use a drill guide to keep the bit level and square. Many times after doing this it is necessary to use a chisel to shape the small hole so it will accommodate the bolt assembly and notch the wood so the face plate fits into the doors edge. Using a felt tip pen make a circle on the end of the bolt to mark the position of the keeper on the jamb. Then shut the door and turn the knob. Drill a hole in the door jamb large enough for the bolt to fit through. Then center the strike plate over it and trace the outline of the plate. Using a chisel, chip out a notch so the plate sits flush with the jamb and screw the plate in place.
Rim locks are secured to the inside face of the door in such a manner that it overhangs the edge and meets with a keeper on the frame. The best rim locks have interlocking latches. Much like a rim lock the police lock is also secured to inside face of a door. But with the double throw type, there are two bars that slide into keepers on the frame. On the steel rod type a steel rod reaches into the floor. If you are installing a rim lock or police lock the only hole you will need to cut is the lock cylinder hole. To do this position the keeper of the rim lock by closing the door and marking where the latch hits. The door will usually be inset into the frame so cut a notch for the keeper. Then use a chisel to shave the notch until the door properly closes. With a double throw police lock you should turn the knob until the bars are fully extended. Place the keeper over them and mark their positions. When installing the prop lock you will need to put the top of the steel rod in the casing. Be sure the lock is closed and then mark the place where the bottom touches the floor. Cut a notch for the plate which holds the rod. Then screw the plate into place.