18+ Add Deadbolt To Door Images. If your template does not encase both sides of the door, drill a pilot hole first. When you add a deadbolt onto your door, you can rest assured that your door can be opened from the outside, only with a key.
Trace around the edge of the deadbolt's faceplate.
A cylinder deadbolt, operated by a key from the outside and a thumb turn from the inside, is a good choice to protect against intruders. The bolt cannot be forced into the retracted open position by intentionally manipulating the bolt. Mark the door for drilling by taping the template to the inside of the door (wood doors have a bevel that will throw the measurements off if you use the exterior side). Many new lock sets allow you to adjust the latch to either distance.