One of the worst kinds of home break-ins is the kind where the bad guy just kicks in the front or back door. It doesn't really matter that your deadbolt is engaged; it only extends a couple of inches at most and the door jamb doesn't take much to splinter.
But with a little effort you can greatly enhance the holding power of the deadbolt. When the wall is framed and the door rough opening
is made, the opening is actually an inch or two wider than the door jamb requires. This allows for plumbing the jamb. Wooden shims are inserted between the framing studs and the jambs.
So this is what you do -
- Remove the trim screwed to the jamb that receives the deadbolt.
- Cut a piece of rigid metal electrical conduit about six inches long.
- Use a paddle bit the same size as the O.D. of the conduit and drill through the jamb and framing studs.
- Squirt a bit of glue inside the hole.
- Insert the conduit into the hole until it's flush and re-install the trim.
Now, it's not just the jamb holding the deadbolt, you've got the strength of the stud working for you!