A spring latch holds a door closed. A deadbolt keeps it closed, because the bolt has no spring and cannot be pushed back or slipped with a card. The difference in real world resistance is significant, which is why a deadbolt is the single most worthwhile addition to most older external doors. What determines whether it actually helps is the quality of the installation: the depth the bolt throws, the alignment of the bore, and whether the strike plate is screwed into the frame trim or into the structural timber behind it.
What Makes a Berlin, NH Deadbolt Installation Genuinely Secure
Three measurements matter. The bolt should throw at least one inch into the frame, the strike plate should be secured with screws long enough to reach the stud behind the jamb, and the bore should be cut square so the bolt travels without friction.
Cheap installations fail on the second point almost every time. A strike held by short screws into soft trim will detach under a single determined kick regardless of how good the lock itself is.
Choosing Between Deadbolt Types in Berlin, NH
A single cylinder deadbolt takes a key outside and a thumbturn inside, which is the usual domestic choice because it allows fast escape. A double cylinder needs a key on both sides, which stops someone reaching through broken glazing but slows evacuation in a fire.
Where glazing sits within arm reach of the lock, the better answer is often laminated glass or a protective plate rather than removing your own ability to get out quickly.
Ask to see the screws going into the strike plate. If they are shorter than three inches they are not reaching the structural timber, and the installation is weaker than it looks.
Fitting Deadbolts to Different Doors Around Berlin, NH
Solid timber doors are the straightforward case. Hollow core doors need a reinforcing block because there is nothing substantial for the lock to bite into, and metal doors require the correct cutters and edge preparation.
Composite and uPVC entrances usually run a multipoint mechanism already, in which case the sensible upgrade is a better cylinder and stronger keeps rather than an added deadbolt.
- ✓Graded single and double cylinder deadbolts
- ✓Bolt throw and bore alignment checked
- ✓Reinforced strike plates with long fixings
- ✓Hollow core doors reinforced before fitting
- ✓Keyed alike with existing locks on request
Maintaining a Deadbolt in Berlin, NH Conditions
A bolt that has begun to need a shove is telling you the door has moved. Left alone it wears the bolt nose and the keep, and eventually people stop locking it because the effort is annoying, which is the real security loss.
A dry graphite or teflon lubricant once a year keeps the mechanism moving smoothly. Oil based sprays attract dust and gradually gum up a cylinder, so they are worth avoiding.