The short answer
What the question actually means
If your key sticks or the thumbturn feels gritty, you do not necessarily need a new lock. Most of the time, the internal pins are just dirty or the door has shifted. But if the bolt does not fully engage the hole in the frame, you have a security gap. When people ask about replacement, they are usually asking if they can fix the problem with a spray can of lubricant or if the hardware is physically worn out. If the metal is grinding, it is time for a new deadbolt.
The brands that matter
Stick with Schlage or Kwikset for standard residential doors. They are the industry standard here in Northwest Florida because parts are easy to find and they fit most standard door bores. If you want something heavier for a front entry, look at Baldwin. Avoid the cheap kits from big box stores that feel like plastic. A professional grade lock handles the humidity and salt air much better, meaning you will not be calling me back in two years.
Pricing — what to expect
How to choose
Common follow-up questions
The cost depends on whether you need a basic grade 3 lock or a high security grade 1. You pay for the hardware and the labor to align it. Do not just buy the cheapest option; it will fail faster. A common question is whether to rekey the old lock or replace it. If the mechanism is smooth, rekeying saves money. If the bolt is sticking or the housing is loose, replacement is the only real fix. Always ask if the install includes a strike plate adjustment.
How locksmiths actually work the job
I start by checking the door alignment. A lock is only as good as the hole it slides into. I pull the old hardware, clear out any debris from the bore hole, and set the new bolt. I make sure the bolt throws completely without me having to pull or push the door. Then I test the key from both sides to ensure there is no binding. If the strike plate is off by a fraction of an inch, I file it down or move it.
When to call vs when to wait
Call me immediately if your key breaks off in the lock or if the deadbolt will not retract. That is an emergency. If the lock is just getting a little stiff or the finish is peeling, you can wait a few days. However, if you see daylight around the bolt when it is locked, your house is not secure. Do not wait for a break-in to realize your deadbolt was not actually hitting the strike plate.
Bottom line
Want this editorial in your inbox?
We publish straight-talk locksmith editorials weekly. No spam.