Salt Air and Your Locks: Coastal Lock Care in South Florida

What salt does to a lock

Sea spray carries salt inland on the breeze and settles on everything, including inside your lock's keyway. Mixed with South Florida humidity, it corrodes the small brass and steel pins and springs inside the cylinder. The first sign is a key that needs a wiggle. Then a key that needs force. Then a snapped key or a lock that won't turn at all, usually at the worst moment.

The once-a-year routine

1. Rinse and dry the outside of exterior hardware with fresh water now and then, especially after storms. Salt that's rinsed off can't corrode.
2. Lubricate the cylinder with a dry graphite or PTFE lubricant, or a product made for locks. Puff or spray a small amount into the keyway, then insert and turn the key several times.
3. Work the deadbolt with the door open and check that the bolt slides freely. If it drags on the strike, the door has shifted; that's a quick adjustment.
4. Clean the key. A dirty, sandy key carries grit into the lock every time you use it.

What not to use

Avoid general-purpose penetrating oils and grease in lock cylinders. They're fine for freeing a stuck bolt in an emergency, but they leave a sticky film that catches dust, sand and salt and gums up the pins over time. Don't force a stuck key with pliers either. A snapped key turns a lubrication job into an extraction job.

Choosing hardware for the coast

When you replace exterior hardware near the water, the materials and finish matter. Solid brass and good-quality stainless steel generally hold up better than plated zinc, and some manufacturers offer finishes specifically rated for coastal or marine environments. Look at the product specifications, and remember that the inside of the cylinder matters as much as the finish you see. Gate latches and dock hardware face the worst of it and deserve the best materials.

Smart locks on the coast

Electronics near salt water need extra care: choose a model rated for exterior use, keep the keypad out of direct weather where you can, and replace batteries on a schedule. See smart lock installation.

When to call us

If a lock is still stiff after lubrication, the key has to be forced, or you can see green or white corrosion inside the keyway, it needs servicing or replacing before it fails. We can clean and rekey a cylinder with fresh pins, or replace it with hardware that suits a coastal home.