What marine corrosion does to a lock
Corrosion is a chemical process, and near saltwater it moves faster. Salt in the air settles on metal, attracts moisture and creates a thin electrolyte film that lets metals break down. Different metals in the same lock, such as a steel spring against a brass body, can corrode against each other, a process called galvanic corrosion. The result is rust inside the cylinder, green or white crust on the outside, springs that weaken and pins that stick.
You do not need to see damage to have it. A key that turns a little harder each month, a latch that sticks after rain, a keyway that feels gritty and a handle that no longer springs back are all early signs. Left alone, the lock eventually seizes, usually when you are in a hurry or when the weather is worst.
On a waterfront property the doors facing the water take the worst of it, but even the street-side door sees salt carried on the wind. Boca Raton homes along the Intracoastal and its canals all share the same environment. If you live there, assume your exterior locks need more attention than a house a few miles inland.
Choosing hardware that lasts near the water
Material matters more than brand. Solid brass resists corrosion well and looks good as it ages. Stainless steel handles salt very well, and marine-grade stainless is the toughest. Lower-grade plated zinc and thin chrome finishes tend to blister and flake within a few seasons. When you replace a lock, ask what the body and cylinder are made of, not just what the finish looks like.
Look at the details. Sealed cylinders with gaskets keep water and grit out. Covers over keyways keep spray off. Stainless screws and strike plates avoid rust streaks that run down the door. For padlocks on gates, choose models with shrouded shackles and drain holes so water does not sit inside. For electronic locks, look for outdoor ratings and replaceable gaskets.
We talk through options on the phone and at the door. The right choice depends on how exposed the door is, how often it is used and how much you care about matching the existing look. For larger replacements, our lock replacement page explains how the visit works.
A simple care routine for exposed locks
Care costs little and extends the life of hardware. After storms that drive salt spray, rinse exterior locks, handles and gate hardware with fresh water from a hose set to a gentle spray, then wipe them dry. Do not blast water into the keyway under pressure. Once a season, work the lock several times with the key and operate every latch so nothing sits unused.
Use lubricant sparingly and choose the right kind. A dry lubricant made for locks, such as a graphite or PTFE product, coats the pins without attracting dust. Heavy oils and general-purpose sprays collect grit and create a paste that jams the mechanism. Put a very small amount on the key, insert it, and work it in and out.
If a lock is already stiff, do not force it. Forcing breaks keys, and a broken key in a corroded cylinder is difficult to remove. Call for service early. For a fuller routine, see our guide on caring for locks in salt air.
Dock gates and seawall access
Many Intracoastal and canal homes have a gate where the yard meets the dock or seawall. That gate matters for more than security. It keeps wandering visitors and children away from the water, protects boats and equipment, and sometimes forms part of a required pool or water barrier. It is also one of the most exposed pieces of hardware on the property.
A good dock gate has a latch that catches by itself, hinges that do not seize, and a lock rated for outdoor use. Stainless or marine-grade components last longest. If you want guests or crew to come and go without a key, a keypad rated for the weather helps, with the PIN changed whenever the group of people changes. Do not leave a padlock hanging open on the gate, since it can be taken or swapped.
A technician can repair or replace a failing latch, rekey a gate lock, or fit a new keyed lock. See our gate lock and latch service page and our marine lock service page for more detail.
Boathouses, dock boxes and lifts
Boats bring a collection of small locks with them. There may be a boathouse door, a dock box for lines and fenders, a lift controller with a keyed switch, a fuel or electrical locker and a storage cabinet for fishing gear. Each has a lock, and each lock tends to be a small, inexpensive padlock or cam lock that corrodes quickly.
Replace those with marine-rated hardware, and consider keying them alike so one key opens the whole set of dock-side equipment. Keep a spare key for the lift controller and the boat ignition in a secure place inside the house, not on a hook at the dock. If a captain, mechanic or dock builder has used your keys, consider rekeying afterward.
A common mistake is to assume the boat itself is the target. In practice, loose tools, electronics, fuel and outboard motors are the usual items to disappear from docks. Locking the gear away takes little effort and removes the easy opportunity. For anything involving boat ignitions or engine keys, check with the marine mechanic or boat service shop who services the vessel.
Water-side doors and sliders
Rear doors facing the water are used all day, opened for air and left unlocked for convenience. They are often sliding glass doors, French doors or pocket doors that disappear into a wall. Sliders collect salt and sand in the track, and rollers wear fast. A door that does not seat properly can fail to lock without anyone noticing.
Keep tracks clean with a soft brush and a vacuum, rinse them when salt builds up and replace rollers when the door rides low. Check that the latch reaches its keeper fully. A keyed secondary lock or a bar in the track adds a second barrier. Make a habit of locking these doors at night and when you are on the boat, not only when you leave the property.
Because the back of a waterfront home is visible from boats and from neighbors' docks, lighting matters. A motion light on the water side helps, and a trimmed landscape keeps sight lines clear. See our page on sliding glass door locks for more on repairs and upgrades.
Storm surge, flooding and what water does to locks
Waterfront homes can face storm surge and heavy rain in a hurricane. Locks that have been submerged or soaked with salt water often fail later, even if they seem to work at first. Salt water leaves deposits inside the mechanism, and electronic locks can be damaged by moisture that reaches the circuit board.
After any flooding, test every lock and handle. If a lock is stiff, gritty or slow to return, rinse it with fresh water, let it dry and have it checked. Electronic locks that have been wet should be inspected before you rely on them. Do not assume the house is secure just because the door closes.
Before the season, make a list of your exterior doors and gates, test each, and find the keys for shutters and panels. After a storm, a damaged door may not latch properly even when it appears fine. If a door has shifted, a technician can adjust or repair it. Our guide on after-hurricane lock checks gives a simple checklist.
Seasonal residents and homes left alone
Many Intracoastal homes are used for part of the year. When a house is left closed for months, humidity builds, locks stiffen and small problems grow. A lock that is never used can seize, and a smart lock with dying batteries can leave you outside on arrival day.
Before you leave, work every lock, replace batteries in electronic locks, check gate latches and decide who has access while you are away. A house manager, pool service and landscaper may all need entry. Give each only what is needed, keep a written list and change keys or PINs when someone leaves the arrangement. When you return, walk the property and test everything.
For long absences, rekeying before you go removes uncertainty about old keys. Our seasonal home lock planning page has a checklist to follow, and our waterfront home lock service page covers what we handle on water-side properties.
Lockouts and lost keys at a waterfront home
If you are locked out, look for another entrance that is safe to use. Do not climb onto a dock rail or force a slider. Wet, slippery surfaces make a fall more likely, and glass is costly to replace. Ask a neighbor or house manager whether they hold a spare.
When you call, tell us the address, which door you are locked out of, any gate instructions and how you can prove you live there. A driver's license with the address, a lease or closing papers all work. If you are a manager or caretaker, we need to reach the owner. We do not explain bypass methods to the public, and we only open doors for people who can show they belong.
A key lost at the dock or in the water is a particular concern, since someone could find it but not know where it fits. If it had an address on it, or if the home has been quiet, rekey promptly. Our home lockout service page explains the process.
Contractors, dock builders and seawall work
Waterfront maintenance brings in more outside crews than most houses ever see. Dock builders, seawall repair teams, boat lift technicians, pressure washers, painters, pool service and landscapers all need to reach the water side of the property, and each crew leaves you wondering who now has a way in. The most common arrangement is to leave the dock gate unlocked or hand over a key for the duration of the job, and both can quietly turn into permanent access.
A better approach is to decide before the work starts. If the crew can reach the dock from a boat or from a side path, the house gate may not need to open at all. If they must come through the yard, give them a gate key you can account for, or a temporary PIN on a keypad lock, and write down the dates. When the job ends, collect the key or remove the PIN the same day. For long projects, rekeying the gate at the end is simple and removes any doubt.
Ask the contractor to keep tools and materials off patios and away from doors, and to close and latch gates behind them. Gates left ajar are a common reason a yard becomes open to anyone on foot. It also helps to walk the property with the crew leader at the start and end of each day. Our commercial rekey page and our key organization guide explain how to keep track of keys across many hands.
Lighting, sight lines and visibility from the water
A waterfront home is seen from more directions than a typical house. Neighbors on both sides can look across, boats pass at all hours, and the water itself is open space. That visibility can help or hurt. Well-lit doors and docks make people think twice, while a dark yard with tall landscaping near the back door gives someone cover to work unseen.
Simple changes help. Motion-activated lights on the water side switch on when anything moves. Low landscape lighting along paths shows who is walking. Trimming shrubs near doors and windows keeps sight lines open from the house and from neighbors. If you use cameras, place them to cover the doors and gates, not just the yard.
None of these replace good locks, and good locks do not replace habits. The best combination is a solid deadbolt, a firm strike, light on the door and the habit of locking up each night. A walk-through with a technician can point out weak spots in all of these. See our security assessment page to learn how that visit works.
Getting a quote and preparing for the visit
Call and describe the property: how many exterior doors and gates, which face the water, what the locks look like and what is going wrong. Quotes are given only by phone. Simple jobs can be quoted on the call. Complicated work, such as several gates or damaged frames, needs an on-site visit, and there is a service call charge explained before dispatch.
Have identification ready and something that links you to the address. Give us gate or access instructions and a contact on site. Take a quick photo of the lock or gate hardware if you can, since that helps the technician bring the right parts.
If anyone is in danger, call 911 first. For everything else, from a corroded dock gate to a stiff front door, call and describe what you see. We will explain the options and send a technician to your door.
Questions people ask
Why do locks fail so fast near the water?
Salt in the air settles on metal and holds moisture, which speeds corrosion. Springs rust, pins stick and keyways fill with grit. Plated or thin finishes break down first. Using solid brass or stainless hardware, rinsing after storms and using dry lubricant sparingly slows the damage. If a key turns hard, call early.
What lubricant should I use on a lock?
A dry lubricant made for locks, such as a graphite or PTFE product, used in a very small amount. Heavy oils and general sprays collect dust and turn into a sticky paste that jams the pins. Apply it to the key, work it in and out a few times and wipe off the excess.
Can you rekey my dock gate lock?
Usually yes, if the lock is still sound. If it is badly corroded, replacement with marine-grade hardware is the better route. A technician can check the gate, repair the latch and recommend what fits. Tell us on the phone what the gate looks like and how often it is used.
Should I change locks after a storm?
Not necessarily, but test every lock. Salt water or heavy soaking can leave deposits that cause later failure, and electronic locks may be damaged by moisture. If a lock is gritty, slow or stiff, have it checked. Doors that shifted in the storm may need adjustment so they latch and lock fully.
Can a technician help with a boat or lift key?
We handle dock and property locks, including cam locks, dock boxes and keyed lift switches in many cases. Boat ignitions and engines are best handled by the marine mechanic or boat service shop for that vessel. Tell us what you have on the phone, and we will say honestly whether it is something we can do.
Are quotes given online?
No. Quotes are given only by phone, after we hear what you have and what you need. Simple jobs can be quoted on the call. Larger or uncertain jobs need an on-site visit, and there is a service call charge, explained before anyone is dispatched. That keeps the quote matched to your property.
Describe the situation by phone and we will tell you what the job involves. Quotes are given by phone. Jobs that cannot be quoted without seeing them need a technician on site, and the service call charge is explained on the phone before anyone is dispatched.
(954) 906-9567