You are sitting on your deck in Cary on a quiet June evening, and every time you shift your weight, a high pitched groan cuts through the calm. That squeak is not just annoying. In Cary's freeze thaw climate, a squeaky board is often the first sign that a fastener has loosened, a joist has shifted, or moisture has started to rot the wood from underneath. Ignoring it for a season can turn a $50 fix into a $500 repair. Here is exactly how to silence those boards, and more importantly, when to call a professional like Burns Carpentry before the problem gets worse.
Why Wood Decks Squeak: Common Causes in Cary's Climate
Cary gets about 35 inches of rain and 30 inches of snow each year, with temperatures swinging from below zero in January to the high 80s in July. That constant cycle of wetting and drying causes wood to expand and contract. Over time, the nails or screws holding your deck boards down work themselves loose. The squeak you hear is the board rubbing against the nail shank or shifting against the joist below.
The number one cause of deck squeaks is nails. Nails have smooth shafts and no threads. As the wood moves, nails back out. Even galvanized nails lose their grip after a few seasons. The second cause is undersized joists or joists spaced too far apart. When you step on a board between two joists, it flexes and rubs against the fastener. The third cause is trapped moisture between the decking and the joist, which softens the wood and lets the fastener wiggle free.
In Cary's older neighborhoods, many decks were built with pressure treated lumber and standard nails. If your deck is more than eight years old and has never been refastened, you likely have a dozen loose boards waiting to squeak.
Step 1: Identifying the Squeaky Board and Loose Fasteners
Grab a friend and walk across the deck slowly. Every time you hear a squeak, have your friend mark the spot with a piece of chalk or a sticky note. Do not just mark the board. Mark the exact location on the board where the squeak happens. Most squeaks occur over a joist, so the mark should be at the fastener line.
After you find the noisy spots, get down on your hands and knees and look at the fasteners in those areas. Are any nail heads sticking up above the wood surface? Can you wiggle a screw with your fingers? If the fastener head is below the surface but the wood around it looks dark, soft, or crumbly, you have rot. That changes everything.
You also want to check the ledger board, which is the board bolted to your house. A squeak near the house wall could mean the ledger is pulling away. Tap it with a hammer. If you hear a hollow sound instead of a solid thud, the bolts may have loosened. That is a structural issue, not a board issue, and you should call a professional immediately.
Step 2: Quick Fixes for Minor Squeaks (Shims and Screws)
If the fastener is loose but the wood is solid, the fix is straightforward. You need to replace the old fastener with a deck screw. Not a drywall screw. Not a wood screw from the hardware store. A proper deck screw has a coarse thread and a weather resistant coating. A box of 100 costs about $12 to $18 at any hardware store in Cary.
Here is the process:
- Remove the old fastener. Use a pry bar or cat's paw to pull the nail or screw. If it is a nail, you can drive it below the surface with a nail set, but replacing it is better.
- Predrill a pilot hole at a slight angle (15 to 20 degrees) through the board and into the joist. This prevents the wood from splitting and gives the screw more bite.
- Drive the deck screw until the head is just below the wood surface. Do not overtighten. If you strip the head, the screw is useless.
Sometimes the squeak comes from the board rubbing against the joist, not the fastener. In that case, you can shim the gap. Slip a thin piece of plastic shim or a cedar shingle between the board and the joist at the squeak point. Tap it in until the board stops moving. Then drive a screw through the board and shim into the joist. Snip off any exposed shim with a utility knife.
If you have a board that is cupped or warped, shimming alone will not fix it. You need to replace that board. Warped boards create constant pressure against fasteners and will keep loosening no matter how many screws you install.
One red flag to watch for: if you drive a screw and it spins freely without biting, the joist underneath is rotted. Stop immediately. That board needs to come up, and the joist needs inspection and likely replacement.
Step 3: When Squeaks Signal Structural Problems (Call a Pro)
Not every squeak is a simple fix. If you find any of the following, stop your DIY project and call Burns Carpentry for a deck inspection:
- Soft, spongy wood. If you can push a screwdriver into the board or joist more than a quarter inch without effort, rot has set in. In Cary's humid summers, rot spreads fast.
- Multiple squeaks on the same joist. If every board over one joist is squeaking, the joist itself may be cracked or undersized.
- Squeaks that move. If you mark a squeak spot and two weeks later the squeak has moved to a different spot on the same board, the joist is shifting.
- Visible gaps or sagging. If the deck surface dips when you walk across it, the framing is compromised.
Burns Carpentry handles deck repairs for homeowners in Cary and across McHenry County. Their process starts with a thorough inspection of the entire structure, not just the noisy board. They check the ledger, the posts, the joists, and the footing. If the joist is rotted, they can sister a new joist alongside it. If the decking is failing, they can replace individual boards or the entire surface. They also handle the permitting process with the Village of Cary, which is required for any structural repair in 2026.
A full deck inspection by Burns Carpentry costs nothing (their estimates are free) and takes about 45 minutes. They will tell you exactly what needs fixing and what can wait. That kind of straight talk is rare in this industry.
Preventing Future Squeaks: Annual Maintenance Tips for Cary Homeowners
A squeak free deck starts with a yearly maintenance routine. Do this in early spring, before the heavy rain season and right after the snow melts. Here is what to do:
- Walk the deck with a screwdriver. Tap each board near the fasteners. If you hear a hollow sound, the fastener is loose. Drive a new deck screw next to it.
- Check all exposed fasteners. Any nail head that has popped up should be replaced with a screw. Do not just hammer it back down. It will pop up again next year.
- Clean the gaps between boards. Use a putty knife or a pressure washer on low setting to remove dirt and debris. Trapped debris holds moisture against the wood and accelerates rot.
- Inspect the ledger board. Look for gaps between the ledger and the house siding. If you see daylight, the bolts may need tightening. Call a professional for this.
- Apply a water repellent sealer every two to three years. In Cary's climate, unsealed wood absorbs moisture during fall rains and expands, then shrinks in winter dry air. That movement loosens fasteners.
One thing most homeowners get wrong: they use a solid stain or paint on their deck. Paint traps moisture inside the wood and causes rot faster than any other finish. Stick with a semi transparent stain or a clear water repellent. Your deck will last years longer.
If you have a composite deck, maintenance is easier but not zero. Composite boards can still squeak if the framing moves. The fix is the same: drive a screw into the joist. Composite does not rot, but the screws can still loosen over time.
Frequently Asked Questions
How much does it cost to fix a squeaky deck board in Cary?
If you do it yourself, the cost is about $12 for a box of deck screws and maybe $5 for a pack of shims. If you hire a professional like Burns Carpentry to fix multiple boards, expect $150 to $350 for a typical repair, depending on how many boards need attention and whether any joists need sistering. A full deck inspection is free with Burns Carpentry.
Can I use regular wood screws for Deck Repairs?
No. Regular wood screws are not weather resistant and will rust within a year in Cary's climate. Use only deck screws with a corrosion resistant coating, such as ceramic coated or stainless steel. They cost a little more but will not snap or rust.
When should I replace my deck instead of repairing it?
If more than 30 percent of the deck boards are rotted or warped, or if three or more joists have significant rot, replacement is usually more economical than repair. Burns Carpentry can give you a honest assessment during a free estimate. They build both wood and Composite Decks, so they can recommend the best option for your home and budget.
Does Burns Carpentry handle permits for deck repairs in Cary?
Yes, Burns Carpentry manages all required permits for deck repairs and replacements in Cary. They handle the application process with the Village of Cary municipal offices, ensuring all work meets current building codes. This is especially important for structural repairs in 2026, as code requirements have tightened around ledger connections and footing depths.
If your deck squeaks are beyond a simple screw fix, or if you want a professional to check the entire structure before summer hits, Burns Carpentry is the right call. They serve Cary and the surrounding areas including Arlington Heights, Aurora, Chicago, Elgin, Joliet, Naperville, Palatine, Schaumburg, and Waukegan. Their free estimate includes a thorough inspection and a clear explanation of what needs to happen. No pressure, no fluff, just honest work from folks who have been building decks in Illinois for years. Give them a call and get that deck quiet again.
