Posted On: May 26, 2026
Author: Jason H.
deck maintenance outdoor living home improvement
A wooden deck is one of the few parts of a house that's actively trying to fail. Sun cooks the top side. Rain soaks the boards. Snow and ice work into the joints. Insects find their way into anything with moisture. Ignore it for a few years and you'll be replacing boards, then joists, then the whole thing.
The good news is that a real deck maintenance routine takes about half a day per year. Inspect in spring, clean in early summer, reseal or restain every two to three years. That's the playbook.
Grab a flathead screwdriver. That's the main tool you need. The screwdriver is for poking suspicious-looking wood to test for rot. Soft, spongy wood means the rot is past the surface and into the core of the board.
Start at the ledger board. This is the piece of lumber that bolts your deck to the house, and it's the single most important structural element. If the ledger fails, the deck collapses. Look at the lag bolts (or carriage bolts) that hold it to the house. Are they rusty? Is the wood around them rotted? Is there a gap forming between the ledger and the siding? A failed ledger isn't a DIY repair. Call a deck builder.
Then the railings and posts. Grab each one and shake. Wobbly is bad. Wobbly with a ten-foot drop on the other side is dangerous. Most railing wobble comes from loose lag bolts at the post bases, which can be tightened. If the post itself feels rotten at the base, that's a replacement.
Walk every board. Listen for creaks. Feel for bounce. A bouncy deck board usually just needs a few new deck screws to pull it tight to the joist. Replace any board that's split, cupped (curling into a U-shape), or visibly rotted.
Check the fasteners. Old decks were built with nails. Nails work loose over time. Every time you find a popped nail, replace it with a longer deck screw. Two reasons: nails won't hold once they've started backing out, and exposed nail heads are a foot-injury risk.
Look at the joists from below if you can get under there. This is where rot starts in older decks because the joists stay wet longest. Check where the joists meet the ledger and where they cross the support beams. Soft wood here is bad news.
After you've fixed anything the inspection turned up, the deck needs a deep clean before any sealer or stain.
Sweep first. Anything that's been on the deck for a season (leaves, pollen, dirt) will compromise the cleaning if you skip this step. Pay attention to the gaps between boards. Stuff packs in there and holds moisture against the wood, which is exactly what you don't want.
For the actual cleaning, buy a deck cleaner sold for your deck material. Wood decks use wood cleaner, composite decks use composite cleaner. The formulations are different. Apply, let it sit (usually 10-20 minutes), scrub with a stiff brush on a pole, rinse with a hose.
The pressure washer question: yes if you're careful, no if you're not. A pressure washer at high pressure can shred a softwood deck in seconds. If you use one, set it to the lowest effective pressure (typically 500-1200 PSI for wood), use a 25 or 40-degree fan tip, hold the wand 12 to 18 inches from the surface, and keep it moving. If in doubt, stick to the brush.
After cleaning, wait until the deck is fully dry. That's usually 48 to 72 hours of dry weather. Don't try to skip this. Sealant or stain applied to damp wood traps the moisture inside and accelerates the rot you're trying to prevent.
Then you have a decision: sealer or stain.
Sealer is clear. It waterproofs the wood but offers little UV protection. Your deck will still gray over time. You'll need to reapply every 1-2 years.
Semi-transparent stain has pigment but lets the grain show through. It blocks UV better than sealer, lasts 2-3 years before needing recoating, and it's what I'd choose for most decks.
Solid stain is more like paint. Maximum UV protection, longest interval between recoats (3-5 years), but it hides the wood grain. It also tends to peel rather than fade when it's time to redo it, which makes the next refinishing harder.
To decide if your deck needs a fresh coat at all: drop a tablespoon of water on a few different boards. If it beads up and sits on the surface, you're fine. If it soaks in within five minutes, the existing coating has worn through and it's time to recoat.
For application, brushes on the railings and stairs, rollers or pads on the main field. Two thin coats outperform one thick coat, every time. Read the manufacturer's recoat window (usually 1-4 hours between coats) and check that you have three days of dry weather before you start.
Spring inspection. Summer cleaning. Reseal or restain every 2-3 years, depending on which you used and how much weather your deck takes.
That's it. The decks that fall apart in five years skipped the inspection step. The ones that look great at fifteen kept up with it. There's nothing more to it than that.
Properteer remembers your deck's cleaning and refinishing schedule alongside your other annual jobs. A reminder shows up when you're due, with the specifics (product, last application date, recommended next interval) attached.
