Your deck is one of the biggest outdoor investments in your home—but without a solid maintenance routine, that beautiful wood or composite surface will deteriorate quickly, costing you thousands in repairs down the road. A proactive maintenance schedule prevents rot, splinters, fading, and structural damage while extending your deck's lifespan by 10-15 years. This guide breaks down exactly what to do each season and year to keep your deck in top condition.
Spring Inspection & Cleaning
Start your deck year by removing winter debris—leaves, dirt, and standing water are the primary culprits behind wood rot and mold. Sweep thoroughly, then use a pressure washer at 1,500 PSI or lower to avoid gouging the wood or composite surface. For stubborn stains or algae growth, a deck-specific cleaner ($15–$40 per bottle) applied 15 minutes before pressure washing works well.
While you're out there, inspect for damage:
- Soft spots or sponginess in the wood (sign of rot underneath)
- Loose or corroded fasteners (nails popping, screws backing out)
- Cracked or warped boards, especially at the edges
- Railing stability—grab it firmly and check for movement
- Joist and ledger connections (look for gaps or separation)
Addressing small repairs in spring costs $100–$400; waiting until fall can mean $1,000+ in damage.
Summer: Staining & Sealing
If your deck is wood, plan to restain or reseal every 2–3 years, depending on your climate and sun exposure. Summer is ideal because the wood needs 48–72 hours of dry weather to cure properly.
Before staining, the deck must be stripped and sanded if the old finish is peeling or worn. Professional stripping runs $1–$2 per square foot; DIY sanding rental is $30–$60 per day for a belt sander. New stain and sealer typically cost $0.50–$1.50 per square foot installed, or $800–$3,000 for a 1,000 sq ft deck.
Composite decks need less frequent staining but benefit from an annual sealant coat ($0.25–$0.75 per sq ft) to resist UV fading and moisture. Unlike wood, composites never truly need restaining—just protective sealing.
Summer & Fall: Nail & Screw Checks
As temperatures change, wood expands and contracts, causing fasteners to loosen. Walk the deck with a hammer and gently tap along the boards. Hollow-sounding taps mean the fastener has popped and needs replacement. Use corrosion-resistant stainless steel or galvanized fasteners ($0.05–$0.15 each) to prevent rust bleeding and future failures.
Replace any fasteners showing rust or discoloration immediately; rust spreads and weakens structural integrity.
Fall: Repairs & Rot Treatment
Before winter, tackle any structural issues you've spotted. A rotted board costs $30–$80 to replace; a rotted joist can cost $300–$800 depending on severity and accessibility.
For minor surface rot (less than 1/4 inch deep), a two-part wood epoxy ($20–$50) can stop progression. Deeper rot always requires replacement, not patching.
Check your ledger board—the connection where your deck attaches to your house. This is where water infiltrates and causes catastrophic rot. If you see gaps, water stains, or soft spots, hire a professional immediately ($500–$2,000 to repair). A failing ledger is a safety hazard and the most expensive deck problem to fix.
Winter: Leave It Alone (Mostly)
Clear snow and ice promptly to prevent weight damage and ice dam formation under railings. Use a plastic shovel—never salt your deck, as it accelerates wood degradation. Apply a non-slip coating or ice melt rated for decks only.
Inspect visually after heavy storms for cracked or broken boards.
When to Call a Professional
If your inspection reveals rot extending more than 1 inch, multiple loose posts, or railing issues, hire a licensed deck contractor. Get 2–3 quotes; legitimate companies charge $50–$100 for in-person inspections and provide written estimates. Use Mercoly to compare trusted deck repair and staining providers in your area so you're not guessing on credentials or pricing.
Frequently Asked Questions
Q: How often should I restain my wood deck? Every 2–3 years is typical, but this depends on climate, sun exposure, and whether your deck is covered—exposed decks in sunny climates may need restaining every 18–24 months.
Q: Can I stain over peeling or cracked finish? No—stain won't adhere to loose finish. You must sand and strip the deck down to bare wood first, which is why professional stripping is often worth the $800–$1,500 cost rather than a DIY mishap.
Q: What's the difference between deck stain and sealant? Stain adds color and pigment while sealing; sealant is clear and provides only water and UV protection without changing wood color.
Get quotes from multiple deck professionals in your area today to stay ahead of maintenance costs.