Composite vs. Wood Decking: Built for Chicago Weather
Every deck material sales pitch was written somewhere with better weather. Chicagoland decks endure freeze-thaw cycling, snow sitting for weeks, and humid 90-degree Julys — so this comparison is written for here, not for a brochure.
The honest headline: wood is cheaper to build and more expensive to own; composite is the reverse. The crossover happens faster in our climate than almost anywhere.
15-year cost of ownership
| Cost line | Pressure-treated wood | Mid-tier composite |
|---|---|---|
| Build (12×16 typical) | $6,000–$10,000 | $10,000–$15,500 |
| Staining/sealing every 2–3 yrs | $500–$900 per cycle (×5–6) | $0 |
| Board & fastener repairs | Rising after year 8 | Minimal |
| 15-year total, typical | $9,500–$15,000+ | $10,500–$16,000 |
The totals converge — which means the real decision is about maintenance appetite and how each material lives, not sticker price.
How each one lives here
- Wood: warm underfoot, real-lumber looks, sandable and repairable; asks for cleaning + re-stain every 2–3 seasons, and Chicago freeze-thaw checks and splinters neglected boards fast
- Composite: fade/stain-warrantied color, soap-and-water care; darker boards run hot barefoot in July, and cheap early-generation boards created its bad reputation — modern capped boards are a different product
- Both: the frame underneath is treated wood either way — footings below 42" frost depth, flashed ledger, and joist protection decide lifespan more than the deck surface does
Choose by owner type
- Choose wood if: budget rules today, you genuinely will stain on schedule (be honest), or you love real lumber and patina
- Choose composite if: you're staying 10+ years, weekends are for anything but staining, or bare feet and kids own the deck
- Either way: railing choice (wood vs. aluminum vs. cable) swings the visual and the budget as much as the deck boards do
Frequently asked questions
Does composite get slippery in winter?
Textured modern boards grip comparably to wood; both ice over. Plastic shovels only, and skip metal edges and rock salt on wood.
Can composite go over my existing frame?
If the frame is sound, properly footed, and joist spacing meets the board's spec (often 16" or tighter) — yes, a re-deck saves thousands.
What about PVC decking?
Fully synthetic, lightest and most waterproof, priciest. Worth it around pools/hot tubs; overkill for most backyard decks.
Which adds more home value?
Comparable at appraisal; composite shows better in listings after year five because it still looks new. Condition beats material.