Composite Decking vs Wood: Real Cost Compared

Composite decking costs more on day one than pressure-treated wood, and that sticker shock is usually where the composite decking vs wood decision stalls. But the price on the lumber yard receipt is only half the story. Wood needs regular restaining, replacement boards and more frequent repairs over a 20-year ownership period, while composite is largely a buy-it-and-leave-it material. This piece breaks down real cost per square foot, how long each material actually lasts, what staining and sealing really costs over time, and what the warranties are worth, so you can compare total cost of ownership instead of just the opening price.

Composite Decking vs Wood: Cost Per Square Foot

Start with materials alone, since that's the number most people compare first. Pressure-treated pine typically runs $3-6 per square foot, the cheapest decking material you can buy new. Composite decking, including well-known brands often compared in a trex vs wood decking cost search — see our dedicated Trex decking cost breakdown — sits at roughly $5-14 per square foot, and exotic hardwoods like ipe run $10-20 per square foot, according to Angi. Add labour, which runs roughly $15-35 per square foot regardless of material, and total installed cost for most decks lands between $30-60 per square foot, per Angi and NerdWallet. On a straightforward 320 sq ft deck, that's a materials difference of perhaps $600-2,500 between basic pressure-treated pine and mid-range composite, before framing lumber, which both decks need underneath. Run your own footprint through the deck material calculator to see the gap for your project.

How Long Does Each Material Actually Last?

Pressure-treated pine, properly maintained, typically lasts 15-25 years before boards need wholesale replacement, though individual boards can fail sooner if fasteners or drainage are poor; our deck repair cost guide covers what those fixes tend to cost. Composite decking is built from a wood-plastic blend that resists rot, insect damage and splintering, and most boards are backed to last 25-50 years under their manufacturer warranty. That gap matters more than it looks on paper: a wood deck built today might need a full board replacement around the time a composite deck is only halfway through its expected life. Exotic hardwoods split the difference, often lasting 25 years or more with the right oiling schedule, but at a materials cost that erodes their long-term advantage over composite.

Do You Really Need to Stain and Seal Wood Decking?

Yes, and skipping it is the single biggest false economy in wood decking. Untreated or unsealed boards absorb rainwater, swell, cup and eventually crack, while UV exposure greys the surface within a season or two. Most wood decks need restaining or resealing every 1-3 years to stay protected, and that's not a one-off cost: it's stain or sealant product, your own weekend or a contractor's day rate, every couple of years for as long as you own the deck. Composite decking skips this step completely. There's no staining, no sealing and no annual weatherproofing routine, which is the main reason composite's total cost of ownership often looks better than its sticker price suggests.

What Do Composite Decking Warranties Actually Cover?

Most major composite manufacturers back their boards with limited warranties running 25 to 50 years, covering structural failure, rot and, in many cases, fade or stain resistance for a shorter window within that term. Pressure-treated wood doesn't come with anything comparable; the treatment protects against rot and insects for a rated period, but there's no manufacturer standing behind board performance the way there is with composite. Read the fine print carefully though: warranties are typically prorated after the first several years, and installation errors, like blocked drainage gaps between boards, can void coverage entirely.

Total Cost of Ownership: Wood vs Composite Over 20 Years

Sticker price tells you almost nothing about what a deck costs over its full lifetime; our deck cost per square foot guide walks through the upfront numbers in more detail. A pressure-treated deck might cost less to install, but factor in restaining every couple of years, occasional board swaps, and a full board replacement partway through a 20-year window, and the gap narrows fast. Composite costs more upfront and effectively nothing in upkeep beyond an occasional wash. Run a rough 20-year estimate: wood's ongoing maintenance can easily add several thousand dollars in materials and labour over that period for an average-sized deck, on top of the original build cost. Composite's higher purchase price is essentially the whole bill. For homeowners planning to stay put more than a decade, composite usually wins on total cost even though it loses on day-one price.

Is Composite Worth It If You're Selling Soon?

If you're planning to sell within a few years, the calculus shifts. A cheaper pressure-treated deck, built well and kept reasonably tidy, still adds resale value without the higher upfront spend of composite. Deck additions return roughly 65.8-82.9% of cost at resale depending on material, per the 2025 Cost vs. Value Report, and buyers rarely quiz you on which decking brand is underfoot. That said, low-maintenance materials are increasingly what buyers expect; industry market research puts the global decking and railing market on track to grow from roughly $11.94 billion in 2025 to $12.7 billion in 2026, with composite growing faster than wood as homeowners shift toward low-maintenance options.

Which Decking Costs Less: A Worked Example

Picture two neighbours building identical 300 sq ft decks. One chooses pressure-treated pine at $4.50 per square foot in materials; the other chooses mid-range composite at $9 per square foot. That's roughly $1,350 versus $2,700 in decking material alone, before labour and framing, which cost about the same either way. Over the next 15 years, the wood deck owner restains five or six times at $150-300 a time in materials and labour, and eventually swaps out a handful of failing boards. The composite owner spends nothing beyond a hose-down each spring. By year 15, the totals are far closer than the opening price tags suggested, and by year 20, composite is often ahead.

“Homeowners often ask us to just tell them which decking is cheaper. The honest answer is that wood is cheaper to build and composite is usually cheaper to own — the right choice depends on how long you're staying.”

Whichever way you lean, price the whole project before you decide, not just the boards. Framing lumber, footings and labour cost roughly the same under a wood or composite deck, so the material choice mainly changes the surface cost and everything that follows for the next twenty years. Compare pressure-treated pine, composite and hardwood side by side for your exact footprint with the deck material calculator, and weigh that against how long you actually plan to own the house.