The Rise of Composite Decking: Is It Worth the Premium?

The Composite Question

Ten years ago, the conversation at our counter was simple: pressure-treated pine for the structure, maybe cedar for the deck boards if the budget allowed. Today, at least half of our deck-building customers ask about composite materials. The market has shifted dramatically, and for good reason — but composite isn't automatically the right choice for everyone.

What Is Composite Decking?

Modern composite deck boards are made from a blend of wood fibers (often recycled sawdust) and plastic polymers (often recycled polyethylene). The best products feature a polymer cap that wraps the board entirely, protecting the wood-fiber core from moisture, UV, and staining. Brands like Trex, TimberTech, Fiberon, and Deckorators dominate the market, each offering multiple product lines at different price points.

The Cost Comparison

Let's look at real numbers for a 300-square-foot deck in Chicago:

• Pressure-treated pine decking: $2.50 to $3.50 per linear foot for 5/4x6 boards. Total decking material cost: roughly $800 to $1,200.
• Mid-range capped composite: $5.00 to $7.00 per linear foot. Total decking material cost: roughly $1,600 to $2,400.
• Premium composite or PVC: $8.00 to $12.00 per linear foot. Total decking material cost: roughly $2,600 to $4,000.

Note that the substructure is almost always pressure-treated lumber regardless of the decking surface. Composite joists exist but are rarely cost-effective for residential work. So the premium applies only to the visible deck boards, fascia, and railing.

The Maintenance Factor

Here's where composite earns its premium back. A pressure-treated deck needs staining or sealing every one to three years. Each application costs $300 to $600 in materials for a 300-square-foot deck, plus a full weekend of sanding, cleaning, and applying product. Over 20 years, that's $3,000 to $6,000 in maintenance materials alone — not counting your labor time.

A capped composite deck needs periodic washing with soap and water. That's it. No sanding, no staining, no sealing. Most manufacturers offer 25- to 50-year warranties against structural failure, fading, and staining. When you add the maintenance savings to the initial price difference, composite often breaks even around year eight to ten.

Performance in Chicago's Climate

Chicago tests decking materials brutally. Summer sun reaches 95°F on dark surfaces, and winter brings repeated freeze-thaw cycles with road salt exposure. Modern composites handle this well — the capped surface resists moisture absorption that causes freeze-thaw damage. However, composites do get noticeably hotter than wood in direct sun, which matters if you walk barefoot. Lighter colors help significantly.

Pressure-treated lumber handles the cold well but absorbs water readily. Without consistent sealing, the freeze-thaw cycle causes checking (surface cracks), cupping, and eventual structural softening. In Chicago, untreated PT deck boards rarely last more than 10 to 12 years before they need replacing.

Our Recommendation

For customers who want a low-maintenance deck and plan to stay in their home for more than five years, mid-range capped composite is an excellent investment. For rental properties, budget-conscious builds, or homeowners who genuinely enjoy the ritual of annual deck maintenance, pressure-treated lumber remains a perfectly solid choice.

We stock both options and can show you samples side by side. Come in with your deck dimensions and we'll price out both scenarios so you can make an informed decision based on your specific situation.