Composite Decking vs. Pressure Treated: Real-World Comparison for Contractors

Composite costs 2-3x more upfront, but clients rarely understand what they're comparing. Here's how to frame the decision and protect your margins on either material.

Clients ask the composite vs. pressure treated question on almost every deck job. They see a competitor's bid in composite at $22,000 and yours in PT at $14,000 and assume something is wrong with your proposal. Or they ask for composite, you give them a number, and they go quiet.

The honest answer is that both materials build excellent decks. The choice comes down to budget, timeline, and how much maintenance the client will actually do. Your job is to help them make that decision with real numbers, not marketing copy.

Material Cost: What You're Actually Paying Per Linear Foot

Pressure treated lumber runs $3–5 per linear foot for standard 5/4x6 decking. That range moves based on grade, region, and whether you're buying #2 or better. In Central Texas, #2 Southern Yellow Pine at the lumber yard lands around $3.50–4.20/LF in 2026.

Composite decking starts at $8/LF for entry-level boards and runs to $12/LF or higher for premium capped products. Here's how the major brands break out:

• Trex Enhance Basics — $8–9/LF. Uncapped composite. Good entry point, shows wear faster in high-traffic areas.
• Trex Transcend — $10–12/LF. Fully capped, 25-year fade/stain warranty. The most recognized brand name, which matters when closing.
• TimberTech AZEK — $10–13/LF. PVC-based, not wood composite. Lighter, stiffer, excellent moisture resistance. Popular in humid climates.
• Fiberon Concordia — $9–11/LF. Solid performer, often available at regional lumberyards, slightly easier to source than TimberTech in some markets.

On a 400 SF deck with 16" OC joist spacing, you'll use roughly 320 lineal feet of 5/4x6 decking. At $4/LF PT that's $1,280 in boards. At $10/LF Trex Transcend, that's $3,200. The delta is real money before you account for labor, framing, or hardware.

Warranty and Longevity: What the Fine Print Says

Pressure treated lumber carries a 2–5 year limited warranty from most manufacturers, covering preservative retention. It says nothing about checking, cupping, or warping, which PT does — especially in Texas heat cycles. A deck built in 2020 in Austin looks noticeably different from one built in 2026 if it hasn't been sealed annually.

Composite warranties are a different story. Trex Transcend carries a 25-year limited residential warranty against fading, staining, and material defects. TimberTech AZEK backs their PVC boards with a 30-year warranty. These are transferable in most cases, which adds real value at resale.

The catch: composite warranties cover the boards, not the substructure. If your framing fails at year 10, that's on the build, not the material. Use pressure treated ACQ lumber for all framing, joists, and ledger connections regardless of what the decking surface is. Don't let the composite upsell make you cut corners on the bones.

Installation Differences That Affect Your Labor Cost

PT installs faster. Face-screw with coated deck screws, done. No special fasteners, no clip system to learn, no concern about hidden fastener spacing requirements. A two-man crew can deck 400 SF of PT in a solid day.

Composite with hidden fasteners adds time. Trex Hideaway clips require consistent 3/16" gaps between boards, a clip every joist, and careful board-end management at butt joints. Expect 20–30% more labor time on your first few composite jobs until your crew gets efficient. Factor that into your estimate — don't assume composite decks install at the same pace as PT.

A few other field notes: composite boards are heavier than PT per lineal foot, which matters on second-story jobs. They also expand and contract with temperature, so starter gaps and end gaps at walls are mandatory. TimberTech AZEK specifies 1/4" end gaps in most climates. Skip that step and you'll get boards buckling mid-summer.

"We stopped face-screwing composite after one client complained about the screw heads rusting through the plugs. Hidden fasteners add an hour to a 400 SF deck — worth every minute."

Maintenance Reality: What Clients Don't Anticipate

Pressure treated decks need annual maintenance to look good. Sand, clean, seal or stain every 1–2 years. If clients won't do that, PT will gray out, check, and splinter within 3–5 years in a Texas climate. It still functions as a deck, but it won't look like the day you built it.

Composite needs almost none. Soap and water once a year. No sealing, no staining, no sanding. That's the pitch clients actually respond to — not the 25-year warranty, which feels abstract. "You'll never have to sand or stain this deck" lands.

How to Frame the Decision in Your Proposal

Give clients both options in every deck proposal. Line them out clearly: PT option at X, composite option at Y. Let them see the spread. Most clients, when presented with both, will ask what you'd recommend. That's your opening.

Frame it this way: "Pressure treated is a great deck at a lower upfront cost, but you'll want to seal it every couple years. Composite costs more now and you're done — no maintenance, no resealing, and the boards are warrantied for 25 years. If you're planning to sell in 5 years, composite adds more perceived value. If you want the best deck for the budget right now, PT is a solid choice."

That framing respects the client's budget without pressuring them. It also positions you as someone who knows the trade, not just someone quoting materials.

Frequently Asked Questions