The decking aisle at any home center now devotes more shelf space to plastic and composite boards than to pressure-treated lumber. Synthetic decking has overtaken wood in new residential builds for one reason: across a 25-year ownership window, the total cost of an engineered deck — material plus maintenance — comes out lower than a wood deck that needs sanding, staining, and board replacements every few years. This guide explains the two main categories, what the leading brands actually cost installed, and how to choose between them based on climate and use.
Composite Versus PVC: The Two Categories
Synthetic decking splits into two camps. Composite boards combine recycled wood fiber with polyethylene or polypropylene plastic — Trex, TimberTech Composite, and Fiberon all sit here. Cellular PVC boards are 100 percent plastic, no wood content — AZEK, TimberTech AZEK, and Wolf Serenity lead this category.
The practical difference: composite is heavier, slightly more rigid, and runs cooler underfoot than first-generation PVC. Modern PVC has closed the temperature gap and now resists fading better than composite. PVC also weighs 30 to 40 percent less, easier on framing for second-story decks. Capped composite is the middle ground — wood-fiber core with a polymer shell on three or four sides.
Real-World Pricing
Material pricing per linear foot of decking board, before installation:
- Trex Enhance Naturals (entry composite): $1.89 to $2.49 per linear foot, $4 to $6 per sq ft.
- Trex Transcend (premium composite): $4.20 to $5.50 per linear foot, $9 to $12 per sq ft.
- TimberTech Composite Reserve: $4.50 to $6 per linear foot, $10 to $13 per sq ft.
- AZEK Vintage (premium PVC): $5.50 to $7 per linear foot, $12 to $15 per sq ft.
- Fiberon Good Life (budget composite): $1.79 to $2.29 per linear foot, $4 to $5 per sq ft.
Installed pricing for a typical 400 sq ft second-story deck runs $9,000 to $22,000 depending on board choice, railing system, and structure type. Add another $1,500 to $4,000 for premium aluminum or cable railing rather than vinyl.
Trex: The Default Composite Choice
Trex dominates the composite category by sheer volume and is often the first quote homeowners get. The Enhance line is the value tier, the Select line is the mid-tier, and the Transcend line is the showcase product with deep grain texture and rich color blends. Warranty is 25-year limited residential, with a 25-year fade and stain warranty on the Transcend tier.
Real-world weakness: Enhance boards heat up significantly under direct sun, and the lighter colors show traffic patterns within five years. Stick with Select or Transcend for high-traffic decks in sunny climates.
TimberTech and AZEK: The Premium Move
TimberTech and AZEK are owned by the same parent company, with TimberTech selling capped composite and AZEK selling cellular PVC. The TimberTech AZEK Vintage Collection looks the most like real stained hardwood of anything on the market — multi-tonal grain, deep embossing, and minimal repeating patterns.
The 50-year fade and stain warranty on AZEK Vintage is the longest in the industry and reflects how confident the manufacturer is in cellular PVC’s UV stability. Worth the 30 percent premium over Trex Transcend if you live in the desert Southwest or anywhere with intense afternoon sun.
Hidden Fastener Systems
Modern composite and PVC boards install almost universally with hidden fasteners — plastic clips that grip a slot in the board edge, leaving zero face screws visible. Common systems include CAMO Edge, Cortex, and the manufacturer-specific clips from Trex and TimberTech. Expect to add $80 to $150 per 100 sq ft for clip systems versus standard face-screw install.
Hidden fasteners do require precise joist spacing — 16 inches on center for most boards, 12 inches on the diagonal. Older decks framed at 24 inches need joist sistering before the new boards can be installed. Factor that into the labor quote if you are reskinning an existing deck.
Climate Matching
Hot, sunny climates favor PVC over composite. Florida, Arizona, Texas, and Southern California decks should default to AZEK or Wolf Serenity for UV stability and surface temperature. Cooler, wetter climates — Pacific Northwest, New England, Upper Midwest — work fine with capped composite, and the lower price point is justified.
Coastal homes need particular attention to fastener corrosion. Use stainless steel or specialty coated fasteners rated for marine environments. Standard galvanized clips will rust within five years in salt spray, leaving streaks across an otherwise pristine deck surface.
Installation Considerations
Synthetic boards expand and contract more than wood with temperature swings. Leave a 1/8-inch gap on butt joints and a 3/16-inch gap on board ends in summer installs. Skip the gaps and you will see buckling at first hot summer day. Check the manufacturer’s spacing chart for your specific install temperature.
Picture-framing — running a perimeter board around the deck edge — adds 5 to 10 percent to material cost but elevates the finished look significantly. Mitered corners need stainless biscuit fasteners or a proprietary edge connector to hold tight through seasonal movement.
Long-Term Cost Math
The case for synthetic over wood gets stronger every year. A pressure-treated deck at $20 per sq ft installed needs sanding and restaining every two to three years at $400 to $700 per session, plus board replacements after year ten. Total 25-year cost: $35,000 to $50,000 for a 400 sq ft deck.
The same deck in TimberTech composite at $50 per sq ft installed needs only periodic cleaning with a deck-specific soap. Total 25-year cost: $20,500 plus $1,500 in cleaning supplies and pressure-washer rentals. Synthetic decking front-loads the cost but eliminates the maintenance burden — and that math gets more favorable every year as labor rates rise.
Common Installation Mistakes
Three mistakes show up over and over on DIY decks. First, mismatched lot numbers — boards from different manufacturing runs can vary subtly in shade, and the difference is glaring on an installed deck. Order all boards from a single batch and confirm the lot number on every pallet. Second, skipping the recommended underframe ventilation. Synthetic boards rely on airflow underneath to dissipate heat; trapping them over solid concrete or sealed substrate accelerates expansion and warping. Third, using the wrong screws. Manufacturer-specified fasteners have engineered head profiles that fit the slot tooling and avoid splitting the cap. Generic deck screws crack edges and void warranties.
