What's the difference between composite and PVC decking?

Capped composite has a wood-fiber + plastic core wrapped in a hard polymer cap. Full PVC has a 100% plastic core (no wood content) with a similar cap. Composite is heavier (5-6 lb/sqft), warmer underfoot (+15-22°F over PT), and more recycled (80-95%). PVC is lighter (4 lb/sqft), cooler (+7-11°F), longer-lasting (35-45 yrs vs 25-32), and fully mold-immune. PVC costs $1.50-3.00/lf more upfront. Choose composite for budget + wood-feel + more colors; choose PVC for performance + pool/coastal exposure + longer lifespan.

Is PVC decking better than composite?

On technical specs — yes. PVC outperforms composite on lifespan (+10-15 yrs), heat retention (~6-15°F cooler), weight (25-30% lighter), and mold immunity (100% vs 70-90%). PVC also gets longer warranties (30-50 yr fade/stain vs 25-35 yr composite). On price + aesthetics — composite wins. Premium composite (Trex Transcend) at $8.95/lf has 13 colors with deep multi-tone grain; equivalent PVC (AZEK Vintage) is $9.50/lf for 7 colors. Composite captures more recycled content. Total premium for PVC over premium composite: typically $1,000-2,500 on a 200-300 sqft deck.

Does PVC decking get hot in the sun?

Yes, but less than composite. PVC mid-tier (AZEK Vintage) hits ~99°F at 90°F ambient direct sun, vs premium composite (Trex Transcend) ~106°F. Difference: 7°F — noticeable barefoot but not dramatic. The bigger heat factor is color: dark Spiced Rum or Coastline (either class) adds 6-10°F. For barefoot pool decks, pick PVC + a light color (Sand Dune, Coastline) — you'll get 12-18°F lower surface temp than dark composite.

How long does PVC decking last vs composite?

PVC: 35-45 years (AZEK Vintage 40, Advanced PVC Vintage 45, premium PVC 42). Composite: 25-32 years (Trex Enhance 25, Trex Transcend 30, Trex Signature polymer 40). The lifespan gap reflects organic-vs-inorganic durability — composite's wood-fiber core eventually breaks down even with a cap. PVC has no organic content, so lifespan is limited only by UV degradation (slow with modern stabilizers) + physical wear. Real-world: 30-yr-old AZEK decks are still in service; 25-yr-old composite decks typically show cap micro-abrasion + occasional cap-failure spots.

Is composite or PVC better for a pool deck?

PVC, decisively. Pool decks face constant chlorinated splashback + humidity + sometimes saltwater. Composite's wood-fiber core absorbs moisture if cap is damaged (which happens over years — micro-scratches from chair drags, dropped tools). Once the core gets wet repeatedly, mold + early rot. PVC has zero organic content — splashes evaporate, no substrate for mold. AZEK Vintage or Landmark in a light color (Coastline, Sand Dune) is the pool-deck gold standard. Trex Signature (mineral-polymer, not true composite) also works. Avoid traditional composite for pool decks unless budget forces it.

Is composite or PVC more eco-friendly?

Composite has higher recycled content (80-95% vs PVC 50-55%) — Trex famously processes 95% recycled wood/plastic, capturing reclaimed wood waste + post-consumer plastic film. PVC is ~55% recycled vinyl scrap. Lifecycle analysis: PVC's longer lifespan (35-45 vs 25-32 yrs) reduces total disposal volume over a homeowner's lifetime — partially offsetting lower recycled-content per board. For LEED/sustainability projects: composite scores higher on Materials category; PVC scores higher on Durability. Both far less environmentally impactful than virgin tropical hardwood.

What's cheaper, composite or PVC decking?

Composite, at every tier. Entry composite (~$3.75/lf) vs entry PVC (~$8.25/lf) — composite 55% cheaper on boards. Mid: $6.25 vs $10.00, composite 38% cheaper. Premium: $9.25 vs $12.25, composite 24% cheaper. The gap narrows as you go up because premium composite (Trex Signature) is mineral-reinforced polymer that approaches PVC in cost. Total installed delta on a 200 sqft deck: $400-1,800 in PVC's favor at retail. PVC's 25-yr TCO catches up sometimes (lower cleaning) but rarely flips the math.

Can you mix composite and PVC on one deck?

Technically yes, aesthetically risky. Both classes use identical PT substructure, identical hidden fasteners (5mm clip systems are interchangeable), and identical 5.5″ standard board widths. You could trim PVC fascia with composite field boards. But the cap textures + colors don't match exactly between classes — composite tends to have deeper grain texture, PVC slightly smoother. Mixed-class installs look almost-but-not-quite-aligned, which homeowners regret. If you want PVC's performance for a high-traffic zone (stairs, pool surround) and composite for the main field, set a deliberate transition (different color, picture-frame border) so it reads as intentional design.

Do composite and PVC use different fasteners?

No — both use proprietary hidden-fastener clip systems that work on any grooved-edge board, regardless of cap class. Trex Universal Hidden Fasteners, TimberTech CONCEALoc, Fiberon Phantom — any clip system works on either composite or PVC grooved boards. For face-screwed installs (non-grooved boards), use composite/PVC-rated stainless or coated screws (Camo Edge, TigerClaw HF-Composite) — same screw works for both classes. PT substructure beneath is identical — 2×8 or 2×10 joists at 12-16″ o.c. depending on board orientation.

Is PVC decking worth the extra cost over composite?

Yes if any of: (1) Pool/coastal/humid environment — PVC's mold immunity is non-negotiable here, the $1,500 premium pays back in lifespan + zero remediation. (2) You're staying in the home 20+ years — PVC's 35-45 yr lifespan crosses your ownership horizon while composite needs replacement. (3) Midday-sun deck with heavy barefoot use — PVC's 6-15°F lower surface temp matters daily. (4) You want the longest fade/stain warranty available (Advanced PVC Vintage 50-yr). No if: budget is tight, deck is shaded/north-facing, you'd accept replacement in 25 years, or you want the broadest color palette (premium composite still leads at 12-13 colors).

material-class · 10-dimension scoreboard · pool/coastal flag

Composite vs PVC Decking Calculator

The cap-class decision tool — pick a capped composite tier (entry / mid / premium representing Trex Enhance, Select, Transcend + TimberTech EDGE, TERRAIN+, LEGACY) against a full-PVC tier (entry / mid / premium representing AZEK Harvest, Vintage, Landmark + Zuri + Wolf). 10-dimension scoreboard: installed cost · 25-yr TCO · lifespan · warranty · heat retention · weight · mold/insect immunity · color count · recycled content · made-in. Pool/coastal flag forces PVC when mold immunity matters. Built on 2026-Q1 retail + manufacturer technical data. Different from Trex vs TimberTech (brand-vs-brand) — this is the material-class decision for buyers who already ruled out wood.

3 composite tiers3 PVC tiers10-dimension scoreboardPool/coastal flag25-yr TCO2026 retailFree forever

$3.75-12.25·Board $/lf range

25-45yr·Lifespan range

+7-22°F·Heat retention

10-dim·Mold immunity 10/10

Inputs

Deck dimensions

Lengthlonger side

Widthshorter side

Effective area192 sqft

Board LF (incl waste)452.4 lf

Composite tierTrex, TimberTech composite, Fiberon, Deckorators

PVC tierAZEK PVC, Zuri, Wolf

Scope

Project yearsTCO horizon

Stair countnumber

State2-letter

Head-to-head

Premium capped composite vs Mid-tier full PVC · 192 sqft · PA (Northeast)

Recommended for this scope

Premium capped composite

Examples: Trex Transcend · TimberTech LEGACY · Fiberon Sanctuary II · Trex Signature (polymer)

Lower 25-yr TCO by $1,398 — install + maintenance. Composite captures 30pp more recycled content and delivers 12 colors vs PVC's 7. Cost difference often $1,000-2,500 on a typical deck.

Composite

Premium

Trex Transcend

Install: $15,501
$/sqft: $81
Lifespan: 32 yr
25-yr TCO: $15,741
Wins: 5 dim

Full PVC

Mid

TimberTech AZEK Vintage

Install: $16,947
$/sqft: $88
Lifespan: 40 yr
25-yr TCO: $17,139
Wins: 3 dim

10-dimension scoreboard

Dimension	Composite	PVC	Winner
Installed cost Real 192-sqft project install. PVC typically runs $1.50-3.00/lf more upfront on boards alone.	$15,501	$16,947	Comp
25-yr TCO Install + 25 years of cleaning maintenance. Both negligible vs PT, PVC slightly less (3-5¢ vs 5-10¢/sqft/yr).	$15,741	$17,139	Comp
Expected lifespan PVC outlasts composite by 10-15 years on average. Composite's wood-fiber core eventually breaks down even with a cap; PVC has no organic content to degrade.	32 yr	40 yr	PVC
Fade/stain warranty Manufacturer-backed warranty against fading/staining. Premium PVC tops out at 50 yrs vs composite's 35 yrs.	35 yr	30 yr	Comp
Heat retention (sunny 90°F) PVC absorbs less radiant heat than composite (denser organic-cap thermal mass). Light colors mandatory for either if barefoot midday use matters.	+15°F	+9°F	PVC
Board weight PVC is ~25-30% lighter than composite. Easier install + lower load on substructure (joists/beams can run longer spans).	5.85 lb/sqft	4.15 lb/sqft	PVC
Mold/insect immunity Full-PVC is 100% mold-immune (no organic content). Composite's wood-fiber core can mold if cap is damaged or moisture penetrates end grain. Critical for pool/coastal/humid environments.	9/10	10/10	Tie
Color options Premium composite (Trex Transcend) leads color count at 13. PVC catching up — Vintage 7 colors, Landmark 4.	12 colors	7 colors	Comp
Recycled content Composite captures more recycled material per board (wood-fiber + plastic). PVC is ~55% recycled vinyl scrap. Lifecycle: PVC's longer lifespan reduces disposal frequency, partially offsetting lower per-board %.	85%	55%	Comp
Made in Both manufactured in USA. Composite mostly VA, NV. PVC OH (AZEK Co), PA, TX (Wolf, Zuri).	USA	USA	Tie
Total dimension wins			Comp 5·PVC 3·tie 2

Tier averages — actual brand-specific specs differ. Pool/coastal flag forces PVC if mold immunity advantage is significant. Made-in is neutral (both classes mostly US-manufactured).

Cost breakdown (high estimate)

Line item	Composite	PVC
Boards (waste +8%)	$4,185	$4,524
Hidden fasteners	$163	$163
PT framing substructure	$1,440	$1,440
Brand-matched railing	$2,600	$3,600
Stairs	$980	$980
Labor (Northeast 1.22×)	$4,451	$4,451
Project install	$15,501	$16,947
25-yr maintenance	$240	$192
25-yr TCO total	$15,741	$17,139

Identical PT pressure-treated substructure (joists/ledger/posts) for both classes. Board, fastener, and brand-matched railing differ. Labor effectively identical — same install process and clips. 2026-Q1 retail tier averages.

How to use

Three steps. Permit-ready output.

Enter deck size + state

Length × width in feet, shape (rectangle or L-shape — L-shape applies 0.85 area factor + 1.10 perimeter premium). 2-letter state code for regional labor (Northeast 1.22× / West 1.28× / South 0.92× / Midwest 1.00×).

Pick a composite tier

Entry ($3.75/lf avg — Trex Enhance Basics, TimberTech EDGE, Fiberon Promenade), Mid ($6.25/lf — Trex Select, TimberTech TERRAIN+, Fiberon Sanctuary), Premium ($9.25/lf — Trex Transcend, TimberTech LEGACY, Trex Signature polymer). Tier price averages across leading composite brands at that tier. Lifespan ranges 25-32 yrs with cap protecting the wood-fiber core.

Pick a PVC tier

Entry ($8.25/lf — TimberTech AZEK Harvest, Wolf Serenity), Mid ($10.00/lf — AZEK Vintage, Zuri Premium), Premium ($12.25/lf — AZEK Landmark, Advanced PVC Vintage). All full-PVC tiers have no organic core — 100% mold-immune. Lifespan 35-45 yrs. Most have 50-yr structural warranty.

Scope: railing + stairs + pool/coastal

Toggle brand-matched railing (composite $65/lf or PVC $90/lf), stair count, and the pool/coastal flag. Pool/coastal forces the calc to PVC if mold-immunity advantage is meaningful — composite's wood-fiber core absorbs moisture if cap is damaged or end grain isn't sealed, leading to early rot in chlorinated/salt environments.

Read recommendation + caveat

10-dimension scoreboard with TCO tie-breaker. Recommendation card includes a caveat highlighting the loser's distinctive strength — if PVC wins but composite has 5+ more colors, the caveat surfaces it. If composite wins but the project is pool/coastal, the caveat warns about moisture exposure to wood-fiber cores.

How we calculate

The math, fully transparent.

The Composite vs PVC Calculator is the cap-class decision tool — pick a capped composite tier (entry / mid / premium representing Trex Enhance, Select, Transcend + TimberTech EDGE, TERRAIN+, LEGACY + Fiberon/Deckorators equivalents) against a full-PVC tier (entry / mid / premium representing AZEK Harvest, Vintage, Landmark/Advanced PVC + Zuri + Wolf). 10-dimension scoreboard: installed cost · 25-yr TCO · lifespan · warranty · heat retention · weight · mold/insect immunity · color count · recycled content · made-in. Pool/coastal flag forces the calc toward PVC when moisture/humidity is constant. Built on 2026-Q1 retail + manufacturer specs. Pairs with the Trex vs TimberTech Calculator (brand-vs-brand) and Composite Deck Cost Calculator (multi-brand BoM).

IRC references

ASTM D7032 — Plastic + composite deck-board standard (load + dimensional stability)
ICC-ES AC174 — Acceptance Criteria for deck-board systems — both classes certified
IRC 2021 R301.4 — 40 psf live load on residential decks
IRC 2021 R507.4 — Composite deck-board spans (24″ o.c. typical for square-edge boards)
IRC 2021 R312.1.2 — Guardrail 36″ min height — both classes' rail kits meet at 36″ + 42″

2026-Q1 retail tier averages. Composite tiers: entry $3.75/lf (Trex Enhance Basics, TimberTech EDGE), mid $6.25 (Trex Select, TimberTech TERRAIN+), premium $9.25 (Trex Transcend, TimberTech LEGACY, Trex Signature). PVC tiers: entry $8.25 (AZEK Harvest, Wolf Serenity), mid $10.00 (AZEK Vintage, Zuri Premium), premium $12.25 (AZEK Landmark, Advanced PVC Vintage). Hidden fasteners $0.85/sqft. PT substructure $7.50/sqft. Brand-matched railing $65 composite / $90 PVC /lf. Stairs $245/step. Labor $14-24/sqft × regional multiplier. Maintenance composite $0.05-0.10 / PVC $0.03-0.05 /sqft/yr cleaning.

Installed cost — both classes same formula

projectHigh = (boardLf × pricePerLf + fasteners + framing + railing + stairs) × 0.92-1.08 + labor + 8% contingency

Identical engine: board LF = area / 0.458 × 8% waste × tier $/lf + $0.85/sqft hidden fasteners + $7.50/sqft PT substructure + brand-matched railing ($65 composite / $90 PVC /lf) + $245/step stairs. Composite/PVC labor identical ($14-24/sqft × regional). PVC's higher board $/lf (~$2-3/lf premium) flows through to install delta of typically $400-1,800 on a 200-300 sqft deck.

25-yr TCO

tco = projectHigh + maintenancePerSqftPerYear × area × tcoYears

Both classes need only cleaning maintenance (soap + soft brush; pressure-wash rare). Composite ranges $0.05-0.10/sqft/yr (more porous cap = more cleaning effort); PVC $0.03-0.05/sqft/yr. Over 25 years on 192 sqft: composite $240-480, PVC $145-240. TCO crossover (where PVC's lower maintenance offsets higher upfront) hits around year 22-28 for mid-tier PVC vs premium composite.

Lifespan modeling

expectedLifespan = warrantyYears + class_track_record_adjustment

Composite track record: 25-32 yrs with full cap intact (Trex Transcend ~30, Trex Signature polymer ~40). Cap failure or end-grain water entry drops to 15-20 yrs. PVC: 35-45 yrs (AZEK Vintage 30-yr installs still functional; 50-yr warranty matches typical home-ownership horizon). No organic core to degrade = lifespan limited only by UV + physical wear.

Heat retention

deltaF = surfaceTemp - PT_baseline at 90°F ambient

Composite organic-fiber-rich core absorbs more radiant heat (+15-22°F over PT baseline). PVC mineral-reinforced core absorbs less (+7-11°F). Difference at 90°F ambient direct sun: ~6-15°F lower for PVC. Dark colors add 6-10°F regardless of class. PVC's heat advantage is most noticeable on midday-sun decks.

Mold immunity

score = 10 - (organic_content_fraction × penalty)

PVC scores 10/10 — zero organic content, fully waterproof, no mold substrate. Composite entry-tier scores 7/10 (3-side cap leaves bottom exposed); mid 8/10 (4-side cap); premium 9/10 (4-side cap + sealed end grain). Pool/coastal exposure penalizes composite further — constant moisture + chlorine/salt accelerates cap microabrasion → eventual fiber-core exposure.

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