PVC vs Composite Decking in Ontario: Key Differences

PVC vs composite decking in Ontario: compare durability, cost, winter performance, and maintenance. Learn which low-maintenance option suits your KWC deck.

You're shopping for low-maintenance decking and keep seeing "composite" and "PVC" — but aren't they the same thing? Not quite. While both eliminate the staining and rotting headaches of wood, they're built differently and perform differently in Ontario's freeze-thaw climate.

PVC (polyvinyl chloride) decking is 100% plastic with no wood fibers. Composite decking blends wood fibers with plastic. That difference affects everything from how they handle winter salt to what you'll pay per square foot.

What PVC Decking Actually Is

PVC decking contains zero wood content. It's solid plastic made from polyvinyl chloride, the same material used in vinyl siding and plumbing pipes. Most brands use a cellular structure — think of it like rigid foam — with a protective cap on top.

The cap layer (typically 0.5-1mm thick) wraps all four sides of each board to resist scratches, stains, and UV fading. Without any wood fibers inside, PVC boards won't absorb water, rot, or grow mold.

Common PVC brands in Canada:

Expect to pay $75-110/sqft installed for PVC decking in KWC, including substructure, boards, railings, and labour.

What Composite Decking Actually Is

Composite decking mixes wood flour or wood fibers (40-70%) with plastic (30-60%). The wood component comes from reclaimed sawdust or recycled materials. The plastic is typically polyethylene (PE) or polypropylene (PP).

Most composite boards sold in Ontario today are "capped composites" — they have a thin plastic shell protecting the wood-plastic core underneath. Uncapped composites (bare wood-plastic blend exposed) have largely disappeared from the market due to fading and staining issues.

Common composite brands in Canada:

Expect to pay $65-95/sqft installed for capped composite decking in KWC. Learn more about composite deck costs in Waterloo.

Side-by-Side Comparison

| Feature | PVC Decking | Composite Decking |

|---------|-------------|-------------------|

| Material | 100% plastic, no wood | 40-70% wood fibers + plastic |

| Weight | Lighter (hollow cellular core) | Heavier (solid core) |

| Water absorption | ~0.1% (virtually none) | 0.5-2% (minimal but present) |

| Mold/mildew | Extremely resistant | Good resistance (capped versions) |

| Fade resistance | Excellent (best available) | Good to very good |

| Scratch resistance | More prone to scratches | Better scratch resistance |

| Heat retention | Gets very hot in sun | Hot, but slightly cooler than PVC |

| Installed cost (KWC) | $75-110/sqft | $65-95/sqft |

| Materials-only cost | $8-14/sqft | $5-9/sqft |

| Color range | Limited (typically 6-12) | Wide (20-40 options) |

| Texture options | Smooth to moderate grain | Wide variety, deeper wood grain |

| Warranty | 25-50 years | 25-50 years |

Ontario Winter Performance

Freeze-Thaw Cycles

Ontario averages 40-60 freeze-thaw cycles per winter in KWC. Water expands when it freezes, so any moisture inside decking material can cause cracks or warping over time.

PVC advantage: With virtually zero water absorption (~0.1%), PVC handles freeze-thaw cycles better than any other decking material. You won't see the micro-cracking or surface deterioration that can develop in other products.

Composite performance: Quality capped composites absorb 0.5-2% water by volume. That's still excellent (solid wood absorbs 30-40%), but over 15-20 winters, repeated freeze-thaw can cause some surface checking or minor expansion issues. Most manufacturers account for this in their engineering, and warranty claims remain rare.

Snow and Ice Removal

Both PVC and composite can be damaged by metal snow shovels or ice choppers.

Safe removal methods:

PVC scratches more easily than composite, so if you're aggressive with winter clearing, composite might show less visible damage long-term. Learn more about winter deck care in Ontario.

Temperature Extremes

Both materials expand and contract with temperature. Ontario sees temperature swings from -25°C to +35°C, a 60-degree range.

Expansion rates per 16-foot board:

Your installer should leave proper expansion gaps (typically 6mm between board ends, 3mm between board sides). Most warranty claims related to buckling or gapping stem from improper installation, not material failure.

Heat Retention in Summer

Here's the uncomfortable truth: both PVC and composite get hot in direct sun. Surface temperatures in July can reach 45-55°C (113-131°F) — hot enough that you'll want deck shoes or a wet towel under your feet.

Temperature rankings (hottest to coolest):

1. PVC (darkest colors) — 50-55°C

2. Dark composite — 48-52°C

3. Light composite — 43-47°C

4. Light PVC — 45-48°C

5. Pressure-treated wood — 40-43°C

Strategies to reduce heat:

Neither material holds a meaningful advantage here. If heat is your top concern, consider pressure-treated wood — it runs cooler but requires annual maintenance.

Durability and Lifespan

Scratch Resistance

Composite wins. The wood fibers inside composite boards create a denser, harder surface. PVC's all-plastic construction is softer and shows scratches more easily from:

Light scratches on PVC often can't be buffed out because you're removing the protective cap layer. Composite scratches are less visible and sometimes buff out with fine sandpaper.

If you have large dogs or move furniture frequently, composite holds up better to daily wear.

Stain Resistance

PVC wins. Its solid plastic composition resists stains from:

Capped composite resists stains well, but its wood-fiber core means you might see surface staining over time if the cap layer gets scratched through. Most stains clean off easily with deck cleaner, but PVC starts with a higher baseline resistance.

Fading

PVC wins slightly. Both materials fade over the first 12-18 months as UV light breaks down surface pigments. After that initial fade, both stabilize.

Expect 10-15% color shift on composite, 5-10% on PVC. Darker colors fade more noticeably than light grays or tans. This isn't a defect — it's normal weathering, and both materials are warrantied against "excessive" fading (typically defined as more than 20% color change).

Ontario's long winters mean less UV exposure than southern climates, so your deck fades slower than the same product installed in Florida.

Expected Lifespan

Both should last 30-40+ years in Ontario with minimal maintenance. Most manufacturers offer 25-50 year warranties covering:

Real-world failure is rare. You're more likely to replace boards due to design changes or renovations than actual material breakdown.

Cost Breakdown (2026 KWC Pricing)

Materials Only

PVC decking boards:

Composite decking boards:

Installed Cost (Complete Deck)

For a 12x16 deck (192 sqft) including framing, boards, railings, stairs, and labour:

PVC deck total: $14,400-21,120 ($75-110/sqft)

Composite deck total: $12,480-18,240 ($65-95/sqft)

Cost difference: PVC runs $2,000-3,000 more on a typical 200 sqft deck.

Long-Term Value

Both require virtually no maintenance beyond occasional washing. Over 25 years:

PVC total cost: $14,400-21,120 (initial) + ~$0 maintenance = $14,400-21,120

Composite total cost: $12,480-18,240 (initial) + ~$0 maintenance = $12,480-18,240

Pressure-treated total cost: $8,640-12,480 (initial) + $3,000-6,000 (staining/sealing) = $11,640-18,480

The maintenance-free benefit of both PVC and composite easily justifies their higher upfront cost versus wood. Between PVC and composite, the $2,000-3,000 premium for PVC buys you slightly better stain/fade resistance and freeze-thaw performance — whether that's worth it depends on your priorities and budget.

Installation Considerations

Substructure Requirements

Both PVC and composite need proper framing underneath. Most building codes (including Ontario) require:

PVC is lighter than composite, but that doesn't meaningfully change framing requirements. Follow manufacturer specs and Ontario Building Code standards.

Fastening Methods

Hidden fasteners are standard for both PVC and composite. They clip into the board grooves and attach to joists underneath, leaving a clean surface with no visible screws.

Face-screwing (drilling through the board surface) is only used for:

PVC and composite use the same hidden fastener systems. Expect $1.50-2.50/sqft for clips and installation labor.

Cutting and Handling

Both cut easily with standard circular saws or miter saws using carbide-tipped blades.

Key differences:

Installation labor costs are similar. Most KWC deck builders charge $25-45/sqft for complete installation regardless of whether you choose PVC or composite.

Maintenance Requirements

Regular Cleaning

Both need washing 1-2 times per year:

1. Sweep off debris (leaves, dirt, pollen)

2. Spray with garden hose to remove loose material

3. Apply deck cleaner (oxygen bleach or manufacturer-approved product)

4. Scrub with soft brush for stubborn spots

5. Rinse thoroughly

Never use:

Expect 15-30 minutes per 100 sqft for routine cleaning.

Stain Removal

PVC: Most stains wipe off with warm soapy water. For stubborn stains (rust, grease, tannin), use a Magic Eraser or manufacturer cleaner.

Composite: Same approach. Capped composite resists most stains, but dried-on materials may need scrubbing. Avoid abrasive cleaners that could wear through the cap layer.

Mold and Mildew

PVC: Rarely develops mold because plastic doesn't support organic growth. If mildew appears (usually from dirt buildup, not the board itself), it washes off easily.

Composite: Capped composite resists mold well, but shaded/damp areas can develop surface mildew over time. Clean with oxygen bleach solution. Learn more about composite deck maintenance in Ontario.

Long-Term Care

Neither requires:

You'll never need to refinish these decks. That's the entire point of choosing synthetic materials over wood.

Aesthetic Options

Color Selection

Composite decking offers 20-40+ colors across brands:

PVC decking offers 6-12 colors per brand:

If you want a specific color match or exotic wood look, composite gives you far more options.

Texture and Grain Patterns

Composite advantage: Manufacturers create deeper, more realistic wood grain patterns in composite because the wood fibers inside allow for complex embossing. You'll see:

PVC texture: Limited to surface embossing only. The all-plastic composition restricts how deeply manufacturers can emboss texture. PVC generally looks more uniform and "synthetic" compared to composite.

If natural wood aesthetics matter to you, composite delivers a more convincing result.

Environmental Considerations

Recycled Content

Composite decking:

PVC decking:

Both are more sustainable than harvesting new timber, but composite has a clearer environmental story due to its wood waste recycling.

End-of-Life Disposal

Neither material biodegrades. When you eventually replace boards:

Composite: Can sometimes be ground up and reprocessed into new composite (closed-loop recycling). Many manufacturers accept old boards back, though this isn't standard practice yet in Ontario.

PVC: Can be recycled into new PVC products (pipes, siding, etc.), but requires specialized recycling facilities. Most PVC decking ends up in landfills.

Pressure-treated wood is also not biodegradable due to chemical treatment and must go to landfill or special disposal facilities.

Making the Decision: PVC or Composite?

Choose PVC if:

Choose Composite if:

Choose Neither if:

Most homeowners in KWC choose composite because it offers the best balance of performance, aesthetics, and cost. PVC makes sense for specific use cases (high stain risk, extreme shade) but isn't automatically "better" — it's just different.

Installation Permits and Code

Both PVC and composite follow the same permit requirements in Kitchener-Waterloo-Cambridge:

Material choice doesn't affect permit approval. Inspectors care about structural safety (framing, footings, railings), not whether you used PVC or composite. Learn more about deck permits in Kitchener, Waterloo, or Cambridge.

Common Questions

Is PVC decking better than composite in Ontario?

Not automatically. PVC offers slightly better stain resistance and freeze-thaw performance, but composite provides more color options, better scratch resistance, and costs $2,000-3,000 less on a typical deck. Both last 30-40+ years with minimal maintenance. Choose based on your priorities: if stain resistance matters most, go PVC; if budget and aesthetics matter more, choose composite.

Does PVC decking get hotter than composite in summer?

Yes, slightly. PVC reaches 50-55°C in direct sun versus 48-52°C for dark composite. Both get uncomfortably hot in July and August. Light-colored boards run 3-5°C cooler than dark colors in both materials. If heat concerns you, choose light gray or tan colors regardless of material, and plan shade structures.

Can you mix PVC and composite on the same deck?

Technically yes, but it's not recommended. Different expansion rates (PVC expands more than composite) can cause gapping issues where the two materials meet. Color and texture won't match either. Most builders stick to one material for the entire deck surface. You could use one material for decking and the other for railings, but you'd still need to manage the aesthetic mismatch.

How long does PVC decking last compared to composite?

Both last 30-40+ years in Ontario with proper installation. Warranties run 25-50 years for both materials. Real-world failures are rare before 30 years. PVC's zero-water-absorption gives it a theoretical edge in freeze-thaw climates, but quality capped composite handles Ontario winters without issues. You'll likely replace either material due to design changes, not material failure.

Is PVC decking worth the extra cost?

Depends on your priorities. The $2,000-3,000 premium on a 200 sqft deck buys you better stain resistance, marginally better freeze-thaw performance, and slightly less fading. If you entertain frequently (spill risk), have a heavily shaded deck (mold risk), or simply want the "best" material available, PVC justifies its cost. For most homeowners, composite delivers 95% of PVC's benefits at a lower price point.

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