The three most common decking materials in the GTA — pressure-treated pine, cedar, and composite — serve very different priorities. Pressure-treated is the budget option with the highest maintenance demand. Cedar sits in the middle on cost and delivers the most beautiful natural wood look. Composite costs the most upfront and the least over the long run. Choosing between them is less about which material is "better" and more about matching your budget, timeline, and maintenance tolerance to what each material actually requires from you over 20-plus years.
This guide focuses on deck board selection. For full deck construction costs including framing, hardware, footings, and permits, see our deck building cost guide for Toronto. For where to source all three materials in the GTA, see our guide to buying lumber in the GTA. Once your deck is built, see our guide to staining a deck in the GTA for wood decks, or our guide to pressure washers for deck cleaning for composite maintenance.
2026 GTA Decking Material Pricing
| Material | Board Cost (per lf, 5/4"x6") | Installed (per sq ft) | 400 sq ft Deck — Installed |
|---|---|---|---|
| Pressure-treated pine | $3.50–$5.50/lf | $25–$40/sq ft | $10,000–$16,000 |
| Cedar | $7–$12/lf | $35–$55/sq ft | $14,000–$22,000 |
| Composite (Trex, TimberTech) | $8–$16/lf | $45–$75/sq ft | $18,000–$30,000 |
| Hidden fastener system (add-on) | $0.50–$1.50/sq ft extra | — | Available for all three materials; eliminates visible screws |
Installed pricing includes deck boards, framing lumber, footings, hardware, and typical contractor labour in the GTA for a ground-level or low single-level deck. Multi-level decks, high decks requiring engineering, glass railings, and complex layouts add to the installed cost. Prices are 2026 GTA market estimates and will vary by contractor and project specifics.
Pressure-Treated Pine: The Budget Workhorse
Pressure-treated pine is the most common decking choice in the GTA for one reason: upfront cost. At $3.50–$5.50/lf for 5/4"x6" deck boards, PT is by far the most accessible entry point. A 400 sq ft deck comes in at $10,000–$16,000 fully installed — roughly $4,000–$14,000 less than composite for the same deck.
✅ Pressure-Treated: Strengths
- Lowest upfront cost of the three materials
- Widely available at every GTA lumber yard and big-box store
- ACQ treatment (since 2004) — no arsenic, safe for residential use
- Strong structural performance for framing and decking combined
- Can be painted or stained to any colour (once fully dry)
- Familiar to all GTA contractors — easy to find experienced installers
⚠️ Pressure-Treated: Limitations
- Must dry 3–6 months after purchase before staining — new boards cannot accept finish immediately
- Prone to warping, checking, and cupping as the wood dries — this is normal but visually imperfect
- Requires staining or sealing every 2–3 years to maintain appearance
- Greenish tint when new (from copper treatment) fades but takes time
- Heavier than cedar — harder to handle during installation
- Lowest curb appeal of the three options when unstained
💡 PT Staining Timeline: The 3–6 Month Rule
New pressure-treated lumber is kiln-dried after treating but still retains more moisture than naturally seasoned wood. Stain or sealer will not penetrate properly until the wood dries out. The standard GTA approach: build your deck in spring, let it weather through one summer, then stain in late August or September when the wood has dried and the exterior temperature is warm enough for good stain penetration (above 10°C). Use the water bead test to confirm readiness: if water drops absorb within 30 seconds, the wood is ready. For staining technique and product recommendations, see our guide to staining a deck in the GTA.
Cedar: Natural Beauty at a Mid-Range Price
Cedar is the favourite choice for GTA homeowners who want the look and feel of natural wood without the wait time or the greenish tint of PT pine. At $7–$12/lf for 5/4"x6" boards and $35–$55/sq ft installed, a 400 sq ft cedar deck costs $14,000–$22,000 — significantly more than PT, but the starting aesthetic is dramatically better and cedar can be stained immediately after installation.
✅ Cedar: Strengths
- Naturally rot-resistant — no chemical treatment needed for boards (posts still need PT)
- Beautiful natural grain — the best-looking of the three when freshly stained
- Lighter than PT — easier to handle and install
- Can be stained immediately after installation — no waiting period
- Lower heat retention than composite in direct Ontario summer sun
- Workable with standard tools; easy to cut and fasten
⚠️ Cedar: Limitations
- Significantly more expensive per board than PT ($7–$12/lf vs. $3.50–$5.50/lf)
- Still requires staining and sealing every 2–3 years
- Softer than PT — more susceptible to denting from heavy furniture
- Will grey to a silver colour if left unfinished — some like this look, many do not
- Supply varies by GTA lumber yard — not always available in large quantities at big-box stores
- Knots in lower grades can be a visual issue — specify clear or select grades for best appearance
Composite: The Zero-Maintenance Premium Choice
Composite decking (Trex, TimberTech, Fiberon, and similar brands) is the fastest-growing segment of the GTA deck market in 2026, driven by homeowners who want a beautiful deck they never have to stain. The upfront cost — $8–$16/lf per board, $45–$75/sq ft installed, $18,000–$30,000 for a 400 sq ft deck — is the highest of the three options. The ongoing maintenance cost is the lowest: wash annually, nothing else.
✅ Composite: Strengths
- Virtually zero maintenance — annual wash with hose and mild soap
- Will not rot, splinter, warp, or crack
- Colour-stable — quality capped composite won't fade significantly for 25+ years
- Typical warranty: 25 years on product from major brands (Trex, TimberTech)
- No staining, sealing, or sanding — ever
- Splinter-free surface — better barefoot experience than wood
⚠️ Composite: Limitations
- Highest upfront cost — $8,000–$14,000 more than PT for same deck size
- Retains heat in direct summer sun — can be uncomfortable barefoot in full GTA sun at midday
- Hollow-core composites are lighter but have more flex underfoot than solid-core
- Cannot be refinished or sanded — what you buy is what you have permanently
- Requires specific fastener systems (especially hidden fasteners for many brands)
- Some budget composite lines lack proper capping — more susceptible to mould and staining
⚠️ Composite Heat Retention in Ontario Summer Sun
Composite decking absorbs and retains more heat than wood in direct sun. On a hot GTA summer day (30°C+), a dark composite deck in full sun can reach surface temperatures of 50–65°C — uncomfortable for bare feet. This is a real issue for GTA homeowners with south-facing decks in full sun. Mitigation options: choose lighter colours (they absorb less heat), add a pergola or shade sail over the deck, or use outdoor rugs. If you are in a full-sun south-facing location and plan to use the deck barefoot regularly, consider lighter composite colours or natural wood alternatives.
How to Choose: Step-by-Step Decision Framework
Set Your Budget: Upfront vs. Lifetime Cost
The most common mistake GTA homeowners make is comparing only upfront costs. A PT deck at $10,000–$16,000 installed requires staining every 2–3 years — at $500–$1,500 per application (professional staining on a 400 sq ft deck), that's $3,000–$9,000+ over 15 years in maintenance costs. A composite deck at $18,000–$30,000 requires only an annual wash. The 20-year lifetime cost gap between PT and composite narrows significantly when maintenance is included. For long-term owners (5+ years in the home), composite's break-even is typically 12–18 years from the date of installation.
Honestly Assess Your Maintenance Tolerance
A PT or cedar deck that is stained every 2–3 years will last 20–30 years and look great. A PT or cedar deck that is never stained will grey out, check, and eventually splinter and rot far ahead of that timeline. Before choosing PT or cedar, ask yourself honestly: will I actually stain this deck every 2–3 years? If the honest answer is "probably not," composite's higher upfront cost is a better investment because it doesn't degrade significantly without maintenance. GTA homeowners who choose PT to save money and then never maintain it often end up with a replacement project in 10–12 years — at full replacement cost.
Get Quotes: Lumber Supplier vs. Composite Dealer
Get PT and cedar quotes from your local GTA lumber yard — see our where to buy lumber in the GTA guide for supplier options. For composite, get quotes from authorized dealers of Trex, TimberTech, or Fiberon — these brands are sold through certified dealers who can also confirm warranty coverage. Big-box stores carry Trex at some GTA locations, but the dealer network typically offers a wider colour and profile selection. Always quote the same deck footprint, the same framing spec, and the same hardware (including fastener system) to make cost comparisons valid.
Choose Your Fastener System
All three decking materials can be installed with face screws (visible on the deck surface) or hidden fasteners (installed between boards, surface is screw-free). Hidden fasteners add $0.50–$1.50/sq ft to the installed cost but deliver a significantly cleaner appearance and eliminate the rust staining that can occur around face screws in wood decking. For composite decking, most brands require or strongly recommend their own hidden fastener system — standard wood deck screws are not appropriate for composite installation. For wood decks, use stainless steel or hot-dipped galvanized exterior screws — standard coated screws will rust through in 5–8 years in GTA's climate.
Side-by-Side: The GTA Decking Decision Matrix
| Factor | Pressure-Treated | Cedar | Composite |
|---|---|---|---|
| Board cost (5/4"x6" per lf) | $3.50–$5.50 | $7–$12 | $8–$16 |
| Installed (per sq ft) | $25–$40 | $35–$55 | $45–$75 |
| Staining / sealing required | Yes — every 2–3 yrs | Yes — every 2–3 yrs | No — wash only |
| Wait to stain after install | 3–6 months | None — stain immediately | N/A |
| Typical lifespan (with maintenance) | 15–25 years | 20–30 years | 25–35+ years |
| Heat retention in GTA summer sun | Low | Low | Moderate to high (dark colours) |
| Best for | Budget builds; willing to maintain | Natural wood look; willing to maintain | Zero maintenance; long-term owners |
💡 The GTA Trend: Composite Is Growing Fast
Composite decking has become the fastest-growing decking category in the GTA market over the past 5 years. The primary driver: GTA homeowners are increasingly time-poor and are choosing to pay more upfront to eliminate ongoing maintenance. A composite deck pays for itself in eliminated maintenance costs and in the "premium feel" that appeals to buyers if the home is sold. If you plan to stay in your GTA home for 10+ years and want a deck that always looks good without annual attention, composite is worth serious consideration. For deck cleaning and maintenance — including composite — see our guide to pressure washers for deck cleaning.
Frequently Asked Questions: Decking Materials in the GTA
❓ Which decking material lasts longest in Ontario's climate?
Composite (25–35+ years with a 25-year manufacturer warranty). Cedar with consistent maintenance (20–30 years). Pressure-treated with consistent maintenance (15–25 years). For all wood products, maintenance consistency is the biggest variable — a well-maintained PT deck outlasts a neglected cedar one.
❓ Is composite decking worth the extra cost in the GTA?
For long-term owners (10+ years), generally yes. The 20-year lifetime cost difference narrows significantly when maintenance costs for wood decks are included. The break-even vs. PT is typically 12–18 years. For homeowners planning to sell within 5 years, the premium is harder to justify financially — though composite is a strong selling feature in the GTA market.
❓ Does pressure-treated wood require staining?
Not to prevent rot — ACQ treatment handles that. But PT left unstained will grey, check, and become rough and splintery within 2–3 seasons. For appearance and surface quality, staining every 2–3 years is effectively required. Use penetrating oil-based exterior stain — not film-forming paint, which peels. See our deck staining guide for product and technique recommendations.
❓ When can I stain new PT lumber?
After 3–6 months of drying. Use the water bead test: drop water on the surface — if it absorbs within 30 seconds, the wood is ready. In the GTA, spring-built decks are typically stain-ready by late August or September. Cedar can be stained immediately after installation. Composite is pre-finished — never stain it.
❓ Which deck boards need the least maintenance?
Capped composite decking (Trex, TimberTech, Fiberon) — annual wash is the only requirement. No staining, sealing, or sanding. Cedar and PT both require staining every 2–3 years. For cleaning and maintaining any deck surface, our pressure washer guide for deck cleaning covers the right tools and technique.