When it's time to replace your deck or porch railings, the two most common options are aluminum and wood. Both have their place, but for Ontario homeowners dealing with harsh winters, salt exposure, and strict building codes, the differences matter more than you might think.
Durability: Ontario Winters Are Brutal
Wood railings absorb moisture. In Ontario's freeze-thaw cycle, that moisture expands and contracts inside the wood, causing cracking, splitting, and eventually rot. Most pressure-treated wood railings show visible deterioration within 5–8 years.
Aluminum railings are completely impervious to moisture. They won't rot, warp, crack, or attract insects. A properly powder-coated aluminum railing will look the same in year 20 as it did on installation day.
Maintenance: The Hidden Cost of Wood
Wood railings need sanding and re-staining every 1–2 years. Factor in the cost of stain ($50–$100), brushes, prep time, and a full weekend of labour. Over 10 years, maintenance costs alone can exceed $1,500–$2,000.
Aluminum railings require zero maintenance beyond an occasional rinse with a garden hose. The powder-coat finish is baked on at 400°F — it won't peel, chip, or fade.
Cost Comparison (2025 Installed Prices)
- Pressure-treated wood: $40–$70/linear foot installed
- Cedar wood: $60–$100/linear foot installed
- Aluminum picket: $75–$120/linear foot installed
- Aluminum with glass: $145–$250/linear foot installed
Wood looks cheaper upfront, but the lifetime cost of aluminum is lower when you factor in zero maintenance and 25+ year lifespan. Wood railings typically need full replacement every 10–15 years.
Building Code Compliance (SB-13)
Both materials can meet Ontario Building Code requirements, but wood railings are more likely to fail inspection over time as joints loosen and connections weaken. Aluminum's welded or mechanically fastened connections maintain their structural integrity indefinitely.
For a detailed breakdown of Ontario railing code requirements, see our OBC railing safety guide.
The Verdict
If you're building a temporary structure or have a very tight budget, pressure-treated wood works. For everything else — especially front porches, elevated decks, and any railing that needs to last — aluminum wins on every metric that matters.
Get a free quote to see the price difference for your specific project.
