Composite, pressure-treated, and cedar decking differ in cost, upkeep, and lifespan, and the choice shapes any deck building project. Pressure-treated is the most economical but needs regular staining. Cedar sits mid-range with natural rot resistance. Composite costs the most upfront but asks for almost no maintenance. For Hamilton's freeze-thaw winters, all three work over a code-built pressure-treated frame.
The board you pick is the part you see and walk on. It is also the part homeowners agonize over the most. Below we break down all three the way we explain them on a site visit: by what they cost relative to each other, how much work they ask of you, how long they hold up, how they look, and how they handle an Ontario year. No sales pitch. Just the trade-offs.
What Is Pressure-Treated Decking?
Pressure-treated lumber is softwood, usually spruce or pine, forced full of preservatives so it resists rot and insects. It is the most common decking board in the Hamilton area, and every lumber yard stocks it. If you have seen a deck, you have likely seen pressure-treated.
- Cost level: the lowest of the three. This is the budget choice.
- Maintenance: the highest. A new board comes wet from the treatment process and has to dry and season before it takes its first stain or seal, often a few months up to a full season. After that, plan to re-stain or re-seal roughly every two to three years.
- Lifespan: long when you keep up with sealing, shorter when you do not. Neglected boards can check, cup, or warp.
- Look: utilitarian out of the gate. It accepts stain well, so you can push the colour most directions you want.
- Ontario performance: solid if you stay on top of sealing. Our freeze-thaw cycles drive water into wood and then expand it as ice. A sealed board sheds that water. A neglected board drinks it.
What Is Cedar Decking?
Cedar is a softwood too, but it brings rot and insect resistance from the wood itself rather than from a chemical treatment. It is lighter to handle, dimensionally stable, and it has a grain people genuinely like to look at.
- Cost level: mid-range. It sits between pressure-treated and composite.
- Maintenance: moderate. Left alone, cedar weathers to a soft silver-grey. If you want it to keep its warm colour and stretch its lifespan, seal it on a schedule the same way you would pressure-treated.
- Lifespan: long, helped by its natural resistance to rot and bugs. Sealing extends it further.
- Look: the best-looking natural wood of the three for most homeowners. Tight grain, warm tone, real depth.
- Ontario performance: its dimensional stability means it moves less with our temperature swings, which helps it stay flat and tight through the seasons.
What Is Composite Decking?
Composite is a capped wood-plastic board. A core blends wood fibre and plastic, then a hard shell, the cap, wraps the outside. That cap is what does the heavy lifting against weather. Brands such as Trex are common in this category.
- Cost level: the highest upfront of the three.
- Maintenance: the lowest. No staining, no sealing. A wash when it is dirty is the job.
- Lifespan: long. The capped shell resists rot, insects, staining, and fading, so it holds its colour for years.
- Look: consistent and uniform. Every board matches because the colour is manufactured in, not stained on.
- Ontario performance: strong against moisture and UV, the two forces that wear a deck down here. The one honest trade-off is heat: a dark composite board gets hot in full summer sun.
The Board Is the Surface, Not the Structure
Here is the part that matters more than the board you choose. Whatever surface goes on top, the frame underneath is the same: pressure-treated lumber, built to the Ontario Building Code. Part 9 of the code requires footings to sit on undisturbed soil below the frost line, about 1.2 m, roughly 4 ft, below grade in the Hamilton area. That depth keeps the footings beneath the zone where the ground freezes and heaves every winter.
So the cedar or composite or pressure-treated board you pick changes the look and the upkeep. It does not change the bones. The frame and the footings are what keep a deck flat, square, and standing through a decade of Ontario winters. A beautiful board on a bad frame still fails. Worth knowing too: a building permit is required if a deck attaches to the house, sits more than 0.6 m, about 24 in, above grade, or serves a pool.
Key Differences
Side by side, here is how the three compare on the points homeowners ask about most.
| Factor | Pressure-Treated | Cedar | Composite |
|---|---|---|---|
| Upfront cost | Lowest | Mid-range | Highest |
| Maintenance | High, re-seal every 2 to 3 years | Moderate, seal to keep colour | Lowest, just wash |
| Lifespan | Long if maintained | Long, naturally resistant | Long, capped shell |
| Look | Utilitarian, stainable | Warm natural grain | Uniform, consistent colour |
| Ontario weather | Good when sealed | Stable, resists movement | Strong on moisture and UV |
Which Should You Choose?
There is no single right board, only the right board for how you want to spend your money and your weekends. Use this simple framework.
- Choose pressure-treated if the upfront number is your priority and you are fine maintaining the deck. You trade a lower cost now for a re-seal job every couple of years.
- Choose cedar if you want a real wood look with natural rot resistance and you accept some sealing to keep its colour. It is the middle path on both cost and upkeep.
- Choose composite if you want to stop maintaining a deck entirely and you plan to keep the home long enough for the higher upfront cost to earn its keep. Pick a lighter colour if your yard bakes in afternoon sun.
When we plan the kind of deck we build for Hamilton homeowners, this is the first conversation we have, because the board sets the budget and the maintenance for years. Once the board is chosen, the frame and footings get built to code regardless, so you are free to pick the surface on look and upkeep alone.
Frequently Asked Questions
Which decking lasts longest in Ontario?
Composite usually lasts longest with the least effort. Its capped shell resists rot, insects, and fading, and there is no sealing window to miss. Cedar and pressure-treated can last a long time too, but only if you re-seal them on schedule through our freeze-thaw winters. Neglect shortens both.
Does composite decking get hot?
Yes. Composite absorbs solar heat, and darker boards get noticeably hotter underfoot than lighter ones on a sunny summer afternoon. It is the same physics as any dark surface in direct sun. If your backyard gets full afternoon sun, choosing a lighter composite colour keeps the deck more comfortable for bare feet.
Can you stain pressure-treated decking right away?
Not right away. A fresh pressure-treated board is still wet with preservative from the mill. It needs to dry and season first, often a few months up to a full season, before it will hold a stain or sealer. Seal too early and the finish will not bond, so it peels and wastes your work.
Planning a New Deck in Hamilton?
Picking the right board is the first real decision in any new deck, and it is one we walk Hamilton homeowners through before the footings go in. At The Hammer Construction, we're a Hamilton-based crew, licensed and insured. Get a free quote at our online estimator, call or text (647) 424-1148, or email hello@thehammer.construction