By Deck Building Services · Last reviewed
How do pressure-treated and cedar decking compare?
| Factor | Pressure-treated pine | Cedar |
|---|---|---|
| Upfront cost | Lower | Higher |
| Appearance | Green or brown tint, weathers gray | Warm reddish-tan grain |
| Stability | More checking, warping as it dries | More stable, less warping |
| Hardness | Harder; resists dents better | Softer; dents and scratches |
| Rot resistance | Preservative treatment | Natural heartwood resistance |
| Finishing | Wait until dry enough to absorb stain | Takes oil and stain well |
| Weight | Heavier | Lighter |
Which is better for your deck?
Choose pressure-treated pine when budget and toughness matter most; choose cedar when appearance and stability matter and you'll keep up with finishing.
- Busy family deck with furniture moved often: pressure-treated resists dents.
- Showpiece deck or railing: cedar's look stands out.
- Wet, shaded yard: either needs diligent cleaning; consider synthetic boards instead.
- Tight budget: pressure-treated.
Do both need the same maintenance?
Both benefit from yearly cleaning and periodic sealing or staining. Cedar left unfinished weathers to silver-gray; treated pine left unfinished tends to check and split more. Semi-transparent stains with UV protection keep either looking better longer.
Can you mix cedar and pressure-treated wood?
Yes — it's common to use pressure-treated lumber for the hidden framing and cedar for the decking, fascia and railings. Use fasteners suitable for both woods; cedar's extractives can stain around ordinary steel.
Which lasts longer?
Lifespan depends more on construction details, climate and maintenance than on the species alone. Heartwood-rich cedar resists decay naturally; treated pine relies on its preservative. Either fails early where water is trapped.
Do grades matter for treated pine and cedar?
Yes. Higher grades have fewer knots and defects, so they check, warp and splinter less and look better on the walking surface.
For treated pine, premium decking boards with rounded edges make a noticeably better surface. For cedar, heartwood-rich and clear grades resist decay better and look more uniform than knotty grades, at a higher price. Grade often matters as much as species.
Are there environmental differences?
Cedar is untreated wood with natural decay resistance; treated pine relies on preservatives, so offcuts and old boards should never be burned and should be disposed of according to local rules. Both are renewable materials; responsible sourcing certifications are available for some lumber.
How do costs compare over time?
Treated pine wins on purchase price. Ongoing costs are similar because both need cleaning and refinishing; cedar is often refinished to preserve its color, while treated pine is refinished to limit checking and splitting. Neither eliminates maintenance the way capped composite or PVC does.
Which handles wet or cold climates better?
Both perform best with good drainage, airflow and a sealed surface. In long wet seasons, both can grow mildew in shade. In freeze-thaw climates, unsealed treated pine tends to check more. Where moisture is constant, many homeowners move to capped composite or PVC instead.
What fasteners should each wood use?
- Treated pine: hot-dip galvanized or stainless fasteners rated for treated lumber.
- Cedar: stainless or coated fasteners designed for cedar to avoid staining.
- Both: pre-drill near board ends to prevent splitting.
How do they look after a few years?
Left unfinished, both weather toward gray. Cedar ages to a more even silver; treated pine often shows more checking. With regular semi-transparent stain, both keep a warm wood tone.