Cumaru vs Pressure-Treated Pine
Complete side-by-side comparison to help you choose the right wood
Cumaru and Pressure-Treated Pine represent two very different approaches to deck building. Cumaru is a premium exotic hardwood delivering 20+ years of performance with minimal care. Pressure-Treated Pine is the most affordable and widely available decking option. Here's how they stack up when you look at the full picture.
| Property | Cumaru | Pressure-Treated Pine |
|---|---|---|
Janka Hardness | Better 3,330 lbf | 690 lbf |
Lifespan | Better 20–30+ years | 10–15 years |
Upfront Cost | $6–10/sq ft | Better $2–4/sq ft |
Lifecycle Cost (30yr) | Better Lower — one installation | Higher — likely needs replacement |
Fire Rating | Better Class A | Class C |
Chemicals | Better None — naturally resistant | Chemical preservatives (ACQ/CA-C) |
Maintenance | Better Optional annual oiling | Annual stain/seal required |
Warping/Splitting | Better Minimal — very stable | Common — especially first year |
Workability | Requires pre-drilling, carbide tools | Better Easy — standard tools |
Availability | Specialty lumber dealers | Better Every hardware store |
The Verdict
Cumaru costs 2–3x more upfront but lasts 2–3x longer, requires less maintenance, and looks dramatically better. Over a 30-year period, Cumaru often costs less than two rounds of pressure-treated decking. If your budget allows, Cumaru is the smarter long-term investment. If you need the lowest possible upfront cost, PT Pine gets the job done — just plan for more maintenance and earlier replacement.
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