Cypress vs Cedar for Docks: 2026 Complete Comparison (2026)
Building a residential dock requires wood that handles constant moisture, sun exposure, and occasional submersion. Cypress and Cedar are two popular natural choices that avoid the chemicals in pressure-treated lumber. Both have strong traditions in waterfront construction, but they differ in key properties that affect dock performance and longevity.
Cypress
Cedar
Key Takeaways
- Building a residential dock requires wood that handles constant moisture, sun exposure, and occasional submersion.
- Cypress and Cedar are two popular natural choices that avoid the chemicals in pressure-treated lumber.
- Both have strong traditions in waterfront construction, but they differ in key properties that affect dock performance and longevity.
- Cypress is the superior dock wood where available — its water resistance and hardness make it purpose-built for waterfront construction.
- Cedar works well for dock decking above the waterline but is less ideal for structural components near water.
| Property | Cypress | Cedar |
|---|---|---|
| Decay Resistance | Excellent (old-growth) | Very good (heartwood) |
| Water Resistance | Excellent — traditional dock wood | Good — better above waterline |
| Hardness (Janka) | 510 lbf | 350 lbf |
| Avg Cost (2x6/LF) | $3–6 | $3–5 |
| Regional Availability | Southeast US | Nationwide |
| Strength | Good | Moderate |
Cypress
Pros
- Superior water resistance — traditional dock and pier wood. Harder than Cedar — better foot traffic resistance. Excellent decay resistance especially in old-growth. Strong tradition in southeastern waterfront construction.
Cons
- Best grades (old-growth) are scarce and expensive. Limited availability outside the Southeast. Second-growth has reduced rot resistance. Heavier than Cedar.
Cedar
Pros
- Available nationwide in dock-grade lumber. Naturally lightweight and easy to handle. Pleasant aroma and attractive appearance. Good decay resistance in heartwood.
Cons
- Softer — wears faster under foot traffic. Less water resistant than Cypress for submerged components. Sapwood rots quickly in dock applications. May not last as long as Cypress near water.
Best Use Cases
Choose Cypress for dock construction in the southeastern US, especially for components near or at the waterline where water resistance is critical. Choose Cedar for dock decking above the waterline in areas where Cypress is unavailable, or for lighter-duty residential docks.
Verdict
Cypress is the superior dock wood where available — its water resistance and hardness make it purpose-built for waterfront construction. Cedar works well for dock decking above the waterline but is less ideal for structural components near water. In the Southeast, Cypress is the clear choice; elsewhere, Cedar with proper maintenance is a solid alternative.