Fencing
How to Choose the Best Lumber for Your Fence Project (2026)
A well-built wood fence adds privacy, security, and curb appeal to any property. But the lumber you choose determines whether your fence stands strong for decades or sags and rots within a few years. This guide covers species, grades, sizing, and budgeting so you make the right call.
Key Takeaways
- A well-built wood fence adds privacy, security, and curb appeal to any property.
- But the lumber you choose determines whether your fence stands strong for decades or sags and rots within a few years.
- This guide covers species, grades, sizing, and budgeting so you make the right call.
- Rot resistance — fence posts sit in or near the ground and need maximum decay protection.
- Dimensional stability — boards that warp and twist create unsightly gaps and stress fasteners.
What to Look For
- Rot resistance — fence posts sit in or near the ground and need maximum decay protection.
- Dimensional stability — boards that warp and twist create unsightly gaps and stress fasteners.
- Appearance on both sides — consider whether you want a finished look on the neighbor's side too.
- Wind load capacity — taller fences and solid-panel designs need heavier posts and rails.
- Local building codes — many municipalities regulate fence height, setbacks, and even materials.
Species Comparison
Western red cedar: The gold standard for fencing. Naturally rot-resistant heartwood, lightweight, and weathers to an attractive gray. Moderate cost.
Pressure-treated pine: Most affordable rot-resistant option. Accepts stain well after drying. Heavier than cedar.
Redwood: Beautiful rich tone with excellent natural durability. Higher cost limits it to premium projects.
White oak: Extremely durable hardwood with natural tannins that resist decay. Heavy and harder to work.
Cypress: Southern alternative to cedar with similar rot resistance and workability. Regional availability varies.
Size Guide
4x4 posts (3.5" x 3.5" actual): Standard for fences up to 6 feet tall on 8-foot spacing.
6x6 posts (5.5" x 5.5" actual): Required for fences over 6 feet or high-wind areas.
2x4 rails (1.5" x 3.5" actual): Horizontal supports between posts. Use three rails for fences over 5 feet.
1x6 pickets (0.75" x 5.5" actual): Standard fence board width. Dog-ear and flat-top profiles available.
1x4 pickets (0.75" x 3.5" actual): Narrower option for picket-style fences with spacing.
Grade Guide
Premium/#1: Tight knots, straight grain. Best for visible pickets and rails.
#2: More knots and minor defects. Good for standard residential fencing.
Utility: Larger knots and some wane allowed. Acceptable for back-of-property fencing.
Post grade: Look for full-heartwood or UC4A/UC4B pressure-treated ratings for in-ground posts.
Budget Breakdown
Pressure-treated pine fence: $8–$15 per linear foot installed.
Cedar fence: $15–$25 per linear foot installed.
Redwood fence: $25–$40 per linear foot installed.
Material-only costs run roughly 40-50% of installed price.
Biggest cost factors: fence height, post spacing, gate count, and terrain difficulty.
Common Mistakes to Avoid
- Using untreated pine for posts — they rot at the ground line within 3-5 years.
- Setting posts too shallow — posts should be buried at least 1/3 their total length.
- Not allowing for ground contour — racking or stepping panels requires planning.
- Attaching pickets to only two rails on tall fences — add a third rail to prevent warping.
- Forgetting about gates — gate openings need reinforced posts and proper hardware planning.
Pre-Purchase Checklist
- Verify local code requirements for height, setback, and materials
- Select species appropriate for ground contact (posts) and above-ground (pickets)
- Confirm post spacing matches your rail and picket lengths
- Check all boards for straightness before purchase
- Plan gate locations and order heavy-duty hardware
- Order 10% extra pickets for waste and future repairs
- Arrange for utility locates before digging post holes
Frequently Asked Questions
Pressure-treated pine rated UC4A or UC4B, or naturally durable species like black locust or white oak set in gravel for drainage.
Standard spacing is 8 feet on-center for most residential fences. High-wind areas or fences over 6 feet may need 6-foot spacing.
Cedar fences weather naturally to gray without stain. Apply a UV-protective finish if you want to preserve the original color.
A cedar or pressure-treated fence typically lasts 15-25 years with basic maintenance. Proper post installation is the biggest factor in longevity.