If you want to mark a boundary, line a driveway, or add rustic charm without spending thousands, a wood split rail fence is one of the best values in fencing. It uses heavy posts drilled or slotted to hold two or three horizontal rails, leaving the fence open rather than solid. That open design means fewer materials, faster installation, and a price that typically runs $12 to $30 per linear foot installed, well below the $30 to $60 of a privacy fence. It will not keep a small dog in or block a view, but for defining property lines, framing a pasture, or giving a country property that classic look, nothing beats it on cost and speed. Here is how to figure your materials, price the job, and build it.
Part of our Decks & Outdoor guide — explore the full guide →
How a Split Rail Fence Is Built
The system is simple by design. Posts are set every 8 to 10 feet, and each post has holes or mortises that the tapered rail ends slide into. There is no digging a hole for every rail or screwing pickets; the rails just seat into the posts, which is why a crew can run this fence so fast. Line posts have holes on two sides to accept rails from both directions, while end and corner posts are drilled only where rails connect. The rails themselves are split from logs, giving them that irregular, rustic face.
Two-Rail Versus Three-Rail
Your first decision is rail count, and it changes both look and price:
- Two-rail: about 3 feet tall, lower cost, good for decorative borders and driveway edges
- Three-rail: about 4 feet tall, more substantial, better for livestock containment and a stronger boundary
Three-rail uses roughly 50 percent more rail material, so it costs more, but it reads as a real fence rather than a garden accent. For property lines and pastures I usually recommend three-rail; for a decorative front border, two-rail is plenty.
Choosing the Wood
Species matters for both looks and lifespan. Western red cedar is the premium choice, naturally rot-resistant and holding up 15 to 20 years or more with little care. Pressure-treated pine is the budget option, less pretty but very durable against rot when rated for ground contact. Locust and other rustic hardwoods show up in some regions and last extremely long. Whatever you pick, the posts are the critical part because they sit in the ground; splurge on rot-resistant or ground-contact-rated posts even if you economize on rails.
Cost Breakdown
Split rail is affordable, but costs vary by material and whether you DIY. Rough numbers for materials alone:
- Line post: $15 to $35 each
- End/corner post: $18 to $40 each
- Rail: $10 to $25 each
- Installed by a pro: $12 to $30 per linear foot
- DIY materials only: roughly $8 to $15 per linear foot
For a 200-foot run of three-rail cedar, expect materials in the $1,600 to $3,000 range, or double that for professional installation. DIY cuts the labor, which is often half the total.
Setting the Posts Correctly
The posts make or break this fence, and depth is everything. Set posts one-third of their above-ground height into the ground: for a 4-foot-tall fence with posts standing 4 feet high, plan on posts about 6 feet long buried roughly 2 feet deep. Space them to match your rail length, typically 8 feet on center for a standard 10-foot rail that overlaps in the post holes. In cold climates, dig below the frost line to keep frost heave from lifting the posts and popping the rails loose.
Step-by-Step Installation
Split rail goes up in a logical sequence, and doing it in order avoids the classic problem of a post set where a rail cannot reach:
- Lay out the fence line with string and mark every post location at 8 feet on center.
- Set your first end or corner post in a hole about 2 feet deep, plumb it, and backfill with gravel and tamped soil or concrete.
- Slide the rails for the first section into that post’s holes before setting the next post.
- Set the next post over the far ends of those rails, seating the rails as you plumb the post.
- Backfill and tamp that post, then repeat down the line, always installing rails before setting the receiving post.
- Check alignment with your string line as you go and adjust before the backfill sets.
The key insight is that rails must be threaded in as you set posts, because you cannot slide a rail into two already-fixed posts. Work in one direction and the fence marches down the line.
To Concrete or Not to Concrete
There is honest debate here. Concrete gives maximum stability but can trap water against a wood post and speed rot, and it makes future repairs harder. For a split rail fence, which carries little wind load because it is open, I often set line posts in tamped gravel and soil, reserving concrete for end, corner, and gate posts that take the most stress. Gravel at the base of every post hole helps drainage and extends post life regardless of your method.
Maintenance and Lifespan
Split rail is low-maintenance by nature. Cedar can be left to weather to silver-gray or sealed with a UV-blocking stain every few years to hold its color. Check the rails seasonally, since a rail can work loose from a post over time and simply needs reseating. With rot-resistant posts and decent drainage, a wood split rail fence lasts 15 to 20 years, delivering rustic character and a defined boundary for a fraction of what a solid fence costs.
Adding Wire Mesh for Pets and Livestock
A split rail fence is open by design, so on its own it will not keep a dog, chickens, or small livestock contained. The common fix is to add welded-wire or woven-wire fencing to the back of the rails. You attach a roll of 2-by-4-inch welded wire or a field fence to the inside face of the posts and rails with fence staples or heavy-duty staples, which fills the gaps while preserving the rustic look from the street side. For rabbits or poultry, a smaller mesh at the bottom keeps them from slipping through. This hybrid gives you the charm of split rail with the containment of wire, and it is far cheaper than a solid privacy fence while doing a similar job of keeping animals in or out.
Handling Slopes and Corners
Real yards are rarely flat, and split rail handles grade changes gracefully because the rails simply follow the slope from post to post. On a gentle hill, you let each section angle with the ground, which looks natural and rustic. On a steeper grade, you may step the fence down, keeping each section level and dropping at each post, though the classic split-rail look usually just follows the land. At corners and ends, use posts drilled only on the sides where rails connect, and set these terminal posts especially firmly since they anchor the run. A corner post takes rails from two directions at 90 degrees, so buy the correct corner-bored posts rather than trying to drill your own on site.
Common Mistakes to Avoid
The errors I see most often are all preventable. Setting posts too shallow tops the list; a post buried only a foot deep heaves and leans, dropping the rails, so honor the one-third-of-height rule. Spacing posts wrong for the rail length is another, since split-rail rails are a fixed length and posts must land to receive both ends. Using non-rated posts in the ground guarantees early rot at the soil line, the exact spot posts fail. And skipping gravel at the base of each hole traps water against the wood. Avoid these four and your fence stands straight and solid for its full lifespan, needing nothing more than the occasional reseated rail.
