Installing a fence is one of those projects that looks simple from the street but involves more technical knowledge than most homeowners expect. The American Fence Association's Fence Installation School dedicates nine modules — from site preparation to concrete mixing to post setting — to training professional installers. This guide distills that knowledge into a practical step-by-step process.
Whether you're building yourself or supervising a contractor, understanding the correct installation sequence helps you spot shortcuts that lead to premature failure.
Before You Start: Planning and Permits
Check Local Codes
Most cities require fence permits, especially for fences over 6 feet. Pull your permit before buying materials — not after. Requirements vary significantly by city, even within the same state.
Call 811 to Mark Utilities
This step is not optional. Per the AFA's site preparation module, a request to your state's one-call service must be made a minimum of 2 business days before any digging begins. Utility markings last 10 days before needing to be re-marked.
Hitting a gas line, fiber optic cable, or water main isn't just dangerous — it's expensive. The 811 service is free.
Get a Property Survey
Build on your neighbor's property and you'll tear it all down at your expense. If you don't have a recent survey, get one ($300–$600). Even if you're confident about the line, a survey eliminates any dispute.
Plan Your Layout
Determine your fence line, gate locations, and post spacing. The AFA recommends creating a materials list before leaving the shop, verifying post weight, length, gauge, and quantity against the project plan. This prevents mid-job supply runs.
Step 1: Lay Out the Fence Line
Mark the fence line using stakes and string.
The AFA method:
- Set stakes at every corner and end point
- Run mason's line between stakes, pulled taut
- Verify corners are square using the 3-4-5 triangle method (measure 3 feet along one string, 4 feet along the other — the diagonal should be exactly 5 feet)
- Mark post locations along the string
Post spacing varies by fence type:
- Wood fence: 6–8 feet on center (most common: 8 feet for 16-foot rail spans)
- Chain link: 10 feet on center for residential, per ASTM F567-07
- Vinyl: per manufacturer specs, typically 6–8 feet
- Ornamental: per manufacturer specs, typically 6–8 feet
Mark each post location with spray paint or a stake. Every terminal post (ends, corners, gate posts) should be marked first, then fill in line posts at equal spacing between them. Read our fence line layout guide for the full marking technique.
Step 2: Dig Post Holes
The AFA's post hole digging module makes one thing clear: post holes are the foundation of every fence, and if they're not dug properly, the integrity of the entire fence is compromised.
Depth requirements per AFA/ASTM standards:
- Minimum: one-third of total post length below grade
- 4-foot fence: 24-inch depth minimum
- 6-foot fence: 30–36-inch depth minimum
- 8-foot fence: 36–42-inch depth minimum
- In frost-line areas: dig below the local frost line (check with your building department)
Diameter: 3 times the post diameter is the standard. For a 4×4 wood post (3.5" actual), dig a 10–12-inch diameter hole.
Our post depth guide covers specific depths by fence type and ASTM standard, including the wind-load charts that determine line post spacing.
Equipment options:
- Manual clamshell digger: works for a few holes in soft soil. Expect sore arms.
- Gas-powered one-man auger: the standard for small to mid-size jobs
- Two-man auger: for rocky soil or large-diameter holes
- Skid-steer mounted auger: for large commercial projects
When you hit an obstruction: The AFA training covers underground obstructions including roots, rocks, and unmarked utilities. If you encounter something unexpected, stop digging and investigate. Relocating a post 6 inches is better than damaging a utility line.
Step 3: Set Posts
Post setting is where fences are made or broken. Per the AFA's post setting module, every post must be plumb (vertical) in two directions, aligned with the fence line, and at the correct height.
Concrete vs. gravel vs. foam:
- Concrete is the professional standard. It provides compressive strength around the post and allows for a shallower footing because it creates a larger cylinder. Per AFA training, concrete is not used to make fences stronger — it anchors posts against lateral movement.
- Gravel/crushed stone works in areas with good drainage. Pack 6 inches at a time, tamping firmly between layers.
- Expanding foam is fast but less proven long-term. It's suitable for light-duty fences in stable soil.
For a deeper comparison, see our post setting methods guide and concrete footings guide.
The concrete pour process:
- Set the post in the center of the hole
- Brace it plumb in two directions using 2×4 braces staked to the ground
- Pour concrete around the post, leaving 1–2 inches from grade for soil coverage
- Crown the concrete slightly above grade so water drains away from the post
- Allow minimum 48–72 hours of cure time before attaching rails or panels
Critical: Don't rush the curing. Per the AFA concrete module, concrete reaches about 70% of its "28-day strength" in the first 7 days. Loading the fence too early causes posts to shift.
Step 4: Install Rails
Once posts are cured, install horizontal rails. The process varies by fence type:
Wood fence:
- Attach a top rail and bottom rail using brackets or toe-nailing
- Top rail is typically 6–8 inches from the top of the fence
- Bottom rail is 6–8 inches from the ground
- For fences over 6 feet, add a mid-rail for structural support
Chain link: Per the AFA's chain link discipline, install the top rail first by sliding rail sections together (swedge end to non-swedge end) through loop caps on line posts and into brace bands on terminal posts.
Vinyl: Insert rails into routed post holes. Allow 48–72 hours of concrete cure time before rail installation, per AFA vinyl installation guidelines. The FIS training emphasizes that vinyl requires special handling — avoid scuffing, scratching, and concrete splashes during installation.
Step 5: Attach Panels, Pickets, or Fabric
Wood fence: Attach pickets to rails using galvanized or stainless steel screws (not nails — they work loose over time). Space pickets consistently using a spacer jig. For board-on-board and shadow box styles, overlap boards by 1–1.5 inches.
Chain link: Stretch fabric from one terminal post to the next using a come-along or fence stretcher. The AFA's chain link discipline covers stretching technique, tying, splicing, and bias cutting in detail. Proper tension is critical — too loose and the fabric sags, too tight and it pulls posts inward.
Vinyl: Slide pickets into routed rails, then secure with lock rings or crimped ends per manufacturer specifications.
Step 6: Install Gates
Gate posts take more stress than any other post in the fence. The AFA recommends deeper footings and larger-diameter concrete for gate posts — especially for double-drive (vehicle) gates.
Set gate hardware (hinges, latches, self-closing mechanisms) according to manufacturer specifications. Pool gates must be self-closing and self-latching per building codes in most jurisdictions. Read our gate installation guide for hardware details by gate type.
Step 7: Final Inspection and Cleanup
Walk the full fence line checking for:
- Posts that are plumb in both directions
- Consistent rail height
- Even picket/panel spacing
- Gate operation (smooth swing, positive latch)
- Concrete crowns draining away from posts
- No debris left on the property
If your city requires a final inspection, schedule it before the contractor's final payment.
Frequently Asked Questions
How long does it take to install a fence?
A professional crew typically installs 100–150 linear feet of wood privacy fence per day in normal soil conditions. A 200-foot project usually takes 2–3 days including post curing time. DIY projects take 3–5x longer.
Can I install a fence myself?
You can, but understand the scope. The AFA's installer training program is 9 modules long for a reason. The most common DIY mistakes: posts not plumb, holes not deep enough, and not waiting for concrete to cure. Consider whether the cost savings justify the risk.
What's the most important step?
Post setting. A perfectly plumb post in a properly sized concrete footing will hold your fence straight for decades. A rushed post in a shallow hole will lean within 2 years.
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*Installation specifications per American Fence Association Fence Installation School training, ASTM F567-07 (chain link), ASTM F537-01 (wood), ASTM F2408 (ornamental), and ASTM F1999 (vinyl).*