ARTICLE
How to Choose the Right Fence Posts for Your Property
May 24, 2026 · Frontier Global
A fence is only as good as the posts holding it up. Panels get the attention, but it’s the posts — line, end, corner, and gate — that determine whether your fence runs straight in five years, whether your gate sags, and whether the corners of your yard look intentional or improvised.
Here’s how to think about choosing the right post for each spot in your run.
The four post types you'll need
For a residential aluminum fence install, you’ll use some mix of four posts. Each one is engineered for a specific job:
Line posts — the workhorse
Line posts sit at evenly spaced intervals along straight runs between corners or terminations. They’re the most common post you’ll buy. Their job is simple: keep your panels level, plumb, and aligned.
Plan one line post between every two adjacent panels along a straight stretch. For 72″ wide Lexington Series panels, that means a line post roughly every six feet.
End posts — clean terminations
An end post is what you use where your fence stops — at a building, a wall, a pillar, or where it transitions to a gate. End posts are designed to anchor a panel on one side and present a finished face on the other.
If your fence butts up against your house, that’s an end post. If your fence ends at the corner of a garage, that’s another end post. Buy one for every termination point you can identify on your layout.
Corner posts — 90° transitions
Corner posts handle right-angle turns in your fence line. Unlike line posts, they’re built to receive panels on two adjacent sides, with the structural reinforcement to keep both faces square.
Count the corners in your yard layout. Each one needs a corner post. Don’t try to substitute a line post here — the geometry won’t work, and the install will fight you.
Heavy-duty gate posts — for anything that swings
Gates put load on a post that line and corner posts aren’t designed to take. Every time a gate swings open and shut, it’s torquing the post it hangs on. Standard posts will lean within a few seasons.
Heavy-duty gate posts are reinforced — thicker walls, larger footprint, deeper anchoring — to carry that repeated stress. Use them on both sides of any walk-through gate, and on both sides of drive-through gates as well. (Pool gates have their own self-closing/self-latching code requirements — see Black aluminum pool fencing for that detail.)
How many of each will I need?
A quick way to estimate posts from your yard layout:
- Count each corner in your fence line → corner posts
- Count each termination (house, gate, etc.) → end posts
- Count each gate opening × 2 → heavy-duty gate posts
- Subtract the above from your total post count → line posts
For a typical 100-foot residential perimeter with one gate and four corners, that math looks like: 4 corners + 2 gate posts + 1 end post (at house) + ~10 line posts = roughly 17 posts total.
Installation notes
A few things to know before you dig:
- Depth: Plan footings at least 24″ below grade in most regions — deeper where frost line demands it. Gate posts get the deepest holes.
- Concrete: Set posts in concrete for permanence. Skip the temptation to gravel-pack residential posts; concrete is the difference between a fence that still looks new in ten years and one that doesn’t.
- Spacing: Measure twice. A fence with one mis-spaced post will fight you on every panel after it.
Why aluminum posts beat steel here
Same logic as the panels: aluminum posts don’t rust where they meet the soil. Steel posts almost always fail at the ground line first — the moisture exposure plus oxygen plus organic matter is exactly the corrosion environment iron hates. A powder-coated aluminum post installed in concrete will outlast almost any steel equivalent.
Order what you actually need
The cheapest fence install is the one you only do once. Spend the extra ten minutes mapping your corners, gates, and terminations before ordering. The right post mix the first time is dramatically cheaper than fixing the wrong one later.
Not sure what your yard layout calls for? Send us a quick sketch and we’ll spec the right post count for free — line, end, corner, and gate. A Frontier Global rep will follow up the same day with pricing and shipping.
Not sure how many posts your layout needs?
Send us a quick sketch and a rep will spec the right Line / End / Corner / Gate mix for free — same business day.