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How to Reset a Leaning Fence Post with Concrete
A leaning fence post isn't just an eyesore — it puts stress on every board and rail attached to it. Left alone, one leaning post becomes two, then three. Here's how to reset it properly so it stays straight for years.
Diagnose Before You Dig
Not all leaning posts have the same cause. Push the post back to vertical and look at the base. If the post moves freely, the concrete footing has failed or was never there. If the post is stiff but leaning, the footing may have heaved due to soil movement. If the post base is soft or spongy, it's rotted — and you'll need to replace the post, not just reset it.
What You'll Need
Post hole digger or power auger, fast-setting concrete mix (Quikrete Fast-Setting is ideal), a level, two temporary braces (2x4s work fine), gravel for drainage, and water. For a standard 4x4 post, plan on one 50-lb bag of fast-setting concrete per post.
Step 1: Remove the Old Footing
Dig around the post to expose the existing footing. In Texas clay soil, this is hard work — a breaker bar helps. Remove as much of the old concrete as possible. If the footing is intact but the post pulled out of it, you may be able to reuse the footing with a post anchor — but a fresh footing is always more reliable.
Step 2: Set the Post Depth
The hole should be at least 2 feet deep for a 6-foot fence — deeper is better in Texas clay. Add 4–6 inches of gravel at the bottom for drainage. This is critical: standing water at the post base is what rots posts and heaves footings. The gravel layer keeps the post base dry.
Step 3: Pour and Brace
Set the post in the hole, brace it plumb with your 2x4s, and verify with a level on two adjacent faces. Pour dry fast-setting concrete mix directly into the hole — no mixing required. Add water per the bag instructions. The concrete will set in 20–40 minutes. Keep the braces in place for at least 4 hours before reattaching fence boards.
Finishing Up
Slope the concrete slightly away from the post at the top so water sheds away from the wood. Once cured, treat the post base with a wood preservative if it's not pressure-treated. Reattach rails and boards, and check that the gate (if nearby) swings freely.
Leaning posts are one of our most common calls in Red Oak. We reset them right. Call (214) 872-7785 for a free fence estimate.
Call (214) 872-7785