Fence Repair and Post Replacement: Fixing the Part That Actually Fails
2 min read · Last reviewed March 2026
A leaning fence is almost never a panel problem. It's a post problem, and it's fixable one post at a time.
Fence panels can look fine for decades while the posts holding them up rot at the point where wood meets soil — the spot that stays damp longest and gets the least airflow. Repairing a fence usually means addressing individual failed posts, not replacing the whole run.
Diagnosing a leaning fence
- Push gently on the top of the post. If it moves independently of the panels around it, the post itself has failed at grade.
- Dig a small inspection hole 6-8 inches down next to the post. Soft, dark, or crumbly wood confirms rot.
- Check whether multiple adjacent posts lean the same direction — that pattern usually means a wind event, not individual rot, and points to a different fix.
Replacing a single post without rebuilding the fence
- Detach the panels or rails from the failed post, supporting them temporarily if the neighboring posts are sound.
- Remove the old post and concrete footing — a post-hole digger or reciprocating saw with a demolition blade helps break up old concrete.
- Dig the new hole to the same depth as the surrounding posts, roughly one-third of the post's total length.
- Add a few inches of gravel at the bottom for drainage before setting the new post.
- Set the post plumb, brace it temporarily, and pour concrete, sloping the top away from the post so water sheds off.
- Reattach panels and rails once the concrete has cured — typically 24-48 hours before load, longer for full cure.
| Post material | Typical in-ground lifespan | Common failure point |
|---|---|---|
| Untreated wood | 5-10 years | Rot at grade line |
| Pressure-treated wood | 15-20 years | Rot at grade line, later than untreated |
| Vinyl-sleeved wood | 20-25 years | Sleeve cracking, water trapped inside |
| Steel (galvanized) | 25+ years | Rust at the soil line if galvanizing is scratched |
When it's a rebuild, not a repair
If more than roughly a third of the posts in a run have failed, or panels themselves are also splitting and warping, a full rebuild is usually more cost-effective than a series of one-off repairs — labor to access and replace posts individually adds up faster than a coordinated rebuild.
Can I fix a leaning post without digging it out?
Sometimes, with a repair bracket or by adding fresh concrete around a post that's simply loosened rather than rotted. A rotted post below grade needs to come out.
How long does new concrete need to cure before I hang the gate?
Wait at least 48-72 hours before hanging gates or applying lateral load; concrete keeps gaining strength for weeks but is functional by then.
Run the numbers for your own project
- Deck and Fence Material CalculatorHow much timber does my deck or fence need?
- Concrete CalculatorHow much concrete do I need?
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