A post that has failed only at ground level may be suitable for a repair spur if the timber above is still solid. Replace the post when rot extends higher up, the post is split badly, the surrounding concrete has failed, or nearby posts are also moving.
Why fence posts often fail at ground level
The point where timber meets soil or concrete stays damp for longer than the visible upper section. Over time the base can soften while the rest of the post still looks acceptable. Strong wind then turns a small amount of movement into a leaning or broken fence.
When a repair spur can make sense
A concrete or metal repair spur can support a timber post when the damage is concentrated at the base. The upper post needs to be sound enough to fix securely, and there must be room to install the support without damaging nearby services or structures.
- The post is solid above the damaged base.
- Only one or two posts are affected.
- Panels and rails are otherwise serviceable.
- The original concrete footing is stable enough for the chosen repair method.
When the full post should be replaced
Replacement is usually the better option when the timber is soft over a large area, the post has split, the top fixings are failing or the whole fence line is reaching the same age and condition. A new post also gives more flexibility if the panel height or fence layout needs changing.
Check the neighbouring posts as well
A single failed post can hide a wider problem. Push gently at the adjacent posts from ground level and look for movement, cracking around concrete or soft timber. Repairing the obvious post without checking the next bays can lead to another call-out soon afterwards.
Ground and concrete can change the repair
A post set in a large sound concrete footing may be approached differently from one that has loosened in soil. Nearby walls, paving, roots and buried services can also affect whether the old post is removed, supported or replaced in a slightly adjusted position.
Do not assume the visible concrete tells the whole story. A site check may be needed where the footing is unusually large, the boundary is tight or access for digging is limited.
Common questions
Can a rotten wooden post be fixed without removing the panel?
Sometimes. The panel may be temporarily supported while a spur or new post is fitted, but the method depends on the fence design and access.
How long does a fence-post repair last?
That depends on the remaining timber, the ground, drainage and the repair method. A spur is not a cure for timber that is already rotten well above ground.
Why is my fence post moving after heavy rain?
Wet or softened ground can expose a weak footing. Movement can also come from cracked concrete, rot at the base or wind loading on the panels.