How to Fix a Leaning Fence Post (Brace or Re-Set)
Before you buy anything, find out what is leaning. Push the post and watch the base. If the whole concrete footer rocks in the ground, the footing failed and bracing the post above it will not hold — you re-set it. If the footer is solid but the post itself is soft or rotted at the soil line, the post needs reinforcing. And if the post has rotted through, you are replacing that section. Diagnose first; the three cases have three different fixes.
Diagnose the lean
- Footer rocks in the hole → the concrete-and-post block has loosened. Re-set in fresh concrete.
- Footer solid, post weak or rotting at grade → reinforce with post menders driven beside it.
- Post rotted through → cut out and replace the post section; a bracket can't fix punky wood.
Reinforce a weak post with E-Z Menders
For a post that is leaning because it has weakened at the ground line — not because the footing moved — Simpson Strong-Tie's E-Z Mender is the no-dig fix. Per Simpson Strong-Tie's FPBM44E instructions, you use them in pairs and drive each one about 11" into the ground alongside the post (wedged between the post and the dirt, or the post and the concrete), then fasten to the post with six #9 or #10 × 1-1/2" Strong-Drive SD connector screws (or HDG nails).
- Plumb the post and brace it temporarily; clear dirt and debris from the base.
- Drive the first mender down the lean side until the plate is fully in the ground, then drive a second on the opposite face.
- Fasten both to the post with the connector screws Simpson specifies — they are structural; ordinary nails work loose in a post that is already moving.
- Re-check plumb on two faces with the post level before you call it done.
Re-set a post whose footer let go
If the footing rocked, dig around the block, stand the post plumb, brace it, and pour fresh concrete around it — sizing the bag count with the concrete per fence post calculator. Let it cure before you re-hang the panel.
What straightens a post
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Simpson Strong-Tie FPBM44E E-Z Mender, 4×4 Post (6-Pack)
A steel bracket driven into the ground alongside a weakened or rotted-at-grade 4×4, then screwed to the post — it reinforces the post without digging out the old concrete. Simpson installs them in pairs (one each side).
Irwin 1794482 Magnetic Post Level
Reads plumb on two faces of the post at once and clips on hands-free, so you can brace and fasten while it holds true. You cannot eyeball plumb on a 6-foot post.
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