Backyard Fence Post Replacement
kaitlyn and one other contributor
Last updated on Dec 19, 2025
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Introduction
Go to step 1 ↓This guide will walk you though how to replace a rotted fence post.
Fence posts are the main supporting structure for every fence. If even one of them rots or becomes damaged, the whole fence can come down. This can lead to a very costly repair.
This repair can be demanding and possibly dangerous so make sure to wear safety glasses, close toed shoes, and work gloves. Always make sure to be careful when using heavier tools that this repair requires, keep a clean area, and stay focused.
What you need
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Measure the damaged post to purchase the replacement.
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Take photo of post and take note of where the boards are connected.
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Clear out work area of any clutter or hazards.
Ask FixBot
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Use a shovel to dig a deep hole around the post until you expose the concrete below the soil.
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If necessary you can attempt to break off the top of the post to allow for more room. The pickaxe can be a good tool for this.
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Make sure to keep the excess dirt in a small pile, as this is what you need to fill the hole.
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Excavate the dirt surrounding the concrete to allow more room for the pickaxe.
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Use a pickaxe to break up the concrete into smaller chunks and remove them from the hole.
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Carefully lift the post out of the hole.
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Leave the hole as it is, so you don't have to do additional digging.
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Insert the new post into the hole left by the damaged one.
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If the post is loose, place the larger concrete chunks to support the post while you prepare for the next step.
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Fill in the hole about halfway around the post, leaving 6-10 inches below the surface to allow room for the concrete.
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Use the drill and screws to secure the fence support beams to the new fence posts.
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Use 2-3 screws per support to ensure that the fence remains sturdy.
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Pour 3-4 inches of cement into the hole surrounding the new post.
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Following the directions on the cement, pour room temperature water over the powder until it is fully saturated and some water remains on top.
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Wait 2-3 hours for cement to set.
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Cover the cement with the remaining dirt once it has finished setting and pat it down.
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Line up boards with existing boards so they are flush with the ground.
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Use the drill and screws to secure the boards to the the post.
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Use 2 screws at both the top and bottom of the boards to distribute weight.
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Clean up the work area and check for lost screws.
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By the end of this guide the post should be installed and secure.
Team
Austin Community College, Team 73-6, Kapoor Fall 2025 Member of Austin Community College, Team 73-6, Kapoor Fall 2025
AUSTINCC-KAPOOR-F25S73G6
1 Member
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