How to Fix a Loose Fence Post in an Afternoon
Keep your fence from going off the rails
- Safety goggles
- Work gloves
- Level
- Power drill
- Utility knife
- Two-by-four wood plank
- Wood stake
- Screws
- Water
- Two 50-pound bags of concrete per post/one to two pouches of rigid post foam
A loose or wobbly fence post may seem like no big deal—there are other posts to support the fence, right? However, a loose post can threaten the integrity of an entire section, and if you don’t fix it (or call a pro in ASAP), you could end up spending far more to replace the whole fence. Instead, grab a shovel and learn how to fix a loose fence post like a pro.
Dig Out Soil to Expose Fence Post Base
To restore your fence post, you’ll need to use a shovel to dig out the soil around the loose fence post. Continue digging until you reach the existing fence post base, which will likely be made of concrete.
Stabilize Fence Post
Photo: duckycards / Getty ImagesUse a level to determine the right positioning for the fence post. Once the post is level, place a two-by-four wood plank at an angle from the top of the post to the ground, then drill the brace into a stake in the ground. This will stabilize the post as it dries.
Mix Concrete or Fence Post Foam
Follow the instructions on your concrete or post foam product to mix.
Mix Concrete
For concrete, open the bag and pour the dry concrete mix into a wheelbarrow. Use the garden hose to add water, occasionally stirring with a shovel until it reaches a consistency similar to crunchy peanut butter or oatmeal.
Mix Foam
To activate the foam product, break the seal on the pouch, then rub the closed pouch across a flat surface to mix it. Continue mixing for about 20 seconds. Cut open the pouch when you’re ready to pour it into the concrete hole.
Fill Fence Post Hole
Photo: tomfotorama / Adobe StockNext, shovel in the concrete mix or pour in the foam. The foam will expand as you pour it into the post hole. For the concrete, continue adding more of the wet concrete until it’s 1 inch from the surface.
Allow to Dry
Follow the instructions on the concrete or foam product label for how long the material needs to dry. Concrete will start to harden within 20 to 40 minutes, but wait at least 10 hours before reattaching the fence or adding any other weight to the fence post. Foam will harden within a few minutes of applying, but wait at least a few hours for it to cure before adding weight.
Reapply Soil and Grass
Finally, cover the fence post base with the soil you removed earlier. Plant grass seed, install sod, or add other decorative plants to finish the job.
Mistakes to Avoid When Fixing a Loose Fence Post
Repairing a loose fence post is a simple DIY task, but there are some beginner mistakes to watch out for.
Working too slowly: If you opt for foam, make sure you work quickly. Foam can harden in just a few minutes, so double-check that your fence post is level before leaving the foam to dry.
Not leveling the fence post: Don’t just eyeball whether the fence post is straight. Use a level to ensure the fence post won’t be leaning after the concrete or foam dries.
Watering too close to the post: After adding soil and grass or plants, avoid getting the fence post wet to prevent the post from rotting.
Repairing a post that’s too far gone: A leaning post sometimes needs a fresh base for stability, but don’t ignore a rotten, warped, or otherwise damaged post. Consider whether repairing or replacing the fence post will be the right fit for a long-lasting fence.
When to Fix a Loose Fence Post
To fix a leaning fence post, make sure to work on a mild, dry day when the threat of freezing overnight is gone. Ideally, late spring through early fall works best for this project, although you should fix a loose fence post ASAP to avoid structural damage to your fence. Here are the best conditions for fixing a loose fence post:
The daytime temperature should be 50 to 90 degrees Fahrenheit.
The overnight temperature should be above 40 degrees Fahrenheit but ideally higher than 50 degrees Fahrenheit.
The forecast should be clear of rain.
DIY Fixing a Fence Post vs. Hiring a Pro
The cost to repair a fence post yourself adds up to around $150, although costs can range from around $50 to $250 depending on how much concrete or foam you need and how many posts you’re fixing. The biggest expense is the fill material. You’ll spend $10 to $30 for two 50-pound bags of concrete or $15 to $30 for each pouch of foam.
While it may take a DIYer about six hours to finish fixing one loose post, a pro can get the job done in about one or two hours. Hiring a pro costs $150 to $400 to fix one fence post. So, who do you call to fix a fence post? Leave this project to a fencing pro near you so that you can get your Saturday back.
When comparing fence post foam versus concrete, concrete is considered more durable and stronger. Concrete is a stronger material that can handle larger amounts of weight, making it a good choice for load-bearing posts. For posts on smaller fences or fences made with lighter materials, like vinyl or wire mesh, post foam is a good choice.
A fence post set in concrete lasts anywhere from five to over 25 years, depending on how well the concrete was applied and the fence post’s material. Untreated wood posts in concrete could last less than 10 years, but a durable, treated wood set in properly applied concrete could last a few decades. However, all fence posts will wear out eventually, so expect to need to replace your fence post every five to 15 years.
Get our Angi-powered app
