If your post is rocking around inside of its concrete footing, a good solution is a steel wedge. These can be driven between the post and concrete footing to straighten a leaning or wobbly post.
One method: Purchase a 4x4 post bracket designed to be driven into the ground with a sledge-hammer, these brackets will hold a post quite sturdily, though I would not recommend it for anything too 'heavy duty'.
Stabilize Your Fence Post
You'll first want to dig a few inches of soil out from around the post's perimeter. From there, you can fill the hole with gravel and top the gravel with a rapid-set cement mix. Finally, pound the fence post back into place using a mallet.
Resin is one of the most popular and economical wood stabilizers. The resin stabilization process involves drying the wood and putting it in vacuum chambers to remove all air pockets.
If your fence post is only beginning to wobble, pack down the ground around the base of the post. You can also use a supportive steel fence stake around the base of the post without removing it from the ground.
Add gravel into the hole for improved drainage. Stomp it down with a stick or tamping bar. Place your post in the hole so that it's straight and level with the other posts in the fence or structure. Get an assistant to hold it steady or secure it with stakes and screws to keep it in place.
While expanding foam can secure posts for lightweight fences, such as vinyl or wire mesh, it's better to go with concrete for structural posts, such as posts for porches, decks, or large and heavy gates. Expanding foam is not as strong as concrete when supporting load-bearing posts.
Method 1 Fix your Fence Post with Concrete
With the post supported, fill the hole with the concrete compound to about an inch below ground level. Work the air out of it with your shovel to ensure that it fills the hole completely. Once the concrete has hardened, you can add soil and grass seed over top to cover it.
Fast-setting concrete is ideal for setting posts because there's no mixing—you simply pour the dry concrete from the bag right into the hole, then add water.
One of the simplest methods is simply attaching something to the bottom of the post before putting it in the ground. One method is to nail a piece of wood to the bottom of the post. This device is often called a deadman and is shown in Figure 1.
The deeper you dig the posts, the more stable it will be. I'd personally put one bag of concrete on the bottom and let it cure, then backfill with dirt, compact the dirt and put another bag of concrete near the surface for extra stability.
On average, the cost to repair a leaning fence can range from $150 to $600, depending on the factors we've talked about above. Minor repairs (such as resetting a single post or minor adjustments) could cost as little as $150 to $250.
For lightweight fences, or in locations not subject to high winds, expanded foam is quicker and easier to use. If structural strength is an issue, concrete is still the better choice.
Sika® PostFix® is very durable and does not break down, it will last for several years of service.
While it is hugely useful, it should not be used to solve all problems. One such example is electrical boxes. Expanding foam shouldn't be used in these locations as it could cause jams that would be expensive to repair. So avoid using it around sockets or light fixtures, or any electrical components in the property.
You can fix a leaning fence post without concrete by using gravel or compacted soil to fill the hole and stabilize the post with stakes or braces.
So, a six-foot-high finished post ideally needs to be buried three feet into the ground. You may be able to get away with two feet depending on the weight of your fence, soil conditions and local climate.
If properly treated and installed, pine fence posts can last for 20–35 years; untreated pine posts might only last 3–7 years. chemical in the posts. When large numbers of fence posts need to be installed it is probably most practical to pound them into the ground with a hydraulic post driver, small end first.
Fixing a leaning wooden fence post involves digging around the post and filling the hole with concrete. Start by bracing the post to keep it upright. Dig out soil around the post, ensuring a stable base. Pour concrete mix into the hole around the post and let it set according to the manufacturer's instructions.