Knowledge Builders

how deep do i put fence posts

by Ethelyn Thompson Published 1 year ago Updated 7 months ago

Dig post hole so diameter of the hole is 3 times the width of the post (i.e., the hole for a 4” wood post should be about 12 inches wide). The depth of the hole should be 1/3-1/2 the post height above ground (i.e., a 6-foot tall fence would require a hole depth of at least 2 feet).

How deep do my fence posts need to be set?

The answer -— as it often does in fencing construction — depends. As a general rule, Fencing Direct recommends at least a 24-inch footing depth for a 4-foot fence, plus an extra 3 inches for every foot of height (for example, 27 inches for a 5-foot post).

What is the best way to set fence posts?

Wood Fence Tips: Installing Posts, Rails and Pickets

  • Setting Fence Posts. Once you’ve marked the layout for your component-built fence with batter boards and string, you can dig post holes and set all your posts in concrete.
  • Installing Fence Stringers. Once the post concrete has cured, install the horizontal rails, or stringers, between the posts. ...
  • Installing Fence Pickets. ...
  • Wood Fence Tips and Ideas. ...

How deep should fence posts be set?

Step-By-Step Instructions:

  • Dig the post hole, making it three times the width of the post and at a depth equal to 1/3 to 1⁄2 of the above-ground length of the post, plus ...
  • Pour 6″ of gravel or crushed stone into the bottom of the hole.
  • Set the post in the hole.

How deep should a fence post be in the ground?

How deep should posts be for a 5 foot fence:– the general rule of thumb when setting a post is that the depth of the post’s hole needs to be 1/3 of the actual above-ground height of the post. So, a 5 foot high finished post ideally needs to be buried 1.66 feet (20″) deep into the ground and minimum of 12 inches wide.


How deep should an 8 foot post be in the ground?

about 2 feet deepHow Deep Should a Fence Post Be? For an average fence post, about 6 to 8 feet tall, prepare to dig a post hole about 2 feet deep. To install a fence post, you'll need a shovel or post digger, a 6-foot level, soil, and gravel or crushed stone. For gateposts, you'll need concrete too.

How deep should a 10 foot fence post be?

The general rule of thumb when setting a post is that the depth of the post's hole needs to be one-third to one-half of the actual above-ground height of the post. So, a six-foot-high finished post ideally needs to be buried three feet into the ground.

Should fence posts be set in concrete?

It doesn't matter if it is a do-it-yourself (DIY) project or a professional installation, wood fence or vinyl fence, your fence posts should be set in concrete. Without a properly set concrete footer, your fence posts will begin to sag until they eventually fail.

How many bags of concrete do you need for a fence post?

4 bags1 – 4 bags of concrete per fence post are typically what's needed. This depends on the type of soil, fence design, height, post size and bag weight. In general the depth of the post's hole needs to be 1/3 to 1/2 of the above ground height of the post.

How do you drive a 10 foot T post?

1:034:33Installing T posts with a T post driver - YouTubeYouTubeStart of suggested clipEnd of suggested clipIn about a foot into the ground below where the t-post bracket or you post is attached to the post.MoreIn about a foot into the ground below where the t-post bracket or you post is attached to the post. So just using your upper body strength. You're going to want to raise this and pound it.

Is 1 foot deep enough for fence post?

The depth of the hole should be 1/3-1/2 the post height above ground (i.e., a 6-foot tall fence would require a hole depth of at least 2 feet).

How big of a hole do you need for a 4x4 post?

12 inchesThe diameter of your post hole should be three times the diameter of your post. So, if you're planning on using a four-inch round or 4x4-inch square post, your post hole will need to be 12 inches in diameter.

How long should an 8 foot fence post be?

12-footFor our 8-foot (2.4-meter) fence, we need a hole that's 3-feet (91.4-centimeters) deep and a 12-foot (3.7 meter) post [source: Rona].

How deep should a concrete fence post be?

Concrete fence posts are slightly different, still keep with the hole width of 3 times the width of the post, but the depth needs to be at LEAST 2 foot. In some instances upto 3 foot would be absolutely perfect. The reason the holes have to be deeper for concrete, is because of the sheer weight of the posts.

How Long Will a Fence Post Last In The Ground?

Concrete fence posts have a life expectancy of about 25 years with minimal maintenance, but they aren’t immune to wear and tear. Over time rain and wind will eat away at them causing cracks and chips.

What Is The Best Timber For Fence Posts?

The most common species of wood grown in the UK are Larch, Douglas fir, Pine and Spruce (a white wood).

Why do concrete posts have holes?

The reason the holes have to be deeper for concrete, is because of the sheer weight of the posts .

How long do wood posts last?

Wooden posts vary, from 5 years to 20 years, But it all boils down to how they were installed and maintained.

How to find 1/3 of a post?

So to find a 1/3 you would just divide the desired post height above ground by 3 (i.e a 6ft post height divided by 3 would equal 2, so a 2 foot hole would need to be dug).

Are Concrete Fence Posts Better Than Wood?

Concrete fence posts are indeed better than wood for last ability, and they easily pay for themselves over time.

How high should a fence post be?

As a general rule of thumb, you’ll need to place at least 1/3 the height of the post in the ground. For example, a 6-foot tall fence will need at least 2 feet of post in the ground. Consider the frost line in your area. The bottom of the post needs to sit below the frost line (consult local codes for exact requirements).

What to do before digging a fence post?

Before you dig, be sure to call your local utilities company to mark any underground cables. Also, reassess your fence layout and make sure your posts are where you want them. Taking steps to properly plan your fence project before digging your first post hole will save you time (and headaches) in the long run.

Is digging a hole in a fence hard?

Digging post holes is hard work. But it’s work that’s crucial to the long-term performance of your wood fence. Posts form the backbone of your fence, so they need to be set deep enough in the ground to ensure a sturdy foundation.

What happens if you don't dig deep enough to support a fence?

Every garden landscaper or builder will tell you that if the supporting fence posts are not correctly positioned or dug deep enough, your fence will be weak and will not last.

Do you double check fence line dimensions?

Always double check dimensions and measurements so that the fence line will be complete and ready to support your fence panels without the risk of fence failure.

How wide should a 4x4 fence post be?

So, for a standard 4×4, the ideal hole would span twelve inches across. It’s important to note that fence-post holes must be flat-walled and barrel-shaped, maintaining a consistent diameter from top to bottom. If you use a regular shovel, you’ll end up with a cone-shaped hole.

What to do if a fence post fails?

DO Employ a Base Gravel Layer. If a fence post fails without any sign of a pest infestation, it’s likely that the failure was caused by moisture that rotted the wood over time. To help slow such deterioration, add pea gravel or crushed stone to the bottom of the posthole.

What happens if a fence fails?

If they fail, the rest of the fence will follow suit, so it’s crucial to devote special care to setting them properly. Anything less, and you run the risk of having to set the fence posts all over again in only a few years’ time.

How many cubic feet of concrete is in a 60 pound bag?

A standard 60-pound bag of CTS Rapid Set Concrete Mix yields approximately 0.5 cubic feet, so depending on the volume of your hole, you may need to prepare multiple bags at once. Just be careful not to mix more concrete than you can put in place in 15 minutes, before it begins hardening.

Is digging a fence dangerous?

Make no mistake: Digging can be downright dangerous if you don’ t know what lies a foot or two below the ground. As long as you give a wide berth to any buried lines, you should be perfectly safe. As for the posts themselves, a little regular scrutiny and maintenance will help ensure a long life for your fence.


1.How Deep Should I Dig Fence Posts? | HGTV


7 hours ago For our six-foot-high fence post, we would need a hole that’s 36 inches deep and 12 inches in diameter. The depth of your post hole plays a key role in the strength of your posts. It’s a lot harder to push over a post that’s buried deeply, so always keep that in mind.

2.How deep should you dig fence post holes? - Outdoor …


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1 hours ago  · You should dig the holes for the fence posts to a depth of between two and three feet deep.This is the depth that you should consider.Your fence will be more stable if you dig …

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