# Quick Answer: How Deep Should A 4 Foot Fence Post Be?

## What size fence post do I need for a 4ft fence?

Calculate the post lengths If you’re setting wooden or concrete posts in concrete you’ll need 8ft (2.4m) posts for a 6ft (1.828m) fence – i.e.

your posts are 2ft (0.6m) longer than the fence height.

Use 4in x 4in posts for fences of 5ft and over and 3in x 3in posts for anything under 5ft..

## How deep should a 12 foot post be in the ground?

In general, holes should be at least 3 feet deep for posts that extend 8 feet or more above ground level. Posts that extend 6 feet above ground level should have holes at least 2 1/2 feet deep.

## Should I use 4×4 or 6×6 fence posts?

6×6 is overkill for sturdiness. 4×4 is the standard. And if you do it as a privacy fence, 6×6 posts stand out and make it look more substantial.

## How long will 4×4 post last in the ground?

How long a PT 4X4 lasts in the ground is dependent on where you live, your environment. Basically, It won’t last more than half a decade. I’ve seen treated posts that were under a roof last 40 years. Untreated wood lasts one year, max.

## How far apart should I put my fence posts?

Typically, fence posts are spaced between six and eight feet apart. The corner posts are set first. To align all of the posts in between, stretch a line from each corner post to work as your guide.

## Is 2 feet deep enough for fence posts?

The minimum depth that you should dig your fence post holes for panel sections is 2 feet. A general formula is to dig the holes one-third to one-half of the post’s aboveground height. The deeper you dig the holes, the more stability your fence has, but you must also purchase longer posts.

## How deep should a 5 foot fence post be?

Dig deep. Measure the post and plan on burying at least a third of it. For a 5-foot fence, you’d want an 8-foot post and you’d need a 3-foot hole. Don’t cheat by cutting the post shorter.

## Do you have to use concrete for fence posts?

Concrete is the most secure material for setting fence posts, especially if you have sandy soil. Gravel may be okay with dense, clay-heavy soil, but in looser soil, concrete is the only thing that will truly keep your fence posts stuck in place.

## Can wood fence posts be 10 feet apart?

Typical spacing is right around 8 feet between each post however different circumstances may call for different measurements and it is not uncommon to have spacing between posts reach up to 10 feet. Once you have a rough idea of your post layout start by digging your first hole.

## What kind of gravel should I use for fence posts?

crushed gravelWhen setting fence posts in gravel, you should bury at least one-third of the fence post. Use crushed gravel to set the posts. Pour 5 in. of gravel in the hole around the posts and tamp it down.

## How many bags of quikrete do I need for a fence post?

Remember, the depth of the post hole should be one-half of the above-ground post height. (Example: For a 6 feet above ground post, use a post with an overall height of 9 feet and place 3 feet in the ground). The calculator will indicate the number of 50 lb. bags of QUIKRETE® Fast-Setting Concrete you need.

## How do you keep fence posts from rotting in concrete?

wrap your posts in blueskin from the concrete down. concrete is porous, and the posts will always be wet. keep the top of the concrete a few inches above grade, sloped away. seal the concrete-timber joint with thermoplast.

## How many bags of concrete do I need for a 4×4 fence post?

Mix two 50lb bags of concrete with water in a mixing tub or 5-gallon bucket. Add concrete into the hole and around the 4” x 4”. Depending on your climate, let concrete set up for 24 – 48 hours.

## What size Post do you use for a 6 foot fence?

The depth of the post hole needs to be 1/3 to 1/2 the height of your fence. For example, if you are building a fence that’s 6 feet tall, you will need a hole that is at least 2 feet deep. That also means that you’d need to use an 8-foot post.

## How long will pressure treated posts last in the ground?

3) A deck built with pressure treated wood will last a long time. Promotional literature promises lifelong performance for pressure treated wood. The Forest Products Laboratory and other research groups have shown that treated wood stakes placed in the ground for more than 40 years remain rot-free.

## Can pressure treated posts be set in concrete?

Simply setting the posts in concrete does create a condition that will accelerate rot in the bottom of the posts. With pressure-treated posts, the rot will be slow. … First, the posts should be set on top of a bed of coarse gravel 3 to 6 inches deep, so the base of the post is in contact with the gravel.

## Is 1 ft deep enough for fence post?

You should always bury one-third of your fence post underground. … This means that unless you are building a 2-foot fence, which is unlikely in any garden, a 1-foot hole will not be deep enough to support your post. For main and gateposts, you should dig the holes an additional 6 inches deep.

## How much concrete is in a post hole?

If you’re not sure what size hole to dig, a rule of thumb is to use a hole diameter 3 times the post diameter and 1⁄3 as deep as the post height. See below for more information. Average is \$115 per yd3, although your price will vary based on the type of concrete, vendor, and location.