Quick Answer: Should You Use Concrete For Fence Posts?

How much concrete do I need for a post hole?

To calculate how much concrete you need, you need to know the post size you are going to use and how many posts you are installing.

Your post diameter and height determine how big each hole needs to be.

As stated above, fence post holes should be 3 times the diameter of your post and 1⁄3 as deep as your post..

How deep should a 8 foot fence post be?

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. The hole will need to be about 3 times the width of your post.

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.

What is the life expectancy of pressure treated wood?

40 yearsPressure-treated lumber is ideal for outdoor construction as it has a long, useful life span and is much less expensive than alternatives. Treated wood can last more than 40 years.

Will fence posts rot 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. … The concrete at the top should be sloped away from the post to grade level to avoid water pooling around the base.

How long will a treated 4×4 post last in the ground?

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. But young pressure-treated decks, many less than 10 years old, are being shoveled into landfills.

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

Fast-Setting Concrete Mix (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?

Tamp down the gravel. You can use concrete, if desired, but the moisture in the concrete can sometimes cause wooden posts to rot more quickly, while the gravel allows water to drain quickly away from the fence post and into the soil.

How deep should posts be for a 6 foot fence?

2 feetThe 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). Add about 6 inches of QUIKRETE All-Purpose Gravel into the bottom of the hole.

Do pressure treated posts rot in concrete?

Pressure-treated wood will rot in concrete when exposed to wet conditions such as trapped water. In optimal conditions, pressure-treated wood set in the earth may last as long as 40 years. However, when vertically set in a non-draining concrete base, pressure-treated wood may last only a few years.

How long does a pressure treated post last in the ground?

40 yearsTherefore, if you are in the look for proper construction materials for your home, then consider investing in pressure treated wood. According to Forest Products Laboratory and other research agencies, pressure treated poles in the ground can stay up to 40 years without any signs of rot.

What should I put between wood and concrete?

In most cases, either pressure-treated lumber or naturally durable lumber (defined by the IRC as the heartwood of redwood, cedar, black locust, and black walnut) is acceptable. In some cases, separating wood from concrete with a water-impervious membrane or vapor retarder is all that’s required.

What kind of concrete should I use for fence posts?

Fast-setting concrete is ideal for installing fence posts since it doesn’t need to be mixed in a bucket or a wheelbarrow. Once you’ve finished digging your post holes, add about three to four inches of gravel into the bottom and compact it using a post or a 2×4.

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.

Should metal fence posts be set in concrete?

I would be setting them in concrete so you have a good solid base and good ballast. A metal post in concrete won’t rust as long as you dome the top of the concrete so water runs away from the post. … You will have a solid concrete base for your posts without having to mix concrete.

How long should you let fence post set in concrete?

The concrete sets up in 20 to 40 minutes, so you can quickly move on to the next stage of the project (a great convenience when setting fence posts) or backfill the hole to finish the job. Under normal curing conditions, you can apply heavy weight to the post (a basketball backboard, for example) after just 4 hours.

Do you need concrete for mailbox post?

No concrete needed. Bury an empty 6 or 8 inch tube two feet deep, and flush with the ground. Compact the soil around it. Then center and level your mailbox within the tube, and fill around the post with sand.

Should I use 4×4 or 6×6 fence posts?

Instead of 4×4 posts, go with 6×6 posts. The extra size makes a huge difference. It’s a smart place to invest a little extra in your fence, because if your posts distort after they have been set in the ground with concrete, they are extremely difficult to replace.