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How to Set a Post With Concrete

Valerie Albarda

By Valerie Albarda
Updated August 9, 2023

Anchoring posts to concrete is an easy weekend project that you can tackle in a few simple steps. Once you learn this skill, you’ll be able to set concrete posts for mailboxes or fences whenever you want. Learn more about fencing with concrete posts and how to set a post for a mailbox.

Tools and Materials

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Anchoring Posts to Concrete

Concrete-sunk posts are a sturdy option when you’re setting up a mailbox or building a fence.

Should I Set My Mailbox Post in Concrete?

You don’t need to set a mailbox post in concrete, but it’s a good idea. Concrete serves as a strong foundation for the post, making it a sturdy option for your mailbox.

How Deep Should I Set a Post in Concrete?

In general, the depth of the concrete post hole should be 1/3 to 1/2 the height of the post. So, if your post is 6 feet high, then you should position it in a 2-foot to 3-foot hole. Check your local codes for specific project guidance.

How Deep Should I Set a Metal Fence Post?

The same standard applies to metal fence posts. Set your metal fence post in a hole that’s 1/3 to 1/2 the height of your post but verify the specifics with your local building department. Use a fast-setting mix for convenience when fencing with concrete posts.

How Many Bags of Concrete Do I Need to Set a Mailbox Post?

You’ll need two 50-pound bags of fast-setting concrete to set a mailbox post in a hole that’s 1/3 to 1/2 the height of the post.

Can I Set a Post Directly in Concrete?

You can pour concrete directly into the hole surrounding the post. Add a fast-setting concrete mix and then water to the hole.

How to Set a Post With Concrete

A man pouring QUIKRETE concrete mix into the hole around a mailbox post.

Follow these steps to set a post using a fast-setting concrete mix.