Check with the building codes department in your city to determine how deep you need to dig the post holes. Cold weather climates usually require post holes to be below the frost line, but a rule of thumb is to bury about half of the length of the post.
Line up the post holes at the ends of the string you used to layout your fence position. Use a gas powered auger or a manual post hole digger and dig the post holes to the appropriate depth.
Fill the post hole with 5 or 6 inches of gravel. This will allow for better drainage and help extend the life of the posts.
Place the post into the hole on top of the gravel, and line up the edge of the post with the layout string. Use a plumb line and a 4-foot level to make sure the post is level on all sides. Adjust the post to level by moving some of the gravel around at the base, or simply have someone hold it in place while you pour the concrete.
Pour mixed concrete into the hole until the concrete fills the hole and comes up a little above the ground. Use a trowel to slope the concrete at the top of the hole towards the ground to help drain water away from the post.
Brace the fence gate post firmly until the concrete is set.
Things You Will Need
- Gate posts
- 4-foot level
- Gas-powered auger
- Post hole digger
- Ready-mix concrete
- Plumb line
- Mix the concrete in a wheelbarrow, according to package directions. This makes it easier to fill the hole by just tipping the wheelbarrow and moving it in with a shovel.
- Take your time when leveling the posts before pouring the concrete. A level post will make the entire project function better and last longer.