How do I replace a mailbox post?

  • Use a posthole digger to dig a hole about 1 ½’ deep.
  • Use a 5’ tall piece of treated 4”x4” in your posthole, so that about 3 ½’ extend out of the ground. (This is the height specified by the USPS.)
  • Fill the rest of the hole with dry cement, tamping the cement down with a shovel handle every 4”. Leave an inch or two unfilled at the top of your hole.
  • Level your post.
  • Activate the cement using a garden hose or 5-gallon bucket of water.
  • Let the cement dry and cure for a minimum of 48 hours.
  • Nail a treated 12”x6”x1” board to the top of your post and attach your mailbox.
  • Fill in the top of the posthole with dirt. Sprinkle grass seed into the dirt and water.

Check your state and local codes before starting any project. Follow all safety precautions. Every effort has been made to ensure the accuracy and safety of this information. Neither Westlake nor any contributor can be held responsible for damages or injuries resulting from the use of the information in this document.

Check your state and local codes before starting any project. Follow all safety precautions. Every effort has been made to ensure the accuracy and safety of this information. Neither Westlake nor any contributor can be held responsible for damages or injuries resulting from the use of the information in this document.

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