Home Depot Mailbox Post Cement. July 5, 2018 installed mailboxes here is a gibraltar gentry (rubbermaid) mailbox and post assembly we installed in lisle, illinois. My original plan was to simply stick the post in the ground, and back fill with dirt.
Do not embed the post in concrete unless the mailbox support design is shown to be nchrp 350 compliant when so installed. The post doctor is the #1 fence or mailbox 4 x 4 post repair device on the market. 4.9 out of 5 stars 260.
Pour concrete powder into the hole, leaving 4 to 5 inches (10 to 13 cm) of space at the top.
Leave 4 to 5 inches (10 to 13 cm) of space at the top to cover. 4.9 out of 5 stars 260. It's one piece design that will anchor a sagging post from the subterranean wood below the cement and clamp it. So i bought a 4 x 4 post and quick set cement to put the post 2’ in the ground.
